I'm wondering if anyone knows the name or part number of that o ring on the back of the passenger head? Mine is leaking oil and I'd like to replace it at the same time I do cam seals. Also, is it the same I ring as the one behind the oil pump?

Part numbers galore on opposedforces.com

 

The oil pump o-ring is different, much smaller than the cam plug.

 

Rear cam plug on passenger side and front cam support o-ring on the drivers side are the same.

No, it is not the same as the oil pump O-ring.  But the camshaft O-ring at the rear of the passenger side head is identical to the one at the front of the driver's side head (in the block immediately behind the cam pulley.)

 

 

(You owe me a Coke, Fairtax.  Almost!)

Edited March 9, 201610 yr by Olnick