Fiat Coupe Forum
- Founded by Kayjey & James Northam
- Funded by the Club for the benefit of all owners
Fiat Coupe Club UK
join the club
Fiat Coupe Forum
 
» Announced
    Posting images


» Related sites
    Main club site
    fiatcoupe.net


» External data
    owners listed
 
Who's Online Now
1 registered members (Nigel), 124 guests, and 4 spiders.
Key: Admin, Global Mod, Mod
Forum Statistics
Forums67
Topics110,478
Posts1,311,317
Members2,191
Most Online731
Jan 14th, 2020
Top Posters(All Time)
barnacle 32,327
stan 32,098
Theresa 22,938
bockers 21,019
PeteP 19,431
JimO 17,908
Nigel 17,205
Jim_Clennell 16,346
nismo 15,137
RSS Feeds
Club Events
Club Information
Track Events
Rolling Road/RWYB
Social Events
Non-UK Events
Coupé Related Chat
Coupé Spotting
Coupé News/Press
Buying/Selling Advice
Insuring a Coupé
Basic FAQ's
How to Guides
Forum Issues
Technical Problems
General Maintenance
Styling
Tuning
Handling
ICE and Alarm
Coupés for Sale
Coupés Wanted
Parts for Sale
Parts Wanted
Group Buys
Business Forum
Other Vehicles for Sale/Wanted
Other Items for Sale/Wanted
Haggling/Offers
Ebay links
Other Cars
Other Websites
General Chat
Previous Thread
Next Thread
Print Thread
Page 2 of 2 1 2
Re: Engine Noise - Dead or not? Advice needed (vids) [Re: ] #1617821
25/03/2018 21:54
25/03/2018 21:54
Joined: Oct 2010
Posts: 77
Denmark
mli Offline
Reaping the fruits
mli  Offline
Reaping the fruits

Joined: Oct 2010
Posts: 77
Denmark
Thanks for following up guys.

@ cc: yeah 10w-60 probably best - I think I misunderstood SAE J300 when I read about it yesterday. 60 means higher viscosity at hot engine... When I changed to 10w-40 last night my oilpressure dropped to 1.5bar hot idle (from 2.5bar with 10w-60).
Also noise is slightly worse with 10w-40 - and comes back a bit quicker when going from 1500rpm back to idle. (Oilpressure drops slightly quicker as well).

@mago: i guess noise from manifold would not disappear when changing temp/revs?

@graham: I haven't timed exactly - but my notion is that noise is there for 2-3mins after cold start. Then while engine is warming up the noise disappear for about 7-10mins.
Then the noise start to appear slowly when engine reaches normal temp.

My theory was that some tappets were not able to keep oilpressure inside (eg due to poor retain valve inside) - hence I cleaned all and changed 4.
But since all feels hard now I'm not sure...
I'm considering now if it's due to 1 or more tappets being too small in diameter - hence can tilt slightly when pushed by cam? I noticed that one tappet can tilt slightly...
Can this create noise when hitting cylinder for tappets?
I guess noise from this would disappear with higher oilpressure.

Re lazy valve: not sure I understand how noise can disappear if this is the reason.

@graham re blocked oil channel: this is a used cylinder head I got - don't know if it's been stored for long all dirty.
Now I'm sad I didn't do a complete cleaning of it before installing...

Next step:
Check gaps for tappets with gauge.
Recheck hardness and tilt for all tappets.


SprintBlue 20vt '97
Prev.:Coupe16v'94,Alfa156/33,MareaSW,2xPunto,2xUno
Re: Engine Noise - Dead or not? Advice needed (vids) [Re: ] #1617823
26/03/2018 04:25
26/03/2018 04:25
Joined: Dec 2005
Posts: 17,205
Staffordshire
Nigel Online sleepy
Club Member 123
Nigel  Online Sleepy
Club Member 123
Forum veteran

Joined: Dec 2005
Posts: 17,205
Staffordshire
Has this engine been run at high boost? (Eg 1.5 bar or above?)

Is it modified at all?

