problem's with 4mill with breakin

[shrimp]

has anyone seen this? the coolent going out the over flow. temp getting to 190. stop and check rad. and its low. left pipe smoking alot more then the right.

[rubberneck]

At only 190, it shouldn't be puking out the overflow, so my guess would be combustion leak into the water jacket. Probably head not sealed correctly. Did you check your squish clearance before you fired it up? What kind of head are you using?

[Ducman]

I had my dome o-rings and a few others start to melt shortyly after I broke in my 4mil cub. I tried all kinds of stuff to help cure my precieved overheating problem, jetting, timming, billet impeller, toomey radiator before I figured it out. I finally determined that it wasn't even getting very hot and puking fluid and I read on this forum about melted orings causing this. In fact I think my engine is just starting to do this again. Replace the orings in the head, I'd bet they're the problem.

[shovelhead]

what causes the o-rings to melt? too much heat in initial break in or what? just like to know for future reference..

[dajogejr]

The wrong kinds. Viton orings are the way to go...it's what is supplied with any aftermarket head.

 

It's possible it got pinched upon installation, shit happens.

[Animalman294]

Ya, I've heard of them getting pinched when they get installed, but you would have to get the thing pretty damn hot to melt it..............

[dajogejr]

You pinch it in towards the cylinder it'll melt in no time.

[monster_energy06]

for sure head gasket or o-rings had that happen to me on my shee and a few of my sleds

[shrimp]

thanks all i found a problem today. left cylinder oring in peices and left pipe full of coolent. marks in left cylinder and rings look good. no clue to what did this.

[shrimp]

pict

[shrimp]

pict.

[Hilarious]

damn, that sucks.