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Valve lifter carrier ovality

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YOUR RESEARCHValve lifter carrier ovality

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Replace lifter carrier

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Unsuccessful attempts: 1
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Suggestion
Unless you are adept at measuring small bores/tapers/etc, and have the appropriate equipment to do so, I'd replace the lifter carrier for the $5-600 it cost.
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Valve lifter carrier ovality

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Leading evidence: 'Replace lifter carrier' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace lifter carrier' (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 lifter carrier

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

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Discussions that contain suggestions: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

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Suggestion
Unless you are adept at measuring small bores/tapers/etc, and have the appropriate equipment to do so, I'd replace the lifter carrier for the $5-600 it cost.
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Valve lifter carrier ovality

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

Rennlist: 1 discussions

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Generation: 20261026T144035Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

I am measuring the ovality / roundness of a 996.1 engine. So far, what I have is they are either perfectly matched, or 0.001 (inch) out on the 6-12 o'clock position. Should I consider that 0.001 ovality inch in spec? Actual numbers are 1.3000 to 1.3010 inch. (that looks like 33mm nominal specs)

POST 2Original post

I don't know what the 3.6 specs. is, in the flat tappet lifters we kept it to .001 to .0015 max. in the engine from 4.5 L to 80 L engines..

POST 3Original post

Did you also measure for taper in the lifter bores? If so, what did you find? I will be replacing intake lifters in my car soon and can't really seem to find any data on taper and ovality. Curious to see what you come up with.

POST 4Original post

Quotes source post: 20082875

Unless you are adept at measuring small bores/tapers/etc, and have the appropriate equipment to do so, I'd replace the lifter carrier for the $5-600 it cost. As the lifters alone are very very expensive. And you'd want them to operate at their best,, not leaking excess oil pressure filling up the head with needed sump oil... jmo

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