08 boxster RMS depth

[vza]

On to the next project. Doing the rear main seal on my 08 boxster. Is the depth still 13mm for the seal or is there an updated number, thought I read 14mm somewhere. Also, any thoughts on taking the rubber seal off the front of the IMS bearing. Read conflicting reports about doing it or leaving it alone. Thanks Vince

[JFP in PA]

13MM is correct, installed using the correct tool for the updated design PTFE seal. Both the seal and the opening MUST be absolutely clean, not even finger prints or the seal will leak.  NO SEALANT of any kind should be used.

 

Removing the flywheel side seal on the oversized IMS bearing is highly recommended.  Prior to removing the IMS flange, the engine must be locked at TDC, with the cams also locked in position before removing the hydraulic chain tensioners; then the flange can be removed and the seal extracted.  A small dental pick is the ideal tool to get the seal out.

 

[vza]

OK, Which tensioners are removed(forgot) ...and just replace the IMS flange 'as is' or do i need to replace a gasket. Thanks Vince

[JFP in PA]

You need to remove the two that tension the IMS chain on the flywheel end of the engine, easiest thing to do is locate an online copy of LN Engineering’s IMS retrofit instructions and follow them to the letter.

 

The IMS flange has a ribbed seal around its circumference, not sure if Porsche offers it separate from the cover anymore.