Thread: 800r engine problems
11-10-2009, 01:53 PM #1
800r engine problems
I am hoping to get a diagnosis from someone with more experience.
I brought a xl800 with engine problems.
the compression was good on the front cylinder, but the rear read 60psi.
and i could hear the piston hitting the head when i crank it over.
my fear was a burn piston, damaged head, and cylinder.
when i took off the head, here is what i found:
the rear cylinder head area is noticeably darker, but the good news is that all seem to be fine with the piston and the cylinder, except you can see the impact marks of the piston hitting the head.. there are fine shavings of metal on the head at the impact areas.
another thing i noticed was that when i first pushed down on the bad cylinder's piston, the piston give about 1/4 inch before it engaged the crank.
anyone know what went wrong?
thanks in advance
11-10-2009, 01:58 PM #2
How many hours on the engine? what was the compression of the other cylinders? Do you have pictures of the damage? Then we can assess your situation. You are going to need to do a rebuild that for sure.
11-10-2009, 04:21 PM #3
i don't have pics yet, i forgot to do that.
i was wondering if it's something simple enough that i can take a shot at myself.
11-10-2009, 05:52 PM #4
Your crank went out take out the cylinder and you will see the damage.
11-10-2009, 06:41 PM #5
I have a new OEM crank T/W for sale for the 800... I live on the Island as well
11-11-2009, 09:58 AM #6
well... that definitely throws a wrench into my plans.
11-11-2009, 10:11 AM #7
- Join Date
- Jul 2007
- Pontoon Beach Illinois
literally and financially
11-11-2009, 10:28 AM #8
- Join Date
- Oct 2005
11-11-2009, 09:50 PM #9
Sounds like you Lost a lower rod bearing that took out the piston and cylinder.
11-12-2009, 09:30 AM #10
stop pulling my crank
put seriously.. i think it's time to part it out, and focus on my gpr build.
pulling the engine and the computer this weekend, anyone want parts off of the rest of a 2001 xl800.. (except for the 3 degree pump nozzle) let me know!
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