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)
