1999 Chevy Lumina Freeze plug?

1999 CHEVROLET LUMINA

106,000 MILES • 6 CYL • FWD • AUTOMATIC

NIGROCHAL

MEMBER
3 POSTS

I originally took off upper air intake and lower intake assuming it was an air intake leak, as they are common. But it appears there is a plug that is leaking, it is steel. I cannot find any documentation in any of my repair manuals to find out what this is?

I have uploaded in a picture and circled the problem. The s shape is top of block where lower air intake meets it.

Can anyone help.[img:2019f8c888]http://www.2carpros.com/forum/automotive_pictures/286538_dsfgsdfs_1.jpg[/img:2019f8c888]

Dec 14, 2008 at 6:42 PM

BMRFIXIT

✓ASE Certified Mechanic
19,053 POSTS

Its oil pump drive shaft
it leak oil only
usually has an o ring and some have O ring and a gasket

Dec 14, 2008 at 6:54 PM

NIGROCHAL

MEMBER
3 POSTS

It is/was leaking coolant?

Dec 14, 2008 at 6:56 PM

BMRFIXIT

✓ASE Certified Mechanic
19,053 POSTS

no coolant in or around it
coolant came from the intake gasket
very common for the intake gasket to separate from the plastic around the water jacket causing coolant leak
they have an updated gasket for the subject

Dec 14, 2008 at 7:49 PM

NIGROCHAL

MEMBER
3 POSTS

The oil pump is on the complete opposite side of the engine, and what ever this is, it is in fact leaking coolant.

Dec 14, 2008 at 7:54 PM

BMRFIXIT

✓ASE Certified Mechanic
19,053 POSTS

then need a better picture
is it at the rear of engine by the tranny ?

Dec 14, 2008 at 8:45 PM

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