Engine rebuilders - what size micrometers?
11-09-2006, 10:32 AM
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Engine rebuilders - what size micrometers?
Finally rolled my 83 into the shop last night to start work in ernest. This will be my first full engine rebuild on the M44 series engines. I have been purchasing tools and equipment lately and I have a question - what size micrometer/s do I need to measure crank bearing surfaces and cylinder bores? Here at work we are getting ready to order some anyways, I can save on shipping if I just tack my order onto theirs.
11-09-2006, 11:54 AM
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Metric or inches?
It's nice to have a ball mic. for bearings (O-1") that reads to .0001"
For cylinder bores and housing bores you can't beat a good dial bore gauge. Most have several attachments so you can check rod big ends, mains and cylinder bores. ~1 1/2 - 5" will cover the range.
If you are buying mics. it may be cheaper to get the set that covers 0-3" for wristpins, and crank journal rods and mains, then buy a 3-4" for pistons individually. Also, some 4-5" mics will read the 100mm size, and then you could use that mic for bigger (104mm+) sizes as well.
It's nice to have a ball mic. for bearings (O-1") that reads to .0001"
For cylinder bores and housing bores you can't beat a good dial bore gauge. Most have several attachments so you can check rod big ends, mains and cylinder bores. ~1 1/2 - 5" will cover the range.
If you are buying mics. it may be cheaper to get the set that covers 0-3" for wristpins, and crank journal rods and mains, then buy a 3-4" for pistons individually. Also, some 4-5" mics will read the 100mm size, and then you could use that mic for bigger (104mm+) sizes as well.
