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Engine Block drain Plug??????

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Old Aug 6, 2006 | 09:58 PM
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Default Engine Block drain Plug??????

Can someone tell me where the engine drain plug is on my 81 small block? Thanks. I've looked everywhere but behind the starter.
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Old Aug 6, 2006 | 10:09 PM
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Just went out and looked at my 81. It's about as far back as where where the oil pan goes from shallow to deep, on the block just above the oil pan. Your exhaust may be hiding it. God bless, Sensei
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Old Aug 6, 2006 | 10:15 PM
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Glad you are interestd in it, an often overlooked item.

They can be very hard to loosen at times. Replace with a brass hex head if necesaary and use them to flush. One on each side of block.
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Old Aug 6, 2006 | 11:57 PM
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Originally Posted by noonie
Glad you are interestd in it, an often overlooked item.

They can be very hard to loosen at times. Replace with a brass hex head if necesaary and use them to flush. One on each side of block.
They can also be replaced with brass radiator petcocks
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Old Aug 7, 2006 | 12:49 AM
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Thank you all very much. I'm removing my engine and want to drain the block. This is a big help. Take care and thanks again.
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Old Aug 7, 2006 | 07:43 AM
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From: Wilmington DE, Drive it like you stole it, 68 327 4 speed coupe
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Originally Posted by Richard Cooper
Thank you all very much. I'm removing my engine and want to drain the block. This is a big help. Take care and thanks again.

there are two drain plugs on either side of the block located in the middle of the block just behind the engine mounts, these will allow you to drain all of the coolant from the block.

they are small, 1/4 inch square headed bolts or close to that as i reacall.


cheers tim
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