I need advice from the list on my GMC 228 engine I am re-assembling.
The
first problem I am having is that my #6 cylinder bore has a groove in it. I
created the groove while learning how to use my ridge reaming tool. I
started the reamer too deep in the hole, and made a groove that is deep
enough to feel with my fingernail about two inches from the top of the bore.
I re-installed the piston in the bore, and tried to move the crank in a full
revolution. When the top ring reached this groove, there was a noticeable
drag. The piston did not slide over this groove freely. I could have
forced the crank through this section of the stroke, but I just took the
piston back out of the bore and went on to the other five. PROBLEM #1: How
do I remove the groove from the cylinder bore? Is it possible without
having the block re-bored?
Moving on to cylinder #5 and #4, the re-assembly was relatively
trouble-free. Cylinder #3 was going well until I tried to re-tighten one of
the connecting rod bolts. The bottom thread has a bad section, and I cannot
tighten it. PROBLEM #2: How do i fix the rod bolt? Can I chase the bolt
with a die and run a tap through the nut? If the bolt is not repairable, is
the GMC rod bolt available from auto parts stores? Is it the same design
and size as newer engine rod bolts that can be purchased new? Lastly, does
anyone have a spare rod bolt from another GMC motor they can part with if
the components are not available new?
Third problem. If I have, in fact destroyed the bore on the #6 cylinder
bore, does anyone have a spare block in the Cleveland, OH area that they are
willing to part with? I would prefer to re-use my pistons, as they are in
good condition and 0.060" overbore. To have my block honed at a machine
shop would mean buying a new set of pistons as well. If I get a standard
size block, I could take it to 0.060" overbore without buying another set of
rings and pistons. I am no longer a single man restoring a truck. I have a
wife and son, so I need to keep this rebuild as economical as possible.
Please, someone on the list, tell me what I can do to fix this engine!
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