Ive got a GSR block and a B16 head. Originally i was running a whole GSR engine but i got a PR3 head and sent it to the machine shop to get looked over and install a full brian valvetrain. The valvetrain is OEM size valves, double springs, steel retainers, and stage 2 NA cams. When I put the B16 head on the car I pulled bad compression. None on 1, little on 2, about half on 3 and almost full on 4. Assuming the machine work was done correctly I figured I had bad rings or a gouged cylinder but i never tested compression before. So i pulled the engine and looked over the block and there were some rough spots on the cylinder walls. I sent the block to a different machine shop to get it bored over to fit a 81.5mm piston and clear the bottom of the cylinder walls for the connecting rods. Then came the time to save up the 2500 for the 2.16L bottom end. 4 months later I assemble everything, new OEM headgasket and ARP studs. Torque everything to the specs in the haynes manual, go to test the compression and Im back to square one... Exactly the same as it was before the new rings and complete bottom end. Checked the timing 15 times, the top marks are right, the inside marks line up, the crank mark is on point... So Im kicking myself in the ass because it seems like the first machinist didnt do something right on the head. What can I do? What can I test? Im not very experienced with internal work, but the person that is working with me is and he is stumped as well. Tomorrow I'm going to check the valve lash with a few tutorials that i found on the internet. Is there anything else i can do before i go to the machinist and have him double check his work?
Any help will be greatly appreciated. Leaving for a deployment to Afghanistan and I need this car on the road before I go. Im sure a few of you can understand my dilemma.
-Tom
Any help will be greatly appreciated. Leaving for a deployment to Afghanistan and I need this car on the road before I go. Im sure a few of you can understand my dilemma.
-Tom