I only ask because I had all 20 tappets replaced on my last Coupe and it turned out to be a bent rod (piston slapped the bore on the exhaust stroke only, hence a “half engine speed” knocking)


[Linked Image]
Re: Engine Noise - Dead or not? Advice needed (vids) [Re: ] #1617830
26/03/2018 08:16
26/03/2018 08:16
Joined: Dec 2005
Posts: 3,732
Pothole City
GrahamL Offline
Forum is my job
GrahamL  Offline
Forum is my job

Joined: Dec 2005
Posts: 3,732
Pothole City
Once it's warmed up and the knocking is there at idle, then you rev it and noise disappears... how long does it take for noise to come back when you stop revving it and engine is idling again?

Have you actually driven it properly on the road to see what happens when you have high oil pressure for a long time?

Re: Engine Noise - Dead or not? Advice needed (vids) [Re: ] #1617889
26/03/2018 20:38
26/03/2018 20:38
Joined: Oct 2010
Posts: 77
Denmark
mli Offline
Reaping the fruits
mli  Offline
Reaping the fruits

Joined: Oct 2010
Posts: 77
Denmark
Thanks for interest and inputs!

@nigel
I don't have complete history but I haven't pushed it very hard.
But the reason for changing the cylinder head was blown gasket and water coming in one (or two) of the cylinders.
This could have lead to bent piston rod I guess :-/ (oh my)
As I recall - but not sure at all - pistons were flush with engine block. Maybe thats what I want to remember...

In your case did the knocking disappear when revs were a bit higher? (Eg >1500rpm)


@graham: the noise/clacking/knocking reappear some 2-3secs after drops to idle. Following the drop in oilpressure it seems.
I haven't had the car on the road recently. No registration... But a few trips around the field could probably be done without risk :-) (countryside)
As replacement for driving I had it running at 3000rpm for 1-2mins - after warming up - after changing tappets.

M


SprintBlue 20vt '97
Prev.:Coupe16v'94,Alfa156/33,MareaSW,2xPunto,2xUno
Re: Engine Noise - Dead or not? Advice needed (vids) [Re: ] #1617890
26/03/2018 20:45
26/03/2018 20:45
Joined: Oct 2010
Posts: 77
Denmark
mli Offline
Reaping the fruits
mli  Offline
Reaping the fruits

Joined: Oct 2010
Posts: 77
Denmark
Sorry nigel: I think it's standard turbo etc - the guy that had it before me wanted to keep an original setup.
(It has adjustable shocks though...)


SprintBlue 20vt '97
Prev.:Coupe16v'94,Alfa156/33,MareaSW,2xPunto,2xUno
Re: Engine Noise - Dead or not? Advice needed (vids) [Re: ] #1617891
26/03/2018 21:00
26/03/2018 21:00
Joined: May 2014
Posts: 179
kent
moonie Offline
On a journey
moonie  Offline
On a journey

Joined: May 2014
Posts: 179
kent
Go give it the Italian road test lol

Re: Engine Noise - Dead or not? Advice needed (vids) [Re: ] #1617902
27/03/2018 06:05
27/03/2018 06:05
Joined: Oct 2010
Posts: 77
Denmark
mli Offline
Reaping the fruits
mli  Offline
Reaping the fruits

Joined: Oct 2010
Posts: 77
Denmark
Yep moon smile Will do Thursday.

If it's actually oil channels that are a bit restricted by sludge then maybe I should try putting a cleaning agent in the oil?
I watched some videos of people (us guys) trying cleaning agent in oil when having noisy valves/tappets. It worked for some of them.
Does anyone have experience with this? (Some states there's a risk of overfilled filter hence sending debris around filter through by-pass)

M


SprintBlue 20vt '97
Prev.:Coupe16v'94,Alfa156/33,MareaSW,2xPunto,2xUno
Re: Engine Noise - Dead or not? Advice needed (vids) [Re: ] #1617937
27/03/2018 19:33
27/03/2018 19:33
Joined: Oct 2010
Posts: 77
Denmark
mli Offline
Reaping the fruits
mli  Offline
Reaping the fruits

Joined: Oct 2010
Posts: 77
Denmark
Hi guys

Further updates:

Tried oil system cleaning: warm idle oilpressure went up to 1.9-2.0bar - nice. (From 1.5bar before)
Did not change clacking/knocking noise though...

