Posted by Patcar6972 on December 12, 2023 at 07:23:47 from (184.100.213.236):
I have a 1989 bsd444 that I did a top end rebuild on. The new pistons installed are almost 1/8" below deck height. So I called the place where I bought the parts and was told they would be fine and put it together. Obviously I was skeptical because of compression loss but did as advised. Right away it was hard starting and wet stacking and had to advance the pump timing to stop the backfiring. It s in a skytrac so it s difficult to run hard if it s a break in issue but I ve been driving it to closer job sights when I can and it runs great until it idles a bit. Cylinders weren t perfect but cleaned up decent with honing maybe slightly out of round. It started easier and ran better with cracked rings in 3 out of 4 cylinders before the rebuild. Would a turbo make up the compression loss due to the piston height? Also, i have two cylinders(always changing randomly) that when I crack open the lines the fuel is foamy(air) that doesn t clear up. Could it be my entire issue is internal pump leakage?
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