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Is there a plug on the 3.6 block to drain the coolant?

Alacran

Buick Newbie
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Buick Ownership
2012 Buick LaCrosse
on the 3800 series II you can pull the knock sensor and coolant from the water jacket drains out of block. The pre LS blocks have plugs too. I tried looking similar drain plugs but i cannot find anything on the internet.

If there is a book on the 3.6L engine that would be nice.

TIA
Nic
 

d2305

Member
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Buick Ownership
14 Lacrosse
I pulled off the radiator hose on the block.
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Alacran

Buick Newbie
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8
Buick Ownership
2012 Buick LaCrosse
yeah i removed the plugs on an engine in the junk yard...the plugs are sealed with thread sealant instead of o-rings. also the plugs are blocked, front by the starter and rear by a harness. It seems that the plugs that are easy to get to are oil block plugs and not coolant. I am just going to have to pull the radiator hose off a couple of time instead of once

The plugs towards the front of the engine are oil.
 

MelsRegal

Full Member
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Regal GS 2017
Why arent you opening the radiator petcock and jacking up the rear of the car to drain additional coolant?
 

Alacran

Buick Newbie
31
4
8
Buick Ownership
2012 Buick LaCrosse
also radiator petcocks tend to leak after disturbing the oring seal.
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