2003 wr 450 blew out cam half moon plug from valve cover?
Posted May 18, 2008 - 10:16 PM
Posted May 18, 2008 - 10:23 PM
It turned out it was'nt so when I started it up and reved a bit, the half moon rubber popped of.
The hose was filled with some really sticky stuff that completely blocked the airway from valvecover
EDIT: And hey, dont forget to add some drops of glue on the halfmoon when putting new one in.
Posted May 18, 2008 - 10:30 PM
Posted May 19, 2008 - 02:47 AM
thanks alot, thats what i was kinda thinking. is there a valve in the cover or is it just baffled?
There's no valve in the cover, it's a straight shot in through the pipe.
I've blown mine out twice. Both times it was caused by the line icing up where it enters the airbox.
The vent on your bike must be plugged. It's internal pressure buildup that pops out the 1/2 moon.
Posted May 20, 2008 - 08:18 PM
Posted May 21, 2008 - 12:09 AM
well i tore it down and found no restriction in the tube or the pipe. Is there anything else i should look for? It did make a loud sound like a firecracker when it happened, I thought it was like a backfire or something. I checked the valve clearance while i was there and i am changing the oil, and replaceing the valve cover gasket but just feel like i might be missing something?
Mine did make a very loud pop when it happened to me.
It could happen that the halfmoon pops out if they are'nt correctly assembled and also if you have'nt glued it and it have been stored for a while, then the rubber dries out and shrink a bit.
As said earlier, if the hose is free, the overpressure would get out that way instead.