But I timed when noise starts (at idle):
At cold start: various noise incl clacking
After 3mins: begins going silent
After 10mins: clacking slowly begins.

Another finding:
Warm engine- noise is there: when I pull out cyl3 ignition coil then noise is muted significantly (although still there)

Listen/watch here:
Cold start with various noise:
coldstartnoise
After 3-4mins getting quiet:
after8mins
When warm - notice when cylinder 3 disconnect:
noise warm

So, I tend to think that I have 'piston slap' ? eg due to a bent rod :-( so this only give noise on exhaust stroke... (Hence at half engine speed)
@graham: like yours?

I'm not really happy though :-(

Last edited by mli; 27/03/2018 19:38.

SprintBlue 20vt '97
Prev.:Coupe16v'94,Alfa156/33,MareaSW,2xPunto,2xUno
Re: Engine Noise - Dead or not? Advice needed (vids) [Re: ] #1617939
27/03/2018 19:40
27/03/2018 19:40
Joined: Oct 2010
Posts: 77
Denmark
mli Offline
Reaping the fruits
mli  Offline
Reaping the fruits

Joined: Oct 2010
Posts: 77
Denmark
Hi guys

Further updates:

Tried oil system cleaning: warm idle oilpressure went up to 1.9-2.0bar - nice. (From 1.5bar)
Did not change clacking/knocking noise though...

But I timed when noise starts (at idle):
At cold start: various noise incl clacking
After 3mins: begins going silent
After 10mins: clacking slowly begins.

Another finding:
Warm engine- noise is there: when I pull out cyl3 ignition coil then noise is muted significantly (although still there)

Listen/watch here:
Cold start with various noise:
coldstartnoise
After 3-4mins getting quiet:
after8mins
When warm - notice when cylinder 3 disconnect:
noise warm

So, I tend to think that I have 'piston slap' ? eg due to a bent rod :-( so this only give noise on exhaust stroke... (Hence at half engine speed)
@nigel: like yours?

I'm not really happy though :-(


SprintBlue 20vt '97
Prev.:Coupe16v'94,Alfa156/33,MareaSW,2xPunto,2xUno
Re: Engine Noise - Dead or not? Advice needed (vids) [Re: ] #1617940
27/03/2018 20:04
27/03/2018 20:04
Joined: Dec 2005
Posts: 3,732
Pothole City
GrahamL Offline
Forum is my job
GrahamL  Offline
Forum is my job

Joined: Dec 2005
Posts: 3,732
Pothole City
Mine sounds like this and it's just a noisy tappet:

http://sendvid.com/mbumb1uc

If mine is left idling for a long time the tappet gets noisy like that but after a few mins of normal driving it's OK again. Fine from cold start too unless it's been left standing for weeks, but most coupes have noisy tappets then.

If your noise is going away with high revs but appearing again within a few secs of idling then it may not just be a tappet, as a tappet shouldn't be draining that quickly unless it has a major problem.

Re: Engine Noise - Dead or not? Advice needed (vids) [Re: ] #1617977
28/03/2018 21:45
28/03/2018 21:45
Joined: Jan 2018
Posts: 55
Teresopolis
SVC Offline
Reaping the fruits
SVC  Offline
Reaping the fruits

Joined: Jan 2018
Posts: 55
Teresopolis
Try to measure the compression of each cylinder.

You should get something about 150 psi or 10 bar.

Differences between cylinders greater than 20% is not good.

This test will tell you if your engine have a bad gaskets and/or bent rod/pin.

Here is a how to, just in case

Re: Engine Noise - Dead or not? Advice needed (vids) [Re: ] #1619821
02/05/2018 17:03
02/05/2018 17:03
Joined: Oct 2010
Posts: 77
Denmark
mli Offline
Reaping the fruits
mli  Offline
Reaping the fruits

Joined: Oct 2010
Posts: 77
Denmark
Hi Guys.

