Hello All,
I have been hitting my head against a wall trying to find the reason I have low compression in all my cylinders after a fresh rebuild. after a dry and wet compression test I concluded that it was not the rings. So I thought it was either my valves or it was a timing issue. I ended up pulling the engine after 3000 miles to check if the machinist did a hack job on the valve but after I did my water and compressed air test all the valves seem like they are seating correctly, except for one.
The engine builder I took it to put in new tappets and a new camshaft from ITM, I did some reading and saw that the 2F and 3F cams have the same profile but the 3F cam is 5 degrees advanced. Is this true? I was was running a 3F cam would that cause my problems? If not, any ideas?
Another thought, with the cam advances would I need to adjust my valve lash to different values?
I have been hitting my head against a wall trying to find the reason I have low compression in all my cylinders after a fresh rebuild. after a dry and wet compression test I concluded that it was not the rings. So I thought it was either my valves or it was a timing issue. I ended up pulling the engine after 3000 miles to check if the machinist did a hack job on the valve but after I did my water and compressed air test all the valves seem like they are seating correctly, except for one.
The engine builder I took it to put in new tappets and a new camshaft from ITM, I did some reading and saw that the 2F and 3F cams have the same profile but the 3F cam is 5 degrees advanced. Is this true? I was was running a 3F cam would that cause my problems? If not, any ideas?
Another thought, with the cam advances would I need to adjust my valve lash to different values?
Last edited: