15 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHWoodpecker In Engine - Mystery Sound After Rebuild
Reported or suspected cause
loose bolts
Reported cause
No successful repair reported for this finding.
1
Identified cause
0
Suspected cause
0
Reported fixes
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that report identifying a cause
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Reported cause
It turned out to be loose bolts on the power steering pump pulley.
Woodpecker In Engine - Mystery Sound After Rebuild
Read full discussion summary
Leading evidence: 'loose bolts' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'loose bolts' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Check those' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed · Original poster
I�ll leave the engine builder out of this, but the reason is they are in another state and I installed the engine myself.
Woodpecker In Engine - Mystery Sound After Rebuild
Replace 8000 miles ago
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed · Original poster
The same cams and lifters were used and major wear parts like the chain and chain guides were replaced 8000 miles ago.
Woodpecker In Engine - Mystery Sound After Rebuild
Check those
Suggestion or failed attempt
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Woodpecker In Engine - Mystery Sound After Rebuild
Use automotive stethoscope
Suggestion or failed attempt
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
Use a automotive stethoscope to locate the point where the noise is coming from.
Woodpecker In Engine - Mystery Sound After Rebuild
Use mechanics stethoscope
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
I would use a Mechanics Stethoscope to listen to the Purge Vent Valve...to see is it was the noise source...I can't think of any other PWM solenoids at the moment, but I'll think on it..
Woodpecker In Engine - Mystery Sound After Rebuild
Coverage and how to read this overview
Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
15 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261026T113718Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Hi Everyone -
i�m looking for some help to identify this knocking/ticking sound. This is a freshly rebuilt engine, it�s a 3.8 L with Nickies. It was just rebuilt 8000 miles ago, but since the rings wouldn�t seat, we had to rebuild it again. The same cams and lifters were used and major wear parts like the chain and chain guides were replaced 8000 miles ago.
i�ve just done my first hundred miles of break-in with BR 40 break-in oil. upon returning from my second trip out. I noticed an isolated ticking at idle that was ticking at about two tick per second. Strangely, even though the idle stayed the same the ticking sped up to about four or five ticks per second. If I rev the engine, they slow back down, but then climb again, even though the idle stays steady.
Here�s a link to a video. You have to listen carefully for the ticking over the exhaust. Note that you can�t hear this from outside of the car, you don�t hear it under the car or to the side of the car, you can only hear it inside the car so it sounds like it is at the top of the engine and towards the front of the engine that connects to the transmission.
YouTube Video Link
Anyone have any ideas?
Sounds like a lifter...
Use a automotive stethoscope to locate the point where the noise is coming from.
Who did the engine work?
Why haven't they addressed the issue?
I can tell you that from the rhythm it's not something serious, not an internal engine noise.......ie. not a lifter or rod bearing or piston noise...
Sounds like a solenoid noise in PWM..( Pulse Width Modulation ) ......
I would use a Mechanics Stethoscope to listen to the Purge Vent Valve...to see is it was the noise source...I can't think of any other PWM solenoids at the moment, but I'll think on it..
I had a tick that appeared after an engine rebuild. It turned out to be loose bolts on the power steering pump pulley. You might check those. It would be an easy fix. Hope this helps.
Mark
Thanks for the post and idea, Mark, but the key point here is the ticking starts slow and then speeds up at constant idle. I think Skip is on the right path.
The way I locate an engine noise is with a hose stuck to my ear and the other end wandering around the engine area. That will get you the source of the noise.
You can also amplify the noise by sticking a small funnel to the hose end and cup the funnel over your ear. That works really well and very directional.
I can vouch for yelcab's hose listening device. I have always kept a Stethoscope AND a 5ft long 3/8 rubber hose in my tool box for tracking down engine noises..
The Stethoscope works well for "internal noses" like solenoids, A/c bearings, alternator, water pump,idler pulley bearings, lifters, rod bearings, pistons,, pretty much any metallic noise that transfers through metal..
The hose listening device is great for exhaust leaks, whistles, air leaks, but also great for getting in the location/source of any audible noise..( the closer you get the open end of the hose, the louder it will be)
But like any "tool" they are only as good as the person using them...