Sorry for the silence - I had to fix some stuff in the garden/house...

@graham: you're right - with functional tappets they should stay 'full' after first running in. And when I checked last time they were all firm (rocker cover off and pushed each with a plastic pin).

@ SVC: My plan was to check compression on all cylinders this week - but ran short of time frown

Other news:
I gave it a good italian road test Monday :-)
I seem to have power.
But I noticed a couple of times: when accelerating modestly I seem to hear clacking/knocking noise following revs - indicating trouble...

So, a couple of theories:

1. bent rod on cylinder 3
-> seems valid as I can hear reduction of noise when removing coil on #3
-> need to confirm with compression test

2. lazy valve (i.e. having trouble returning completely to seat)
-> no experience with this - but cant understand how the cold start scenario fits with this (noise - silent - then noise; see above)
-> this would require head off to check I guess :-/

3. loose/spongy tappets
-> I don't believe in this theory anymore.

BTW:
Went for Danish MOT today - my CO was now ok (failed last time - I believe its because I replaced injector on cylinder 1).
However the car failed on airbag lamp on :-(
(not allowed in DK apparently)

Cheers,
M

Last edited by mli; 02/05/2018 17:05.

SprintBlue 20vt '97
Prev.:Coupe16v'94,Alfa156/33,MareaSW,2xPunto,2xUno
Re: Engine Noise - Dead or not? Advice needed (vids) [Re: ] #1635333
07/09/2019 14:47
07/09/2019 14:47
Joined: Oct 2010
Posts: 77
Denmark
mli Offline
Reaping the fruits
mli  Offline
Reaping the fruits

Joined: Oct 2010
Posts: 77
Denmark
Hi All

Continuing an old story...

Im trying to get ready to disassemble the engine...
But maybe someone could give last advice?

Short recap: first i had engine full stop after overheating (bad temp switch?) - which gave blown head gasket (head bent).
Head replaced (used) and new gasket.
Running ok w good power but the issue is a clacking noise at half engine rpm. Not present when warm above 1500rpm.
Noise gets vague if cyl 3 ign coil disconnected.
Seems to come mostly from topend center (around #3).
All 20 tappets disassembled cleaned and oiled. All hard.
Oil pressure 1.9-2.0bar hot idle acc to dash gauge.

Compression test:
#1: 11.5/11.6
#2: 11.4/11.6
#3: 11.2/11.5
#4: 11.0/11.3
#5: 11.5/11.9
Pretty decent and low variance?

Should I go for new crank bearings?
Or piston slap? (Which means all out I guess?)

Cheers
M


SprintBlue 20vt '97
Prev.:Coupe16v'94,Alfa156/33,MareaSW,2xPunto,2xUno
Re: Engine Noise - Dead or not? Advice needed (vids) [Re: Anonymous] #1638612
23/01/2020 23:17
23/01/2020 23:17
Joined: Oct 2010
Posts: 77
Denmark
mli Offline
Reaping the fruits
mli  Offline
Reaping the fruits

Joined: Oct 2010
Posts: 77
Denmark
Hi all

My contribution here havent been the best - sorry.
I hope you might still want to join thread anyway.
Old story of my sprint that has been standing still a lot due to this issue (luckily inside my moms big garage).

Short recap:
first I had engine halt after overheating (bad temp switch?) - which gave a blown head gasket (& head slightly bent).
Head was replaced (used) with new head gasket.

Issue:
Running ok w good power but the issue is a (metallic) clacking noise (Audio files above).

Observations:
Frequency of noise is corresponding to half engine RPM (determined from PC audio analysis).
Clacking is not present when warm and running above 1500rpm - Reappearing 2-3sec after returning to idle.
Audible but vauge when accelerating modestly.
Noise gets vague if cyl 3 ignition coil is disconnected.
Seems to come mostly from center (around cyl #3) at top end - but can be heard from below.
Oil pressure 1.9-2.0bar hot idle acc to dash gauge - 3bar at 1500rpm+.

