C3 ticking / knocking sound.
Le Mans Master
Joined: Apr 2011
Posts: 6,284
Likes: 1,171
From: Hermosa
When I want to stop the crank from turning to take off crank accessories I use rope in the spark plug hole.
you should be able to run the engine and see if the pulley or harmonic balancer is wobbling. I'm thinking IF this is the problem that it's striking the timing chain cover as it rotates? Or the pulley is wobbling striking the balancer and making the noise?
We've eliminated all accessories as suspects by removing belts.
I would temporarily remove the flexplate/torque converter sheet metal guard just to eliminate that as a source.
A main bearing is usually a grumbling deep down sound vs a knock or tick, so it sounds like that's out.
seems to keep coming back to valve train if it's not crank related.
This engine was rebuilt so... what if the cam sprocket is coming loose? I've never hear that sound, but WTH we got noting to lose.
And if you go there make sure the chain is not all stretched out and slapping the timing cover.
you should be able to run the engine and see if the pulley or harmonic balancer is wobbling. I'm thinking IF this is the problem that it's striking the timing chain cover as it rotates? Or the pulley is wobbling striking the balancer and making the noise?
We've eliminated all accessories as suspects by removing belts.
I would temporarily remove the flexplate/torque converter sheet metal guard just to eliminate that as a source.
A main bearing is usually a grumbling deep down sound vs a knock or tick, so it sounds like that's out.
seems to keep coming back to valve train if it's not crank related.
This engine was rebuilt so... what if the cam sprocket is coming loose? I've never hear that sound, but WTH we got noting to lose.
And if you go there make sure the chain is not all stretched out and slapping the timing cover.
Last edited by REELAV8R; May 20, 2020 at 03:56 PM.
Thread Starter
Intermediate
Joined: May 2020
Posts: 46
Likes: 6
From: Netherlands
Thread Starter
Intermediate
Joined: May 2020
Posts: 46
Likes: 6
From: Netherlands
I would temporarily remove the flexplate/torque converter sheet metal guard just to eliminate that as a source.
This engine was rebuilt so... what if the cam sprocket is coming loose? I've never hear that sound, but WTH we got noting to lose.
And if you go there make sure the chain is not all stretched out and slapping the timing cover.
This engine was rebuilt so... what if the cam sprocket is coming loose? I've never hear that sound, but WTH we got noting to lose.
And if you go there make sure the chain is not all stretched out and slapping the timing cover.
I'm going to check the cam sprocket and the chain.
Le Mans Master
Joined: Sep 2001
Posts: 7,739
Likes: 630
From: Unreconstructed, South Carolina
Dumbazz here, but only way I KNOW to check flexplate for crack(s) is unbolt converter and pull flexplate out & inspect ... may have to pull trans aft/back to get flexplate out. Sometimes you can see the crack without pulling it, sometimes Not. Flexplates are cheap.
Also, as said, a busted spring's inner Damper as well ... Springs are even cheaper.
Also, as said, a busted spring's inner Damper as well ... Springs are even cheaper.
Thread Starter
Intermediate
Joined: May 2020
Posts: 46
Likes: 6
From: Netherlands
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Melting Slicks
Joined: Apr 2001
Posts: 3,399
Likes: 278
From: Olmsted Falls, Ohio
Reading this thread is like reading an Agatha Christie mystery.
Something is dying, all the usual suspects have been interviewed, Hercule Poirot and Miss Marple have been pondering, but no definite suspect has been found.
Something is dying, all the usual suspects have been interviewed, Hercule Poirot and Miss Marple have been pondering, but no definite suspect has been found.
Le Mans Master
Joined: Sep 2001
Posts: 7,739
Likes: 630
From: Unreconstructed, South Carolina
OP is Niederlander ... Poirot is Belgian ... perhaps OP's domiciled near Bruges ?
Race Director
Joined: Mar 2016
Posts: 14,406
Likes: 8,212
From: Napa Valley California
I know asking another exhaust question is beating a dead horse but,
How old are the headers?
Could there be a spot that has burned through?
Especially looking at the inside welds and where the primary tubes connect at the flanges and collectors?
How old are the headers?
Could there be a spot that has burned through?
Especially looking at the inside welds and where the primary tubes connect at the flanges and collectors?
Thread Starter
Intermediate
Joined: May 2020
Posts: 46
Likes: 6
From: Netherlands
I checked the exhaust on a bridge and there are absolutely no leaks.
Le Mans Master
Joined: Sep 2001
Posts: 7,739
Likes: 630
From: Unreconstructed, South Carolina
and Keep us posted with your findings ... this is about the longest dead-end road I can recall "traveling."