frozen bolt on t-stat cover

[eluder1]

I have a 200 HP Merc outboard that is an 1984,and i needed to change the "T-Stats" when i broke the head off of the upper bolt. I removed the cover and soaked the bolt-and even heated the inside and outside of thermostat housing but the bolt only moved approx 1/8 of an inch. Do i keep doing that or does any one have a better way? please help.

 

[Perfidiajoe]

Re: frozen bolt on t-stat cover

How much of the remaining part of the bolt is sticking out passed the head? Is there enough to get a (God Forgive me) vise grip on. That it moved at all is a big plus. Keep soaking if you can grab it work it back & forth a LITTLE at a time, & a LITTLE more each time. If that don't work post again there are other things you can do. Good Luck Joe

 

[Barnacle_Bill]

Re: frozen bolt on t-stat cover

Yep, what Joe said. It will come out if you keep working it back and forth.

 

[Bob H.]

Re: frozen bolt on t-stat cover

Heat will work but the trick is to heat the aluminum just right so it expands before the bolt. It doesn't take much heat.

 

[Nos4r2]

Re: frozen bolt on t-stat cover

Have a look at this thread, it'll probably help.<br /><br /> http://www.iboats.com/cgi-bin/ubb/ultimatebb.cgi?ubb=get_topic;f=37;t=001346#000013