...
Actions done:
Oil system cleaning - rechanging oil a couple of times afterwards (and filter).
All 20 valve tappets were disassembled, cleaned and oiled - all are hard now.
Compression test showed its fairly equal on all cyls (within ~5% variation).

Latest:
I removed the sump (d*** what a bitch - not least because of A/C piping :-/ )
And then removed rod caps & bearings - carefully noting position and orientation.
BTW: (plastic) bushing for oil dipstick was damaged - seems hard to get a new one...

...
Theories:

a) Bent rod (cyl#3) -> piston slap
. I guess there would be bad compression on the relevant cyl?

b) loose pin (cyl#3) -> piston slap
. I can NOT feel any vertical play when pushing/pulling (any) rod from below...
. but I can tilt the piston(s) sideways ('quite a bit') perpendicular to pin axis...
(they move nicely along pin axis as they should)
. I can see a bit of scoring in cyl#3:
click to enlarge
. but I would have expected this was a 'broader area' at lowest end of cyl?

c) Exhaust leak - eg from poorly assembled ex-manifold?
. I guess this wont change with temp? (nor dissappear with higher rpm?)

d) Bad (con) rod bearings?
. I dont think they look totally bad:
click to enlarge
although there are signs of dirt in oil + one withoil starvation? + one with strange 'middle wear'.
. Maybe one of them (eg cyl#3) could be smashed from water in chamber?
but I forgot to check vertical play of pistons before removing all rod bearings :-/

e) Bad main (crank) bearings
. ? - I have not taken these off yet...

f) Loose valvepin (cyl#3)? (lazy?) -> knocked by tappets (cam)
. maybe - I did not disassemble the head before mounting :-/
. but I guess this would NOT change with RPM/oil pressure?

g) Bad sparkplug (cyl#3) - giving unwanted detonation
. I guess this would NOT change with RPM/oil pressure?
. I do have carbon build up in cyl#3 - quite a bit compared to when head was changed
click to enlarge
click to enlarge

h) bad injector? giving unwanted detonation
. this would also affect power, idle etc?
. I guess this would NOT change with RPM/oil pressure?

i) a tappet that can tilt slightly in 'housing'-> clacking on sidewall when hit by cam
. I could try to exhange tappets btw cylinders...

Comments / suggestions welcome:-)
Thx M


SprintBlue 20vt '97
Prev.:Coupe16v'94,Alfa156/33,MareaSW,2xPunto,2xUno
Re: Engine Noise - Dead or not? Advice needed (vids) [Re: mli] #1638614
24/01/2020 07:15
24/01/2020 07:15
Joined: Feb 2017
Posts: 104
Tasmania
G
Grigio Offline
Club member 1604
Grigio  Offline
Club member 1604
On a journey
G

Joined: Feb 2017
Posts: 104
Tasmania
Originally Posted by mli
b) loose pin (cyl#3) -> piston slap
. I can NOT feel any vertical play when pushing/pulling (any) rod from below...
. but I can tilt the piston(s) sideways ('quite a bit') perpendicular to pin axis...
(they move nicely along pin axis as they should)
. I can see a bit of scoring in cyl#3:
click to enlarge
. but I would have expected this was a 'broader area' at lowest end of cyl?


There is obvious heat colouring on the piston that corresponds with the scoring of the bore. That piston should come out to determine the cause. Broken ring is my call.


2000 grigio moon 20VT Plus.
Re: Engine Noise - Dead or not? Advice needed (vids) [Re: Anonymous] #1638617
24/01/2020 09:24
24/01/2020 09:24
Joined: Sep 2006
Posts: 15,002
FCSS 01684 593187
Countrycruising Offline
Club Rep Europe, member 914
Countrycruising  Offline
Club Rep Europe, member 914
Forum veteran

Joined: Sep 2006
Posts: 15,002
FCSS 01684 593187
It could be detonation due to a failing injector, if it overheats the ring it'll drag down the cylinder as shown in your underside picture.

