on rock auto there is a 35 mm thermostat housing and a 40mm, which one is correct?

[stamina]

the engine i have is a 1995 4.0 ohv, ad theres tw options? which one is the right one? or is bigger just better?

 

[franklin2]

Autozone sells both also. You will just have to measure yours I guess. 35mm is about 1 3/16 inches. 40mm is about 1 37/64 inches

 

[Snoranger]

Autozone sells both also. You will just have to measure yours I guess. 35mm is about 1 3/16 inches. 40mm is about 1 37/64 inches

Yeah... what he said.
FYI, they’re taking about the hose end, not the thermostat end.

 

[franklin2]

Yeah... what he said.
FYI, they’re taking about the hose end, not the thermostat end.

That's good to know.