Removing Thermostat Housing

[weq92f]

Originally Posted by 54blackhornet

When I was younger I made a lot of stupid mistakes like trying to remove stuck fasteners by using brute strength. After a while one learns that patience beats strength every time. I knew by the look at that aluminum housing I was in for a fight. Not certain why aluminum was chosen , knowing about corrosion between steel and aluminum ? The only reason I wanted to change the thermostat is because it has been in place since early 2000’s. Drilling a hole in the head of the bolt for penetrating oil is a novel idea but has anyone ever successfully done it ? Thanks for the suggestions.

.

There's at least one reference on the Internet to the drilling the head method. First for me!

Quote from the comments section of the article below.

Mike Dunn
October 2, 2013 at 8:18 pm
I drilled a 1/32 inch hole in the top of the head bolt and squirted PB penetrate into the hole. It works it way down the shaft of the head bolt to the threads.

https://www.eastwood.com/garage/10-t...d-stuck-bolts/

-Kevin