How do I know when Its time to retire the block?

Any qualified machine shop can tell you that.. Typically when you go over 93.5mm or .060, it's time to be concerned - not all blocks can be overbored beyond that.

I agree with the above - talk to engnbldr.. His shop may even do complete longblocks.

If you want more than 140 or 150 hp, look to DOA or LC.. Just understand what you're buying.


1988 4Runner
22RTE core, turbocharged, megasquirted...