Porsche Club GB

cold engine start up chatter

Add to repair workspace

New repair projectOpen repair workspace

Original source

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

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHcold engine start up chatter

Leading reported evidence

Test driving 996s

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
One thing I noticed when test driving 996s before I purchased was that when engines are cold there is a chatter for a couple of seconds when started.
Original post Read captured discussion
cold engine start up chatter

Read full discussion summary

Leading evidence: 'Test driving 996s' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Test driving 996s' (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 · 6 captured posts examined · 0 partial discussions

Compare 1 other evidence results

Use 5w-40 oil almost eliminated it

Suggestion or failed attempt

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 · Original poster
I found that using a 5W-40 oil almost eliminated it on mine.
Original post Read captured discussion
cold engine start up chatter

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.

Test driving 996s

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
One thing I noticed when test driving 996s before I purchased was that when engines are cold there is a chatter for a couple of seconds when started.
Original post Read captured discussion
cold engine start up chatter

Use 5w-40 oil almost eliminated it

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 · Original poster
I found that using a 5W-40 oil almost eliminated it on mine.
Original post Read captured discussion
cold engine start up chatter

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.

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

Porsche Club GB: 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: 20261026T191851Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Very common. I found that using a 5W-40 oil almost eliminated it on mine.

POST 2Original post

One thing I noticed when test driving 996s before I purchased was that when engines are cold there is a chatter for a couple of seconds when started. I presume that is purely because oil has not circulated yet but is it normal on all water or air cooled 911s? For such a nice motor, it does take away from it slightly. No issue when engine is warm. Any comments?

POST 3Original post

Thanks Richard - is this on 993s (and older) and 997s too ? or specific to 996s?

POST 4 / ORIGINAL POSTEROriginal post

I think all 996/997's do it to a certain extent - some more noticably than others. I can't recall my 993 doing it - the engine is a completely different design - but it wouldn't surprise me if some did. If it only lasts a second or two, don't worry about it.

POST 5Original post

yes, only 1-2 seconds and not at all when engine is warm. It's just more annoying than anything and not what you would expect from such a motor.

POST 6Original post

On conventional engines it tends to be because the oil drains out of the cylinder head when the engine is off and it takes a few seconds upon startup for the hydraulic tappets to pressurise. I guess you could be seeing a similar effect. As far as I can glean it isn't a problem as such as the engine should be designed to accommodate this effect. Sounds nasty though. The 5w oil being slightly thicker when cold probably means the oil doesn't quite drain away fully and so pressurises almost instantly when started.

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