Thermostat Cover Removal - Need Help

[Rsolo]

Motor: 1991 Evinrude 150hp, Model# TE150GLEIS

I've stripped the socket head portion of the plastics thermostat cover. I can get small grip of the socket head with a cresent wrench but can't apply much force and can't get the cover to budge. I srayed with WD40 hoping to break loose. Any suggestions? Drill out?

 

[ezeke]

Re: Thermostat Cover Removal - Need Help

Tap on the plug to break the gasket sealer, then use a box wrench that fits snugly.

 

[Texasmark]

Re: Thermostat Cover Removal - Need Help

Sorry for the mfgrs of WD 40, but it is not your best answer to metallic rust busting.

Mark

 

[Wishiniwuzfishin]

Re: Thermostat Cover Removal - Need Help

Texasmark: Any recomendations on a rust penetrant/loosener? I have tried several with no clear winner.

 

[oldgradywhite]

Re: Thermostat Cover Removal - Need Help

PB Blaster is the only thing in a long line of rust busters that worked for me.

 

[mikesea]

Re: Thermostat Cover Removal - Need Help

use a six point socket or six point box wrench

 

[ezeke]

Re: Thermostat Cover Removal - Need Help

PB Blaster is the only thing in a long line of rust busters that worked for me.

It's a plastic part with gasket sealer holding it in place; rust buster will not help. Use the correct six point tool as mikesea said.

 

[ClassyGlassy]

Re: Thermostat Cover Removal - Need Help

PB Blaster is what we used in the Navy Submarine fleet!! When that doesn't work.....get a BIG hammer....j/k

 

[Just Pluggin Along]

Re: Thermostat Cover Removal - Need Help

Had the same problem last spring and ended up having to drill and chip it out. It did work but I was worried about ruining the threads. Was able to get new cover from local dealer. On the others, I used the six point socket and that worked better than the smaller nut portion that sticks out.

 

[Rsolo]

Re: Thermostat Cover Removal - Need Help

UPDATE: Thanks everyone for the advice. I was not able to get a good grip with the box wrench, in fact I damaged the cap more so decided to chisel off. I them wedged a wide blade screw driver in the inside diameter and srewed off. What a pain!

 

[Texasmark]

Re: Thermostat Cover Removal - Need Help

Texasmark: Any recomendations on a rust penetrant/loosener? I have tried several with no clear winner.

PB Blaster from Autozone or Kroil industrial strength available from them www in liquid or spray.

Mark

 

[Tim Frank]

Re: Thermostat Cover Removal - Need Help

For metal-metal , 50/50 mix of acetone and ATF. Do not get on your hands or plastic or rubber parts.