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Another spun rod bearing [message #371311]

Sat, 06 May 2023 18:52

bwevers

Messages: 597
Registered: October 2010
Location: San Jose

Karma:

Senior Member

I'm at a loss to figure out why this happened again. My 455 spun the #7 rod bearing while cruising on Interstate 5 near Los Banos. This engine had more than 10,000 miles on it since the last rebuild. The crankshaft was turned .010/.010" by a reputable shop. And this engine had previously spun the same rod bearing 7 years ago. It has a high-volume oil pump. I had changed the oil within the last 3000 miles. The oil pressure was good, 40 PSI hot. Usually I get 60 PSI cold oil pressure, using 15W/40 Delo. I'm thinking maybe the rod bearing clearance was too tight.

Bill Wevers GMC49ers, GMC Western States 1975 Glenbrook - Manny Powerdrive, OneTon 455 F Block, G heads San Jose

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[Message index]

		Another spun rod bearing By: bwevers on Sat, 06 May 2023 18:52
		Re: Another spun rod bearing By: RF_Burns on Sun, 07 May 2023 05:04
		Re: Another spun rod bearing By: bwevers on Sun, 07 May 2023 11:35
		Re: Another spun rod bearing By: roy1 on Sun, 07 May 2023 12:20
		Re: Another spun rod bearing By: roy1 on Sun, 07 May 2023 12:25
		Re: Another spun rod bearing By: JohnL455 on Sun, 07 May 2023 13:14
		Re: Another spun rod bearing By: Carl S. on Sun, 07 May 2023 19:06
		Re: Another spun rod bearing By: bwevers on Sun, 07 May 2023 21:18
		Re: Another spun rod bearing By: Carl S. on Mon, 08 May 2023 12:05
		Re: Another spun rod bearing By: JohnL455 on Mon, 08 May 2023 08:59

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