Join Date: Jul 2010
Location: nicholasville, ky
Cam shaft plug keeps popping out!!
I have a '87 Shadow VT700c that has developed a reputation. My wife calls it "the mystress", while I call it "the curse" because I have spent so much time working on it. The latest issue is the left front camshaft plug keeps popping out under pressure after about 12-15 miles of riding leaving me stranded while the bike vomits oil out the opening. This is the second time this has happened on the same plug. The first time I just assumed I had not properly seated and sealed the plug after an engine rebuild. It popped out and bathed me, the bike, and the car behind me with oil. I removed the front cylinder and replaced both the cylinder gasket and head gasket and cam plug. This time I paid very close attention to how well it was seated and used Permatex High Tack to seal it in. I am confident it was properly seated and yet it popped out again a couple nights ago on a test ride. Thankfully it was as I was pulling into a gas station so I had somewhere to park it off the road this time. My only thoughts are that there may be blowby around the piston rings generating pressure inside the crankcase that somehow is not escaping out of the breather tube. This pressure must get out somehow and searches for the weakest point that seems to be the same camshaft plug everytime. This doesn't seems very likely. My plan is to use a rubber mallet to temporarily pop the plug back in the hole, top off the oil, run the bike at idle for about 15 minutes and stick my thumb over the crankcase breather tub. If I don't feel any air movement, I will gently open the oil fill plug and listen or pressure releasing. Anyone else have any other suggestions? I am about to spend another $100 on a new cylinder/head gasket and cam plug. I would love to not have to do this again.
"life's tough, but its tougher if your stupid" - my history professor
Last edited by siesta23; 12-30-2010 at 05:53 PM.