944/951guy

Does anyone have the part numbers for the seals/O-rings that the oil lines use for the external oil cooler?

Rob Edwards

The o-rings that seal the hoses to the oil cooler itself = 900 331 022 40.


The sealing rings that seal the cooler hose fittings to the block = 900 123 118 30.

944/951guy

The ones that go to the block are for the cooler hose fitting not the actual hoses correct?
Are those worth changing if I dont touch the fittings?

Rob Edwards

Correct, the sealing washers go between the fitting and the block. My sense is that you don't mess with the block fittings unless necessary. May also be worth investing in a 30 (or 32? can't recall) crow's foot wrench so you can get proper torque on the cooler hose fitting- it's tight up in there. I bought a set of Sunex's off of Ebay a while back.

http://www.tooltopia.com/sunex-tools...googlebase_18u

944/951guy

Good Idea thx.

Rob Edwards

Good discussion here RE: 1-time use block sealing washers and not wanting the fittings to turn while loosening/tightening the cooler lines:

https://rennlist.com/forums/928-foru...mm-torque.html

944/951guy

Ooops Mine did loosen when I was taking off the lines but I tightened them back up and will leave them as is because I have seen the threads get ruined while taking them out of the block.