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Talk about engine building here. New products, tricky questions or showcase your work - If it's engine building related it's welcome here.
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Hello,
I am building a BMW M20 stroker engine, using a used block, crankshaft, rods, and pistons. I plan to replace all of the usual wear items (bearings, rings, etc.) but I had a question about best practices for engine mockup assembly.
I am planning to temporarily install two different crankshafts (m20b27 and M52b28) to check measurements with a particular rod and piston combination. More specifically, I'm going to measure the stack height of both versions of the rotating assembly, relative to the deck height. The intent is to verify the information I've found on forums, decide which route to go down, and then have the block decked to the appropriate height for that rotating assembly.
The block is currently disassembled, but not yet cleaned, and still has the original used main bearings and rod bearings. Would it be best to do my mock assembly now with these original used bearings before having everything cleaned and prepped, or should I remove all of the bearings, and take the block and rotating assy. to a machine shop for cleaning first, and then do the mock assembly with brand new bearings? Or should I have it cleaned but still use the old bearings for mock assembly?
This might be a silly question. I just don't want to do something dumb and end up wasting money or damaging a new bearing with all the test fitting.
