Planet-9

Should I be worried?

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9 captured repliesPartial discussion capture · Source accounts, not a confirmed diagnosis

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YOUR RESEARCHShould I be worried?

Leading reported evidence

Replace oil

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Discussions that performed work without a confirmed outcome: 1

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I last changed the oil with 5W40 full synthetic
Original post Read captured discussion
Should I be worried?

Frequently discussed work

Check exhaust bolts, both the ones holding the headers

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Suggestion
You might check the exhaust bolts, both the ones holding the headers to the engine, and the ones at exhaust couplings.
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Should I be worried?

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Leading evidence: 'Replace oil' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check exhaust bolts, both the ones holding the headers' (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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Run littler hard

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I know there are a number of videos online that have similar noise and are referring to a sticky valve, but seems strange that this happens after I run her a littler hard.
Original post Read captured discussion
Should I be worried?

Use cast pistons (as opposed

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Discussions that performed work without a confirmed outcome: 1

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The 2.7s used cast pistons (as opposed to forged in the 3.4) and from my understanding, this is the primary cause.
Original post Read captured discussion
Should I be worried?

Check exhaust bolts, both the ones holding the headers

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Unsuccessful attempts: 1
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Suggestion
You might check the exhaust bolts, both the ones holding the headers to the engine, and the ones at exhaust couplings.
Original post Read captured discussion
Should I be worried?

Frequently discussed actions (4)

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

Check exhaust bolts, both the ones holding the headers

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
You might check the exhaust bolts, both the ones holding the headers to the engine, and the ones at exhaust couplings.
Original post Read captured discussion
Should I be worried?

Replace oil

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
I last changed the oil with 5W40 full synthetic
Original post Read captured discussion
Should I be worried?

Run littler hard

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
I know there are a number of videos online that have similar noise and are referring to a sticky valve, but seems strange that this happens after I run her a littler hard.
Original post Read captured discussion
Should I be worried?

Use cast pistons (as opposed

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
The 2.7s used cast pistons (as opposed to forged in the 3.4) and from my understanding, this is the primary cause.
Original post Read captured discussion
Should I be worried?

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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.

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

Planet-9: 1 discussions

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Generation: 20261027T022239Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1Original post

I've noticed a little knocking sound at idle after some mildly spirited driving. Is this a normal sound or should I be worried?

POST 2Original post

Vehicle model? Year? Mileage? Have you ever done a used oil analysis (eg Blackstone)? That's where I would start. What oil weight are you using. And, where are you located?

POST 3Original post

Its a 2005 Base Boxster with 92K miles. I last changed the oil with 5W40 full synthetic Mobil 1 . I'm located in Southern California and have never used an oil analysis service. I know there are a number of videos online that have similar noise and are referring to a sticky valve, but seems strange that this happens after I run her a littler hard. This is a weekend car and I maybe put 1500 miles on per year, but hoping this isn't anything abnormal.

POST 4Original post

[Image-only or quote-only post; no author-written text.]

POST 5Original post

I had a slight knocking sound from not properly tightened spark plugs , it only happened once the engine was warm. Did you replace them recently? Besides of the lifters that's another thing to look at.

POST 6Original post

I replaced them about 1k miles ago. I suppose I can check them.

POST 7Original post

I'll just comment that for all the talk of a lifter noise (not only here, but on Facebook Porsche threads) - not once have I seen anyone report back that their noise actually WAS a noisy lifter. And I've been here for a while and seen a lot of threads like this. Unfortunately - the usual result is bore score, particularly on pre-2009 cars. You might check the exhaust bolts, both the ones holding the headers to the engine, and the ones at exhaust couplings. Those could - if one is loose or missing - cause a noise that is only evident after hard driving, where the exhaust gets hot enough to expand a bit. This is a higher probability than a loose spark plug (although, as mentioned, that has happened).

POST 8Original post

Thanks for the responses. With what I've read bore scoring isn't much of a risk on the base 2.7 motors. I suppose anything is possible. Im hoping to get some time this weekend and will attenpt to verify the exhaust bolts and plugs tightness.

POST 9Original post

I don't believe there are any known cases of bore scoring on the 2.7s, end of. The 2.7s used cast pistons (as opposed to forged in the 3.4) and from my understanding, this is the primary cause. I would not worry yourself that this could be bore scoring until you get more conclusive evidence beyond any noises that you're hearing.

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