Re: Engine Noise - Dead or not? Advice needed (vids) [Re: Anonymous] #1638651
24/01/2020 22:55
24/01/2020 22:55
Joined: Oct 2010
Posts: 77
Denmark
mli Offline
Reaping the fruits
mli  Offline
Reaping the fruits

Joined: Oct 2010
Posts: 77
Denmark
Thanks Guys

@grigio: yes - I noticed that as well frown I hope its not too much to save the cylinder-wall...
How would you explain the change of noise acc to engine temp?
- cold start:some clacking - after 4mins: almost silent - hot idle: more clacking...
I had a feeling that the silent phase was due to 'full oil supply at medium viscosity'
- then when oil gets warmer/thinner it changes.
Is this a matter of thermal expansion of cylinder vs (broken) ring?
Or maybe a combination with something else?

@CC: I should have tried to switch both sparkplugs and injectors btw cylinders before disassembly :-/
Would detonationchange with temp? (prominent->almost->more prominent)

..
Any comments to the condition of the rod bearings?
It seems theres dirt - maybe from poor assembly of head :-/ This would call for proper re-build...

BTW: Mileage: ~182000km

Cheers
M


SprintBlue 20vt '97
Prev.:Coupe16v'94,Alfa156/33,MareaSW,2xPunto,2xUno
Re: Engine Noise - Dead or not? Advice needed (vids) [Re: Anonymous] #1639057
10/02/2020 22:37
10/02/2020 22:37
Joined: Oct 2010
Posts: 77
Denmark
mli Offline
Reaping the fruits
mli  Offline
Reaping the fruits

Joined: Oct 2010
Posts: 77
Denmark
Hi guys

Update:
Now I have exchanged both rod-bearings and main bearings in situ (after checking old gap with plastigauge).
(top main bearing shell #1 and #6 were hard to get out just put pushing with fingers/plastic-bit
- I guess they're loaded by flywheel and stuff. So I used a cut-down 'head' of a cable-tie and pushed it into the
oilhole on the crank and then turned the crank; and voila it pushes out the top shell...)

Note: Main bearing #1 is looking like rod-bearing on cyl1 - signs of dirt and a bit extra wear.
But they're not totally bad...

Anyway: after assembly and starting up the engine: the knocking/tapping sound is still there :-(
So theory d & e can be removed from the list.
Theory g & h can be checked now when engine is running (swap btw cylinders)
Theory a + b still to be checked... (engine disassembly)

When checking sound carefully now, it also feels like its mostly coming from 'middle of the engine' - higher sounds here than below engine...
And it is quite harsh 'metallic' sound.

Re. theory i) tappet tilt: I dont think I can feel any sideways play on tappets (with cams in place) - need to check w/o cams I guess.
(vetical play is non-existant - I can not get a 0,05mm 'blade' in btw tappet and cam-lobes...)

New theory j): (partially) blocked oilway for tappet(s) - but today it was almost totally silent after 3-4mins running - so not likely.

New theory k): one of the tappets is too small in Ø ? i.e. it cant be filled properly when oil is hot because oil leaks around it.
When oil is cold this gives enough resistance to fill tappet?
This support the symptoms: sound prominent at cold start -> almost silent after a few mins -> sound prominent when oil//engine hot.

(Or is one of the tappets still bad - even after disassy and cleaning? :-/ )

BTW: this whole sump removal and refitting feels more painful/cumbersome that timing-belt change IMHO :-(
I had to cut/disassemble the power-steering lines and 'bend' them out of the way
- and I removed exhaust from turbo as well (i.e. lambda sensor off).

Cheers
M


SprintBlue 20vt '97
Prev.:Coupe16v'94,Alfa156/33,MareaSW,2xPunto,2xUno
Re: Engine Noise - Dead or not? Advice needed (vids) [Re: Anonymous] #1639061
11/02/2020 08:56
11/02/2020 08:56
Joined: Sep 2006
Posts: 15,002
FCSS 01684 593187
Countrycruising Offline
Club Rep Europe, member 914
Countrycruising  Offline
Club Rep Europe, member 914
Forum veteran

Joined: Sep 2006
Posts: 15,002
FCSS 01684 593187
So a quick recap, you've stripped this engine, head off and pistons out for a full inspection of the rods, ring valleys etc, rebuilt and still makes that knocking noise when hot as posted in the sound wave 23/03/18?

