07-28-2011, 02:10 AM
Join Date: Jan 2011
Total Cats: 5
Main bearing clearance opinons
Alright, so I'm in the middle of a rebuild on my 96. Regular old 1.8... Anyways I was plastigauging my oil clearances on the main bearings and this is what I got
main1 main2 main3 main4 main5
0.0014" 0.002" 0.0015" 0.002" 0.0014"
now I know that plastigauge is not 100% accurate but it should be pretty close. And as per instrustions I measured at the widest point although the smashed plastic was pretty uniform.
(I measured once then again cleaning main bearing seats/threads both times and torqued to 42 ft.lbs as per haynes)
My question is, in my haynes manual and everywhere else I have seen, it quotes "Standard-- .0007"-.0014" Service limit-.004" I'm definitely under the service limit but why is the service limit so far from the "standard"?
This is with new clevite 77 standard size bearings.
Will I be okay running this?(mostly worried about oil pressure) and is this out of the ordinary? What clearance is everyone else seeing?
Thanks anyone who helps! --Joe