Intake Manifold Thermostat - How do I check it and service it?

[Namerow]

The thread for those balance tube ports is British Standard Pipe Thread. I assume that the threads on your vacuum gauge were NPT. Did you re-thread one to match the other, or was the NPT fitting close enough to just crank it into place?

[REMNANT]

Yes. 1/4 NPT Worked perfect. Found this one online. Great price.

Edited June 23, 2017 by REMNANT
Update

[Namerow]

Hope it survives the heat from the exhaust headers!

The orange paint on your air cleaner housing looks almost iridescent in the photo.  Did you use a special paint, or is it just a trick of the lighting?

[REMNANT]

VHT high heat Flat Orange w/ VHT satin clear. And the vacuum gauge has no issues with header heat.