can the top end ( piston and rings ) be replaced with out removing the engine ?????
Same bikes. It was Grizzly in the USA, named Kodiak in Canada.well that is good news...thanks. Im assuming the rings are gone...with the engine running the pressure in the crankcase seems very high. with the dip stick removed pressure coming out the dip stick hole is high.... leak down and compression test tomorrow to verify... and tips on the top end removal are appreciated....BTW engine smokes like a chimney when accelerating and de-cell.::surprise:
Also.. when i look up the Yamaha parts list only the griz is listed...no kodiak.. i'm assuming the 2 are VERY similar and use the same engine parts for the 450 EPS ?
OK fair enough... but what about the high CC pressure....and what is considered normal CC pressure ?Plugged crankcase vents will blow out crankcase seals. It shouldn't cause oil burning.
You could still have a bad oil control ring. This will give you good compression but still burn oil. You could also have a cracked ring. I have seen engines with cracked rings still make full compression, but it would fail leak down test.
Or you could have leaky valve seals causing your oil burning.
Why do you think you have crankcase pressure?OK fair enough... but what about the high CC pressure....and what is considered normal CC pressure ?
Well done! Hopefully a fresh piston and rings is all that's needed. The leak down tester is the best way to positively detect that stuff.Well the leak down test shows leakage past the rings which would be the cause of the high CC pressure....tear down to start today
.Valve clearance (cold)
0.09-0.13 mm (0.0035-0.0051 in)
0.16-0.20 mm (0.0063-0.0079 in)
That's the valve adjustment limits right from the service manual. I prefer to set them in the middle to loose side.
There is...BTW is there an empty power plug somewhere in the front to hook up hand warmers ????