What is the oil filter thread size on 3800 II?

[Mark42]

Looking at various engine oil coolers and remote filter kits. Anyone know what thread the oil filter mount is on the 3800?

[Rob Bell]

Re: What is the oil filter thread size on 3800 II?

I would take a filter to a hardware store and start test fitting bolts in it.

[ssms5411]

Re: What is the oil filter thread size on 3800 II?

it is either 18 X 1.5 or 18 X 1.25 but I think 18 X 1.5 sounds fimilar just look for Buick 3800 oil relocation filter to 05'. I'm finally putting on my dual oil filter from T&D.

[cam98aro]

Re: What is the oil filter thread size on 3800 II?

it is either 18 X 1.5 or 18 X 1.25 but I think 18 X 1.5 sounds fimilar just look for Buick 3800 oil relocation filter to 05'. I'm finally putting on my dual oil filter from T&D.

it is m18x1.5

[ssms5411]

Re: What is the oil filter thread size on 3800 II?

Thanks I knew I was close.

[Mark42]

Re: What is the oil filter thread size on 3800 II?

Thanks guys. I appreciate it!

....... I'm finally putting on my dual oil filter from T&D.

Cool. Duals. Where did you mount it? Did you use a bypass thermostat in the line? I think this calls for pix!