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Location:
Finland
Registered:
November 2002
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Breaking-in
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Thu, 15 May 2003 12:48
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Ok! I get tomorrow my engine from machine shop. Every thing is machined crankshaft grind, block bored, head shaved and so on. So, how do I run it in by the right way? As I understand piston rings suffers most about bad break in or no break in at all. One "mechanic" sayd to me to put a little fine sand in motor so it would "wear right way"  .
I have done engine rebuilds and break ins before but not to piston rings.
And no "google is good m'kay" comments. I did it already and find some ukrainian tractor plants break in instructions and same to bajaj scooters. One site suggested using mineral oil first 500-1500 miles.
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Location:
Montrose, VIC
Registered:
May 2002
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Re: Breaking-in
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Thu, 15 May 2003 13:26
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Yup, mineral oil for the first little while, it's much kinder in that it won't allow the rings to glaze over.
Make sure you don't idle it much for the first few hundred KM, and give it lots of moderate revs/load to help the rings sit home - no massive free revs. Drive it round in all gears, trying to maintain revs somewhere near peak torque, with a fair amount of throttle, but not thrashing it. Get the idea? Give it a coupla hundred KM, then drop the oil, fill it up again, and treat it a bit harder this time. Provided everything sounds/looks good, 500-1000km should have everything well and truly more than settled.
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