Re: Crankshaft main journal tolerances on 383 rebuild
[Re: 65dodgebob]
#1044232
07/31/11 11:54 PM
07/31/11 11:54 PM
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Joined: Mar 2003
Posts: 4,929 Tri-Cities, Washington
VITC_GTX
OP
master
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OP
master
Joined: Mar 2003
Posts: 4,929
Tri-Cities, Washington
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Quote:
hey there, your measurements are already under min. spec.,but you would not want to buy .001 undersize bearings. that would add .001 clearance to what you already have! however, ideal bearing clearance in performance engines is generally considered as .001 per 1 inch of crankshaft diameter.so, ideally you could have as much as .0026-.0027 and be o.k.
Yeah, I understand I'm under spec that's why I wanted the .001" bearing to take up that difference. I guess I should have said .001" over bearing
This will not be a performance engine but a stock build.
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Re: Crankshaft main journal tolerances on 383 rebuild
[Re: dogdays]
#1044237
08/01/11 03:29 PM
08/01/11 03:29 PM
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Joined: Jan 2003
Posts: 25,200 Upper Midwest
MoparforLife
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,200
Upper Midwest
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Quote:
There used to be 0.001" UNDERSIZED bearings available as the OP said. They could still be available. There are also 0.001" oversized bearings for when you want to have a bigger clearance.
Sounds doable to me, although I'd say that extra 0.0009" won't kill you if you use standard sized bearings.
R.
You are right - my mind was in reverse. Use them to slightly tighten the clearances..
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