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DISCUSSION => Engine + Driveline => Topic started by: bar73k on March 22, 2014, 09:51:05 PM

Title: o-ring M42 block with standard gasket
Post by: bar73k on March 22, 2014, 09:51:05 PM

Hi guys,

who has done this?

I am going to do this with my new motor but i don't know what diameter wire to use and also (more importantly) the amount of protrusion above the deck to allow for?

can anyone help with some info?

Title: Re: o-ring M42 block with standard gasket
Post by: wazzu70 on March 24, 2014, 12:29:12 PM

The 6cyl guys do it pretty often. On bimmerforums.com in the FI section you can find lots of info on O-ringing. Most seem to use copper wire in a figure 8 and OEM gasket.

Can't remember wire diameter or protrusion.


Your car is one of the first turbo M42s I saw and it inspired me to go the M42 route :)

Title: Re: o-ring M42 block with standard gasket
Post by: bar73k on May 06, 2014, 05:54:29 PM

thanks mate!

my engine machinist has convinced me to go with another Cometic stainless head gasket for the time being

great to hear I inspired you to go down the turbo path! I myself found inspiration here for my build, but when I started years ago there were very few turbo M42's at the time

once i get the car running again (its been under construction the last for 3-4 years mainly due to lack of time) ill try and post some updated information as i have had many changes since the original build