Originally Posted by
ambryatim
Right. It has B18C stamped on the block and PR3-3 on the head but on the oil pan it has P72. How do I tell if it is a true Type-R with the high compression pistons, with out removing the had to look for a casting number of P73 on the piston????
Do a compression test...
The ITR should have higher compression numbers, as it has higher compression pistons...
Did you look at your IM?
If it has the IAB system then it's a GSR motor not an ITR...