What was found and resolved for the scuffing on the cylinder bore. piston etc?

Re: Engine Noise - Dead or not? Advice needed (vids) [Re: Anonymous] #1639080
11/02/2020 22:24
11/02/2020 22:24
Joined: Oct 2010
Posts: 77
Denmark
mli Offline
Reaping the fruits
mli  Offline
Reaping the fruits

Joined: Oct 2010
Posts: 77
Denmark
Thanks CC

No sorry :-/ since the images from underneath 23.jan-2020 (sump off) I only replaced bearings - Im not moving that fast... :-/
In 2010: blown gasket - full stop.
The (used) head replacement was in 2011 - after this the (clacking/knocking) noise came immediately
(and the car was sitting there for some years \ no money&time).
In march 2018 I disasssembled, cleaned and reinstalled all tappets - same noise. Pause in 2019...
Here in Jan'20 I decided to open sump and look at bearings (since I didnt find issues with tappets) - and then realised the scuffing on Cyl3 seen above.
After main/rod bearing replacement still same noise.

I will need to take the engine apart to deal with scuffing... However I would like to (try to) ensure that the cause of the noise is not somewhere else before I do that.

Cheers
M


SprintBlue 20vt '97
Prev.:Coupe16v'94,Alfa156/33,MareaSW,2xPunto,2xUno
Re: Engine Noise - Dead or not? Advice needed (vids) [Re: Anonymous] #1639082
11/02/2020 23:00
11/02/2020 23:00
Joined: Dec 2005
Posts: 3,732
Pothole City
GrahamL Offline
Forum is my job
GrahamL  Offline
Forum is my job

Joined: Dec 2005
Posts: 3,732
Pothole City
I still think it might be a partially blocked oilway in the head. Have you tried an aggressive oil flush like BG EPR ?

Re: Engine Noise - Dead or not? Advice needed (vids) [Re: Anonymous] #1639088
12/02/2020 10:19
12/02/2020 10:19
Joined: Sep 2006
Posts: 15,002
FCSS 01684 593187
Countrycruising Offline
Club Rep Europe, member 914
Countrycruising  Offline
Club Rep Europe, member 914
Forum veteran

Joined: Sep 2006
Posts: 15,002
FCSS 01684 593187
To be honest I think you're that far in to this the only way to truly ascertain what's going on is completely strip the engine and inspect everything meticulously,you could spend another year chasing your tail without any answers, and the scored bore is already an issue that needs dealing with so a weekends work and I bet the problem will become apparent.

Re: Engine Noise - Dead or not? Advice needed (vids) [Re: Anonymous] #1639106
12/02/2020 21:34
12/02/2020 21:34
Joined: Oct 2010
Posts: 77
Denmark
mli Offline
Reaping the fruits
mli  Offline
Reaping the fruits

Joined: Oct 2010
Posts: 77
Denmark
@ graham: I think the 'OSC' I used was probably a more 'normal' one... I dont know about BG EPR - seems it could be a good option. I was actually going to try to 'blow air' into oilways supplying suspected cylinders/tappets...
I hope the stuff BG EPR 'releases' goes in my oilfilter and not into the new bearings...

@CC: yes you're right - I already spent too much time on error hunting. and cyl 3 piston/rings needs to be inspected. As said 'strip' is my main next step...

Thanks for support.

Cheers
M


SprintBlue 20vt '97
Prev.:Coupe16v'94,Alfa156/33,MareaSW,2xPunto,2xUno
Page 2 of 2 1 2

Powered by UBB.threads™ PHP Forum Software 7.7.1
(Release build 20190129)
PHP: 7.3.12 Page Time: 0.045s Queries: 15 (0.027s) Memory: 0.8856 MB (Peak: 1.0948 MB) Data Comp: Off Server Time: 2020-02-18 07:20:46 UTC