Pelican Parts

Any changes in 996 engine, 1999 vs later years?

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YOUR RESEARCHAny changes in 996 engine, 1999 vs later years?

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Replace (2006) courtesy of porsche

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Performed · outcome unconfirmed · Original poster
Just bought a 99 - 996 which had engine replaced (2006) courtesy of Porsche.
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Any changes in 996 engine, 1999 vs later years?

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Check block casting numbers

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Suggestion · Original poster
Also, does anyone know where i can check block casting numbers to find out what year this "new" engine might actually be?
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Any changes in 996 engine, 1999 vs later years?

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Leading evidence: 'Replace (2006) courtesy of porsche' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check block casting numbers' (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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Check block casting numbers

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Suggestion · Original poster
Also, does anyone know where i can check block casting numbers to find out what year this "new" engine might actually be?
Original post Read captured discussion
Any changes in 996 engine, 1999 vs later years?

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Check block casting numbers

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
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Read evidence and context

Discussions that contain suggestions: 1

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Suggestion · Original poster
Also, does anyone know where i can check block casting numbers to find out what year this "new" engine might actually be?
Original post Read captured discussion
Any changes in 996 engine, 1999 vs later years?

Replace (2006) courtesy of porsche

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
Just bought a 99 - 996 which had engine replaced (2006) courtesy of Porsche.
Original post Read captured discussion
Any changes in 996 engine, 1999 vs later years?

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

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

POST 1 / ORIGINAL POSTEROriginal post

Just bought a 99 - 996 which had engine replaced (2006) courtesy of Porsche. Would like to know if a 2006 engine (or later years 996) might have resulted in any improvements in reliability, hp, etc. Also, does anyone know where i can check block casting numbers to find out what year this "new" engine might actually be? Thanks.

POST 2Original post

I think the remanufacturered motors have a different ID number/sequence (at least I recall that from a Boxster engine discussion.) HP change? no. Reliability? perhaps.

POST 3Original post

Your replacement engine is almost surly a 3.4l just like the original was. In 2002 the 996 got a face lift and a bump in displacement to 3.6l producing 320hp (up from 300 for the 3.4)

POST 4Original post

The biggest difference would be the updated intermediate shaft with the larger single row bearing. I've seen this update/upgrade even on replacement engines for 2.5 Boxsters. Otherwise, no notable changes.

POST 5 / ORIGINAL POSTEROriginal post

Quotes source post: 4960380

Thanks. I had been reading about aftermarket crankshaft bearing improvements, and was wondering if they ever made that correction on the 3.4. Now, when you say "intermediate shaft" you are referring to a bearing midway on the crankshaft, right (i.e., not one of the end bearings)?

POST 6Original post

Quotes source post: 4960529

The intermediate shaft runs the length of the block. It spins the cams and it's chain-driven by the crankshaft.

POST 7 / ORIGINAL POSTEROriginal post

Quotes source post: 4961857

Thanks for the info. I think it's time I updated my knowledge about the P water-cooled engine and looked at an exploded diagram of the internals. Seems like an extra shaft in the process would increase the friction, and therefore rob energy -- but I'm sure a couple of engineers at Porsche musta thought of that beforehand.

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