Excellence say just remove the IMS outer seal!

[Bfan]

Originally Posted by tcallas

Great question, I would have to say yes. Actually, I will back pedal some on this one, I was thinking about warm running conditions/noise on the M96-M97 engine, but the start-up noise does seem slightly better with the 5w-40 weight lubricants. The greatest growing concern of mine right now is the M96-M97 IMS chain tensioner. If it were mine, I would replace that tensioner every 40k miles. Jake has seen catastrophic engine damage occur when the IMS chain tensioner has worn-out and left loose for too long. Listen for ratting noises on cold engine start-up, this can be indicative of a worn out IMS chain tensioner. It’s now on my list of preventive maintenance items, not to be taken lightly.

Good luck,
Tony Callas
Callas Rennsport

Hi Tony.
Thanks for all the input. What about LN´s IMS chain tensioner upgrade. Does it also need 40 K miles replacement interval?
Gunnlaugur, Reykjavik

[BYprodriver]

Originally Posted by Bfan

Hi Tony.
Thanks for all the input. What about LN´s IMS chain tensioner upgrade. Does it also need 40 K miles replacement interval?
Gunnlaugur, Reykjavik

Bfan I think you are referring to the crank to IMS chain tensioner with replaceable wear pad. I call this a "paddle" to differentiate it from the hydraulically operated tensioners. The LN paddle is billet aluminum & should last for the life of the car with the possible exception of the Porsche replaceable wear pad between the paddle & chain.

[Bfan]

Thanks for clearing this up Pro