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Compression loss! Need Help!

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

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHCompression loss! Need Help!

Reported or suspected cause

sticky hydraulic tappets

Reported cause

No successful repair reported for this finding.

1
Identified cause: 0
Suspected cause: 0
Reported fixes

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 report identifying a cause: 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.

Reported cause · Original poster
Guys, I have been encountering some small backfiring issue with my 996tt (2002 tip) and the chief mechanic of the authorised dealer said it was the sticky hydraulic tappets which caused the backfiring.
Original post Read captured discussion
Compression loss! Need Help!

Frequently discussed work

Check before

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
Was a compression checked before changing tappets?
Original post Read captured discussion
Compression loss! Need Help!

Read full discussion summary

Leading evidence: 'sticky hydraulic tappets' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'sticky hydraulic tappets' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Check before' (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.

Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.

Read captured replies

1 matching discussions · 3 captured posts examined · 0 partial discussions

Compare 3 other evidence results

Check before

Suggestion or failed attempt

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
Was a compression checked before changing tappets?
Original post Read captured discussion
Compression loss! Need Help!

Replace of the tappets)

Suggestion or failed attempt

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
My car has been with them for almost 2 weeks and yesterday I was told that my car is now encountering some engine compression loss (probably something is leaking after the change of the tappets).
Original post Read captured discussion
Compression loss! Need Help!

Replace tappets

Suggestion or failed attempt

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
Actually I would like to ask you guys (i) is it reasonable to take 2 weeks to change the tappets?
Original post Read captured discussion
Compression loss! Need Help!

Suggestion
Was a compression checked before changing tappets?
Original post Read captured discussion
Compression loss! Need Help!

Frequently discussed actions (3)

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

Check before

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
Was a compression checked before changing tappets?
Original post Read captured discussion
Compression loss! Need Help!

Replace of the tappets)

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
My car has been with them for almost 2 weeks and yesterday I was told that my car is now encountering some engine compression loss (probably something is leaking after the change of the tappets).
Original post Read captured discussion
Compression loss! Need Help!

Replace tappets

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
Actually I would like to ask you guys (i) is it reasonable to take 2 weeks to change the tappets?
Original post Read captured discussion
Compression loss! Need Help!

Suggestion
Was a compression checked before changing tappets?
Original post Read captured discussion
Compression loss! Need Help!

Reported and suspected causes (1)

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

sticky hydraulic tappets

No successful repair reported for this finding.

1
Identified cause: 0
Suspected cause: 0
Reported fixes

Read evidence and context

Discussions that report identifying a cause: 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.

Reported cause · Original poster
Guys, I have been encountering some small backfiring issue with my 996tt (2002 tip) and the chief mechanic of the authorised dealer said it was the sticky hydraulic tappets which caused the backfiring.
Original post Read captured discussion
Compression loss! Need Help!

Coverage and how to read this overview

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.

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

Rennlist: 1 discussions

0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.

0 acknowledgements have no verified action link; they do not establish a repair result.

Generation: 20261026T135432Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Guys, I have been encountering some small backfiring issue with my 996tt (2002 tip) and the chief mechanic of the authorised dealer said it was the sticky hydraulic tappets which caused the backfiring. Accordingly, I have taken my car to them to have the tappets changed. My car has been with them for almost 2 weeks and yesterday I was told that my car is now encountering some engine compression loss (probably something is leaking after the change of the tappets). I mean how could this happen? Is this poor workmanship or not? Actually I would like to ask you guys (i) is it reasonable to take 2 weeks to change the tappets? (ii) what can cause the engine compression leak in this situation? Thanks in advance.

POST 2Original post

2 wk is long but most of the time could be due to waiting for parts. If parts was already avail, engine removal and disassembly/reassembly should only take a week at most. What caused the sticking tappets? Was a compression checked before changing tappets? Dealer should be able to figure out cause of compression loss.

POST 3 / ORIGINAL POSTEROriginal post

I surely hope so. Do you think a compression loss under these circumstances is serious or minor?

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