Corroded thermostat area on merc

[BRIELLY]

Well now I have bigger problems. I went to snug down the bolts and sure enough one is stripped. Now what? Can this thing be heli coiled?

[macojoe]

get a tap a size bigger and re tap it. Put some anti seize on the bolt next time to keep the corrosion down. High Temp gasket maker should be fine for the pitted surface. Just don't glob it on there so it squeeze out and clog a T stat

[steplift20]

try to retap the hole and use a bigger bolt and gasket compund should work fine, thats what i use

[macojoe]

If its just the T stat housing BS said has has a bunch of them??

[BRIELLY]

The t-stat housing is fine. Its the part on the head that it bolts to thats corroded. I used an epoxy thread repair kit to fix the bolt hole and some high temp red rtv and it ran without any problems today. Gotta love havin a slip.