outacontrol
04-15-2013, 07:52 PM
I freshened up my 450r last month with a new JE piston, timing chain, and swapped out my web cam with crf cam. Also changed all gaskets and valve seals. Shimmed valves and it fires up in 2 kicks and runs excellent. Here is the problem:
When it warms up it starts steaming out the crankcase breather in the airbox. I thought i had gotton antifreeze in the bottom end, so i have changed both the engine oil twice and tranny oil. All fluids are keeping level and not overfilled. I get no smoke/steam out of exhaust at all. I verified its coming from the crank side of the hose and not valve cover. The steam has a sweet smell which makes me think its antifreeze. This quad was running perfect before the tear down, and the cylinder looked great, and I checked ring gap etc. Any ideas what to check? I even rode it around for 10 mins to see if the steam would stop and it doesnt. I asked a local mechanic and he is stumped too
When it warms up it starts steaming out the crankcase breather in the airbox. I thought i had gotton antifreeze in the bottom end, so i have changed both the engine oil twice and tranny oil. All fluids are keeping level and not overfilled. I get no smoke/steam out of exhaust at all. I verified its coming from the crank side of the hose and not valve cover. The steam has a sweet smell which makes me think its antifreeze. This quad was running perfect before the tear down, and the cylinder looked great, and I checked ring gap etc. Any ideas what to check? I even rode it around for 10 mins to see if the steam would stop and it doesnt. I asked a local mechanic and he is stumped too