Pelican Parts

Bad sound from engine.....

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2 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHBad sound from engine.....

Leading reported evidence

Check filter no metal, sent samples

Performed · outcome unconfirmed

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

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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
Changed the oil every 5,000 miles checked the filter no metal, sent samples to Blackstone they said everything thing looked good.
Original post Read captured discussion
Bad sound from engine.....

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Leading evidence: 'Check filter no metal, sent samples' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check filter no metal, sent samples' (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.

Read captured replies

1 matching discussions · 2 captured posts examined · 0 partial discussions

Compare 1 other evidence results

Replace oil every 5,000 miles

Performed · outcome unconfirmed

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

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
Changed the oil every 5,000 miles checked the filter no metal, sent samples to Blackstone they said everything thing looked good.
Original post Read captured discussion
Bad sound from engine.....

Frequently discussed actions (2)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

Check filter no metal, sent samples

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

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
Changed the oil every 5,000 miles checked the filter no metal, sent samples to Blackstone they said everything thing looked good.
Original post Read captured discussion
Bad sound from engine.....

Replace oil every 5,000 miles

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

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
Changed the oil every 5,000 miles checked the filter no metal, sent samples to Blackstone they said everything thing looked good.
Original post Read captured discussion
Bad sound from engine.....

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.

2 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.

Pelican Parts: 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: 20261026T163944Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Hello, new to the forum have been lurking for a little while and found some good info. Now down to the issue at hand, I have 1999 C4 with 118000 miles. I have had the car for a year now and it is my daily and I put about 140 miles round trip a day, which equates to around 20,000 in that year. Except for a couple cv boots and window regulators it has been trouble free. Changed the oil every 5,000 miles checked the filter no metal, sent samples to Blackstone they said everything thing looked good. No smoking, no real oil usage to speak of. After a roughly 200 mile drive parked the car with no issues, but the next day I started the car to move it in the driveway and upon starting it made a loud hollow knocking sound! The sound quietened down considerably after a few seconds but did not totally disappear. I moved the car and shut it off. Had an appointment so had to go (of course thinking about nothing but my car!) I have briefly started it a couple of times since with no trace of the knocking and even a few light revs there is no noise. Getting ready to drain oil and check filter again and do a lab it is coming up on 5,000. Possibly going to drop the sump pan and have a poke around. Sorry for the long and drawn out post but If anybody might have an idea it would be much appreciated! Thanks in advance. PS. I need my 911 back!

POST 2Original post

Possible causes: belt idel bearings (3 of them) chain tensioner L/R IMS bearing I would not start it again, until you verify what is causing the noise. Good luck.

This is a source reference. Confirm exact model applicability in the original material.