I Need to know the bolt size of the bolts that hold the thermostat housing to the head. I broke mine when taking it off.

Thanks in advance for your help.

Manny

M8 1.25 x 35mm

m8 1.25 x 70mm

Let me know how the extraction goes. I have a couple spare E31's with the same problem.

John

Hi,

m8 x 1.25 is the size. Im not sure of the length.

Generally, welding a bolt out is the quickest way to remove a broken bolt or stud, especially if broken off below the surface.

Full Disclosure: I retired from this company 4 years ago.