2000 7.4l oil drain plug

[ChevroletTough]

Hey guys, just changed the oil on my 2000 K3500 7.4l. Looks like the seal is failing. I ordered a new plug from rock auto but it wasn’t even close. All listed for my engine show the same size which cannot be right. Does anyone know the correct size? No ac deco part # on lookup. I’d assume just get a new plug with gasket.

 

 

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[ChevroletTough]

M12x1.75 isn’t right.

 

Maybe I’ll just swap the gasket. Sucks i have to drain 7 qts of oil though ha.

 

 

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[diyer2]

I looked at Rock Auto and Oriellys.

Both list M12x1.75 

GM https://www.gmpartsdirect.com/oem-parts/gm-engine-oil-drain-plug-11562588

 

[diyer2]

OK

[dsr611]

25 minutes ago, ChevroletTough said:

M12x1.75 isn’t right.

 

Maybe I’ll just swap the gasket. Sucks i have to drain 7 qts of oil though ha.

 

 

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Changed my oil once and the gasket didn't seal.  I drained the oil and caught it in a clean container, replaced the gasket (actually punched one out of a piece of garlock we had at work), put the plug back in and reused the "old new" oil...only had a couple hundred miles on it when I found the gasket leaking so the oil still had plenty of life.  Plug didn't leak afterwards.

[ChevroletTough]

That’s my plan!


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[ChevroletTough]

I picked up an m14 as well, just to test.


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[ChevroletTough]

M12 too small, m14 too big. Ended up removing the crush washer on the "stock" pan bolt (pretty sure that was my issue) and replaced with the m14 synthetic washer. Have cardboard under it, but I'll be able to tell if it's leaking just by looking around it. The surface on the oil pan looked good. Hopefully this fixes it. The plug itself is in good condition so I won't replace it.

 

Also, pretty sure I need a radiator now too, oye this truck needs to stop kicking me!

[txab]

Just use one of these in the appropriate size.

 

Oil drain plug gasket

 

 

Edited July 2, 2020 by txab

[ChevroletTough]

Thanks, but I think this washer should work just fine, went out and checked and it looks good so far. I'll take it for a spin over lunch and check it again.

[ChevroletTough]

No more leaky leaky.


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[Brian Lindsey]

make sure your m-12x1.75 is just that, got two  from different stores and both too big , i wanted to remove the aftermarket  valve type drain on my 5.7 and i couldn't because new plugs were too big , got out my bolt sizer and both were 14 mm