Sitting for five years after a rebuild is not good (hopefully it was in a dry place). When one sits this long, it is best to disassemble and recheck assembly and prelube again. You say you had noisy lifters? Have you checked the oil pressure on the engine? It needs pressure to pump up the lifters and have compression (around oil rings). If the lifters are not pumped up, they may be causing the valve problems, if any.
You need to confirm oil pressure, and perform a dry and wet compression test to verify whether the compression loss is due to rings or valves. A leakdown test would be very helpful here.
And it seems that people are describing incorrect piston dome contour from suppliers.
After sitting for five years without startup, it is going to be difficult to have the machinist/rebuilder stand behind his work.
Scoring disabled. You must be logged in to score posts.
