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Old 05-05-2012, 01:33 PM
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Rear Main Expansion Plug?

This is my first engine that I am rebuilding on my 1979 Chevrolet Monte Carlo - The Engine is the original 305ci that GM put in the car.

Last year I posted some requests for info on checking clearances, etc. I got the information that I needed and ended up taking my block to the Machine Shop to get some work done (Freeze Plugs, Vatted, bored .030 over, new cam bearings, etc.)

I had to postpone assembly until now because of school and trying to graduate - so here I am stuck once again.

I read an article talking about a expansion plug under the Rear Main Cap? here is the link:

I took the block out of the engine bag the Machinist gave it back to me in and peeked, but I didn't see one where the rear main would go. Am I missing something? Do all blocks have this?

The machinist replaced all of freeze plugs, oil galley plugs on the rear of the engine, expansion plugs under timing cover that I have seen for sure. But for the life of me I can't see where there was an expansion plug in the rear main area. I don't recall the engine having one when I disassembled but I could be mistaken.



A Rookie Rebuilder

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Old 05-05-2012, 01:56 PM
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Disregard... Found my info! Thanks anyway!
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