327 GM bearing Question - Team Camaro Tech
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post #1 of 3 (permalink) Old Apr 8th, 10, 02:20 PM Thread Starter
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Barry
 
Join Date: Apr 2006
Location: Baltimore Maryland
Posts: 55
327 GM bearing Question

Hi guy's
Need help with a question on bearings (rod). I have what appears to be a 69 327 lg crank motor... The rod bearings in it are marked BGM AT20 2 69. Is there a way to read these bearings. I checked the rod journal with a caliper and it comes out to 2100.. Will be rebuilding it soon and just was inquisative about the markings Thanks
69Y050192
Vo613F2
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post #2 of 3 (permalink) Old Apr 8th, 10, 05:59 PM
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Bill
 
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Location: Waldorf Md. USA
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Re: 327 gm bearing Question

bug,
Those markings indicate the material and the manufacturing date. The only time GM put sizes on thier bearings was occasionally when they were a "select fit" bearing, like .001" etc If the rod journal is 2.100 that is standard but .... you really need to have it measured with a micrometer, not a caliper.

Bill Koustenis
Owner
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Waldorf Md
1971 Chevelle "Heavy Chevy" original owner


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post #3 of 3 (permalink) Old Apr 8th, 10, 08:41 PM Thread Starter
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Barry
 
Join Date: Apr 2006
Location: Baltimore Maryland
Posts: 55
Re: 327 gm bearing Question

Thanks Bill. I will use a mic on the rebuild. Now I Know something new..
Take care and say NO SNOW IN MARYLAND..Enough is Enough Ha!
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