rod bearing clearance with plastiguage
#1
rod bearing clearance with plastiguage
stock LS1 crank (just back from polishing). I used plastigauge to measure the rod bearing clearance. i get clearances anywhere from .0015" to .0018" (keep in mind its plastigauge, not exact). I would ideally like them to be looser around .0020". can anyone with any knowledge tell me if i will be ok with these clearance. car is a 400 rwhp N/A heads and cam street car. thank you
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Mgg4591 (01-13-2020)
#6
TECH Fanatic
I think our builds are on the same schedule, haha.
I just measured all my rod bearing clearances today, and I have one that is .0017-.0023. All the others are .0024-.0028.
Also interested to hear feedback on undersized bearings.
I just measured all my rod bearing clearances today, and I have one that is .0017-.0023. All the others are .0024-.0028.
Also interested to hear feedback on undersized bearings.
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#8
I put ARP rod bolts in my stock rods and they had to use the "1" over bearing cause they moved a little. I only come up with .0011 with plasti gauge. Never ran one that tight. Guess I'll have to borrow a dial bore gauge to check a little closer.
If I still come up with the same # of .0011" should I let it ride or put a halt to the build. The crank was standard and just needed a polish, no overbore, LQ9 with LS3 heads, shift RPM will be 6800-7000........100% Track car only
If I still come up with the same # of .0011" should I let it ride or put a halt to the build. The crank was standard and just needed a polish, no overbore, LQ9 with LS3 heads, shift RPM will be 6800-7000........100% Track car only
#13
TECH Fanatic
My undersized rod bearings just came in, here are the results. Measured with .001mm dial bore gauge.
Eagle H-Beam Rods, ARP 8740 Bolts
Initial setup: Clevite H Bearings (CB-663HN) Upper & Lower. Min clearance = 0.0017", Max clearance = 0.0023"
New setup: Clevite HX Bearing (CB-663HXN) Upper, Clevite H Lower. Min clearance = 0.0020", Max clearance = 0.0030"
Eagle H-Beam Rods, ARP 8740 Bolts
Initial setup: Clevite H Bearings (CB-663HN) Upper & Lower. Min clearance = 0.0017", Max clearance = 0.0023"
New setup: Clevite HX Bearing (CB-663HXN) Upper, Clevite H Lower. Min clearance = 0.0020", Max clearance = 0.0030"
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0352Marine (08-04-2019)