Thread: Never Mind.... I torched it.
09-19-2010, 04:14 PM #1
Never Mind.... I torched it.
Well, after finally getting everything dialed yesterday, I managed to overheat the engine. Apparently, some leaves, or grass or something was blocking the cooling line coming off of the front cylinder. I heard a whole bunch of rattling, and then it shut down. I started it back up, and noticed the pisser water was finally flowing, and it cooled off and ran fine.
I pulled the engine apart today after getting compression readings of 125 front, and 150 rear. If I remember correctly, I had 175/175 when I put the Pro Tec head on before last winter.
Anyway, The front piston was burned severely on the front (facing the flywheel) and also a touch at the exhaust port.
So now I guess I am in the market for a new piston, rings for both, and some gaskets....
09-19-2010, 04:29 PM #2
i would think if it got hot all pistons and cylinders would show it, check your oil line and carb on that cylinder....was there any debris on top of the head gasket when you pulled the head ? good luck
09-19-2010, 04:46 PM #3
I pulled the cooling line, and there was green, leafy crap in it. After getting it all out, it ran fine with no overheating. I run premix, so no oil lines...
And apparently it blew the head gasket because there was also the white water/gas/oil mix in the dome of the head. You can also see where water was getting by in the same place where the burns in the piston are.
Oh yeah... Anyone got a spare 85mm Wiseco laying around?
09-19-2010, 06:07 PM #4
That sure looks lean to me Scotty....not much of a wash on those intake port sides
09-19-2010, 06:10 PM #5
You are right about that. And I also just had a thought about why it would have wiped the front piston.... I am so pissed right now, I can't see straight.
I am half a step from just taking it all to the landfill.
09-19-2010, 10:04 PM #6
I just spoke with you earlier today. This is two people now(you and scott), I talk to them then they go out and blow it up an hour later. Wow! Hope you get it back together.
09-19-2010, 11:37 PM #7
Looks like you blew a head gasket and water backed up into the cylinder.
09-20-2010, 04:41 AM #8
Well, here's the scary part, guys.... Remember when all of that crap was being whipped around under the cover when that metal piece that holds the wires cames loose? And it ended up blowing a hole in the front cover, etc?
Guess what I saw laying in the bottom of the hull? A crank seal spring.... The one on the rear seal is still there.
So of course I am thinking the front seal got wiped, and that means a big vacuum leak, and you guys know the rest.
I am pretty sure I am done for this year.
09-20-2010, 04:15 PM #9
Yup...looks like I maybe correct then on lean..cause that piston sure don' thave much wash...
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