911uk

Engine rattles when cold

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

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHEngine rattles when cold

Leading reported evidence

Use less than 1 litre of oil in

Performed · outcome unconfirmed

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
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Discussions that performed work without a confirmed outcome: 1

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Performed · outcome unconfirmed
Mine has been doing that for at least the last 20,000 miles, and has used less than 1 litre of oil in that whole time, so I'm assuming it's not terminal...
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Engine rattles when cold

Frequently discussed work

Use castrol slx 0-30)

No successful repair reported for this finding.

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Reported fixes: 0
Unsuccessful attempts: 1
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Discussions that contain suggestions: 1

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Suggestion · Original poster
It seems to have got worse since my 48k major service (after the oil change using castrol SLX 0-30).
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Engine rattles when cold

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Leading evidence: 'Use less than 1 litre of oil in' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Use castrol slx 0-30)' (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.

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Use castrol slx 0-30)

Suggestion or failed attempt

No successful repair reported for this finding.

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Reported fixes: 0
Unsuccessful attempts: 1
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Discussions that contain suggestions: 1

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Suggestion · Original poster
It seems to have got worse since my 48k major service (after the oil change using castrol SLX 0-30).
Original post Read captured discussion
Engine rattles when cold

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.

Use castrol slx 0-30)

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
It seems to have got worse since my 48k major service (after the oil change using castrol SLX 0-30).
Original post Read captured discussion
Engine rattles when cold

Use less than 1 litre of oil in

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
Mine has been doing that for at least the last 20,000 miles, and has used less than 1 litre of oil in that whole time, so I'm assuming it's not terminal...
Original post Read captured discussion
Engine rattles when cold

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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.

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

911uk: 1 discussions

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Generation: 20261026T203514Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Hi I have had my 996 (1999) for one year now, but i have a problem? When I start my car first thing in the morning when it is cold it rattles for around 1 minute then goes away. It seems to have got worse since my 48k major service (after the oil change using castrol SLX 0-30). This problem has only started in the last six months. Can anyone shed any light on it cheers?

POST 2Original post

Oil to thin for the mileage???

POST 3Original post

Isnt that a normal feature of hydraulic tappets? The have a bit of a rattle on start up from cold.

POST 4Original post

I don't have the issue on my 996, but other owners have reported rattling on a cold startup. I believe this is not concidered to be a problem. I'm sure someone will be along soon to confirm or deny.

POST 5Original post

Mine has been doing that for at least the last 20,000 miles, and has used less than 1 litre of oil in that whole time, so I'm assuming it's not terminal... Not got noticeably worse or better in that time either...

POST 6Original post

My old 996 did this at startup. Never got better or worse.

POST 7Original post

I have a similar tappet noise on start up for few seconds Had the OPC check it (they had it over night) but they consider it normal. A minute seems a long time though - may be worth getting it checked

POST 8Original post

don't they all do that ?

POST 9Original post

Was what I was trying to suggest. :wink:

POST 10Original post

trying ? and if you own a 996 with PSE the problem sounds worse but isnt

POST 11Original post

My 996 doesn't sound like a bucket full of rusty nails on startup ... should I be worried

POST 12Original post

Mine doesn't but it's only got 2000 miles on it I used to remember putting in a tin of slick50 years ago(oil additive)... it's like monkey grease for trailers but wayyyyyy thicker. Engine never made a noise after that. :twisted:

POST 13Original post

as above, mine does it for a few seconds but a minute does seem a bit long. did it do it at all before service?

POST 14Original post

A mechanic that shall remain nameless said the sound was coming from the bottom of my engine... Wonder what he means - the bolts on the crankcase perhaps... :lol: :lol: :lol: Think his experience of boxer engines might be a bit limited, looking under the front lid for the engine was a bit of a hint (only joking!)

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