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Your IMS Bearing and Bore Scoring Questions Answered by Hartech

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YOUR RESEARCHYour IMS Bearing and Bore Scoring Questions Answered by Hartech

Leading reported evidence

Install with the big bearing

Performed · outcome unconfirmed

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Reported fixes: 0
Unsuccessful attempts: 1
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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: 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
Be prepared for an in-depth technical discussion with some surprising outcomes, one of which is that Hartech consider IMS bearing failure a minor issue especially for post 2005 vehicles (which includes all Caymans I believe) fitted with the big bearing.
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Your IMS Bearing and Bore Scoring Questions Answered by Hartech

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Leading evidence: 'Install with the big bearing' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Install with the big bearing' (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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Repair engines

Performed · outcome unconfirmed

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

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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.

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Performed · outcome unconfirmed · Original poster
Hartech’s approach to bore scoring and D-chunking is to use a thoroughly engineered Nikasil liner approach and the company’s principal Barry Hart was very sceptical of other repairers who insert a steel liner, Hartech seeing quite a few of these repaired engines which have only lasted a few thousand miles.
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Your IMS Bearing and Bore Scoring Questions Answered by Hartech

Recommend considering an engine rebuild

Suggestion or failed attempt

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Unsuccessful attempts: 1
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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 · Original poster
They recommended considering an engine rebuild from 100,000 miles.
Original post Read captured discussion
Your IMS Bearing and Bore Scoring Questions Answered by Hartech

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.

Install with the big bearing

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
Be prepared for an in-depth technical discussion with some surprising outcomes, one of which is that Hartech consider IMS bearing failure a minor issue especially for post 2005 vehicles (which includes all Caymans I believe) fitted with the big bearing.
Original post Read captured discussion
Your IMS Bearing and Bore Scoring Questions Answered by Hartech

Recommend considering an engine rebuild

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
They recommended considering an engine rebuild from 100,000 miles.
Original post Read captured discussion
Your IMS Bearing and Bore Scoring Questions Answered by Hartech

Repair engines

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
Hartech’s approach to bore scoring and D-chunking is to use a thoroughly engineered Nikasil liner approach and the company’s principal Barry Hart was very sceptical of other repairers who insert a steel liner, Hartech seeing quite a few of these repaired engines which have only lasted a few thousand miles.
Original post Read captured discussion
Your IMS Bearing and Bore Scoring Questions Answered by Hartech

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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.

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

Porsche Club GB: 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: 20261026T024951Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Thanks to Jeff for posting the following. For those who missed it, follow this link to view the video of Tuesday evening’s presentation by the Hartech team which discussed in detail IMS bearing and bore scoring issues - and more - on the 996 and Gen1 987/997. https://www.porscheclubgb.com/regions-registers/registers/modern/997/news/2022/january/997-hartech-evening Be prepared for an in-depth technical discussion with some surprising outcomes, one of which is that Hartech consider IMS bearing failure a minor issue especially for post 2005 vehicles (which includes all Caymans I believe) fitted with the big bearing. I was very surprised how much bigger this bearing is compared with the original single row and later double row bearings. Hartech’s approach to bore scoring and D-chunking is to use a thoroughly engineered Nikasil liner approach and the company’s principal Barry Hart was very sceptical of other repairers who insert a steel liner, Hartech seeing quite a few of these repaired engines which have only lasted a few thousand miles. For those interested in more power, Hartech offer capacity increases of ~300cc while the engine’s in for repair. Apparently their 4.1L 997 is a bit of a weapon, so a 3.7L Cayman should be a worthwhile upgrade for £2k on their standard bore repair. Apart from the above issues, on high mileage engines Hartech are more concerned about main bearing failures which can cause catastrophic and irreparable damage to the engine. They recommended considering an engine rebuild from 100,000 miles. Jeff 987.2 Cayman S North Beds (R10 & R24)

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