The heat riser clang...

dadsbee said

If it clangs your bi metalic heat spring must be gone..

Click to expand...

Now that I took another look at the TSM in the book tryimg to see what the bimetal spring is.

Thermostat spring is there, if you mean the little 'anti-rattle' spring that is missing now. Wasn't missing a couple months ago, but nowhere to be seen now.