Pelican Parts

996 leak-down test

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

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YOUR RESEARCH996 leak-down test

Leading reported evidence

Test on my 996

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Suggestion · Original poster
I'm trying to do a leak-down test on my 996.
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996 leak-down test

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Leading evidence: 'Test on my 996' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Test on my 996' (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 2 short extensions as it gets tight

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
when pulling the plugs I like to use 2 short extensions as it gets tight when you pull them out with the mufflers in place....
Original post Read captured discussion
996 leak-down test

Frequently discussed actions (2)

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Test on my 996

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
I'm trying to do a leak-down test on my 996.
Original post Read captured discussion
996 leak-down test

Use 2 short extensions as it gets tight

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
when pulling the plugs I like to use 2 short extensions as it gets tight when you pull them out with the mufflers in place....
Original post Read captured discussion
996 leak-down test

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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

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Generation: 20261026T113718Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

I'm trying to do a leak-down test on my 996. On my '71S it was easy to find TDC for each cyl by following the valve adj procedure, rotating the crank& pulley 120d. I see what may be a TDC mark on the 996 pulley but ?? I know about holding a stick in cyl, etc but that seems the hard way esp alone without a long third arm... and an eye on a stalk. Also, how does one remove the rear valence? Where are all the screws? Are there any hidden? It is prob easier with the cats & cans off, huh? tnx, jvm

POST 2Original post

TDC on the pulley is thru the pear shaped hole into the case hole at !0:00- 11:00 with a 5/16" allen wrench if you don't have the tool in the pic. This lines up the pulley mark & TDC arrow on the case @ 2:00 on the case for TDC cyl.1 & cyl. 4

POST 3 / ORIGINAL POSTEROriginal post

Hey OC, Thanks so much! I'm in to it again tomorrow. jvm

POST 4Original post

also......leave the exhaust on....just jack up the rear to a good height.. first wiggle the rubber cover up of the connector for the coils (will make plugging the coils back in easier...trust me)....then unplug coils.... find a small ratchet with a good 5mm allen and pull coils.... when pulling the plugs I like to use 2 short extensions as it gets tight when you pull them out with the mufflers in place.... follow the previous post to tdc each cylinder.....

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