Engine rebuild advice
Hello and thank you in advance for advise given.
I'm in the process of getting bits together to do an engine rebuild and have a question..... if I'm using a new crank and new acl bearings do I need to check/ worry about main bearing clearances?? I'm thinking not as all is brand new but want to check /ask advise to be sure . Most posts I've seen mention clearances on rebuilds using old cranks. Cheers Vote for pedro |
Yes you need to check them with plastigauge as sometimes the manufacturing tolerances aren't good enough and can leave a clearance too big even on a new crank with new shells. Especially when using aftermarket shells.
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I check mains and big ends on every engine I rebuild wether using new or used parts, doesn't take long and saves stripping it all down again.
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Thanks for your quick reply.
What would you do if the clearances where incorrect? Vote for pedro |
I'd personally check the clearances with a decent set of micrometers and a bore gauge as well as plastigauge.
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Cheers for the replies / help.
I purchased a second hand (only 1500 miles)rear thrust converted 2.1 cdb with Mahle power pack pistons all built up by a well known Bristol based engine building company.. the previous owner ran in the engine/ had it tuned to 500+bhp.... decided he wanted more so took his crank and rods to make a 2.3 so I became the new owner of the block and pistons... |
Will check and double check everything when I do the rebuild...
Just another quick one..... do you use standard length conrods on a 2.1 stroker engine with these power pack pistons and ej25 crank? I have a set of forged Williams motorsport conrods .... they up to the job?? (Swapped them for a cdb I had). Thanks again |
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