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Old 07-28-2011, 03:10 AM   #1
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Default 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"

0.002"=0.051mm 0.0015"=0.038mm
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
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Old 07-29-2011, 02:21 AM   #2
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Comon brothers I see you viewin my post unless those were my 40 views checking back to see if anyone said anything lol which they werent.
I'll probably just run it anyways but I wanna hear your opinions!
maybe this will attract you
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Old 07-29-2011, 02:59 AM   #3
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Your clearances are fine. I'm at .0025-.0032" and I have marginally low oil pressure. You 1.4 to 2 thou is fine.
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Old 07-29-2011, 03:24 AM   #4
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Alright sweet that's exactly what I was looking for, Thanks!
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