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Pelican Parts

chain tensioner, why different parts?

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4 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
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YOUR RESEARCHchain tensioner, why different parts?

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Install ones

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Performed · outcome unconfirmed · Original poster

Needless today, I was very careful to observe which way the old ones point and installed the new ones that way, but one side is now making a lot of clanking noise just like a tensioner not getting enough oil in it.

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chain tensioner, why different parts?
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Leading evidence: 'Install ones' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Install ones' (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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Replace two chain tensioners

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
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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 just replaced the two chain tensioners on my 997 Turbo.

Original post Read captured discussion
chain tensioner, why different parts?
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.

Install ones

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

Needless today, I was very careful to observe which way the old ones point and installed the new ones that way, but one side is now making a lot of clanking noise just like a tensioner not getting enough oil in it.

Original post Read captured discussion
chain tensioner, why different parts?

Replace two chain tensioners

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

I just replaced the two chain tensioners on my 997 Turbo.

Original post Read captured discussion
chain tensioner, why different parts?
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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.

4 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.

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Generation: 20261027T044418Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

I just replaced the two chain tensioners on my 997 Turbo. There are two different part numbers, and the parts look identical. Can someone tell me... 1. What are the differences between the two? 2. Which way does the nipple point, up or down on left, and on the right? Needless today, I was very careful to observe which way the old ones point and installed the new ones that way, but one side is now making a lot of clanking noise just like a tensioner not getting enough oil in it. The oil line on the left is attached to the top of the tensioner cover whereas the oil line on the right does not attach to the tensioner cover (which points down)

POST 2Original post

Post a picture of the 2 parts if you can, it'll be easier for members to give you details about them. -Dmitry

POST 3 / ORIGINAL POSTEROriginal post

Found my own answers. Bank 1, 1-3 Cyl, tensioner with the open nipple facing up, toward the cap where oil is pumped in. Bank 2, 4-6 Cyl, tensioner with the open nipple facing down, toward the cap where oil is pumped in. The difference in the two tensioners must be in the check valve to keep oil in while engine is off where gravity pulls one away from the opening or toward the opening.

POST 4Original post

Oil pressure is different in different parts of the engine

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