Engine overheated..

[sno_mo_racer]

My father in-law borrowed my fuse 9 and he hasn't really used a liquid before. Was riding slow over a good stretch of glare ice and he said he seen the temp go to 240f. He didn't arrive after he said he would so I went to go look for him and found him. Had no more coolant so towed it back. When we got back did a compression test and they are 135/140 psi. So topped off with anti freeze and ran it for a bit. Now constantly loosing some antifreeze. Not a quick loss, just a slow leak. Not leaking anywhere so got to be into the cylinder and o-rings on the head are melted.

Now my question is, would the gaskets still be good? I ordered a complete gasket kit a couple weeks ago and was wondering should I just change the o-rings? He said to try get back he would go a bit after lost anti freeze and then cool it off then go again but not letting the temps get past 140-150. Only have about 400-500 miles on rebuilt engine so maybe the gaskets would still be good?

 

[river]

gasket are no good now, got way to hot when you take it apart you will see the o rings have melted spots on them like you said that where you are losing your coolant now.I would not use them again that for sure.base gasket should be good .

 

[94fordguy]

WOW, That's hot

Ya, get yourself a new set of o-rings for the head and you should be good to go...... O ya, make sure your father in law never rides the sled ever again, lol

 

[sno_mo_racer]

Thanks guys...

Never seen an engine get that hot and won't have time to take a look at it til the weekend, figured I would ask beforehand so I can know what to expect.



"Ya, get yourself a new set of o-rings for the head and you should be good to go...... O ya, make sure your father in law never rides the sled ever again, lol"

LOL, yeah, its a good thing they only come for a visit once in a while. Now I know to go with him next time and let him use my fathers 550..

Just got the gasket set on his coins. He asked what parts I needed after it happened. I should've been said "oh no, engine is all fried so we are goin to have to send it to HTG to get it rebuilt" HEHE I would have loved that, an early christmas gift from them...

 

[sno_mo_racer]

Got o-rings installed..

and changed the gaskets also. O-rings weren't really melted but enough for coolant to leak through (as in saying that inner o-rings were a bit thinner than outer so coolant was getting into the cylinder. Not sure why the inner melted a bit more?)
Also exhaust/ y-pipe gaskets were sticky to get off. Had to scrape off. Changed base gaskets also.
Thermostat was collapsed stuck open. Wish I took a pic before throwing it.
Piston, rings and cylinder are all good yet, no scratches or nicks.

Now have engine back in and just waiting for a new thermostat.