Air coming out the oil cap.

I just started the bike for the first time after doing a rebuild and for some reason now i have a ton of air coming out the oil cap. I dont remember if this is normal. I plan to do a compression test but i habe a feeling it will fail.

Any advice?

 

It's normal, thats why you need ventilation (the hose that goes to the airbox on the other side of the engine).

 

Compression test is 150 for 1 2 and 4. 3 is at 130. Going to check the valve shims. I dont get why 3 doesn't match. same valve shims and its a new laped valve.

 

All shims are in spec.... i really dont want to pull the head back off.

 

I think 12 and 4 is quite high, 3 is normal. Maybe you should try another compression tester. You can also put some oil in to se how much it increases.

 

If you rebuilt as stated...run it for awhile things like rings need to seat in ...130 is not to bad ...did you put a little oil in cylinder and try again see if it comes up...this will tell you if it is rings if it goes up. Another did you have throttle wide open when you cranked over engine?

 

I did that and the numbers didnt change. I ran the motor again amd reved it to like 5k rpms in small spurts. Then i noticed oil was burning and coming out the exhaust on both sides. I let it run thinking the smoke might be the assembly lube burning. So i let it idle at 1500 rpms. Then i noticed an oil leak from the cylinder head.

Before i did all this i replaced the oil and from running it for 20 mins now my oil is murky. Does it sound like its fouled piston rings? Or could the leaking gasket cause the oil to burn.

 

Oh dear you might have a leaking base gasket or head gasket you need to trace its source.

 

its the head gasket ;(

 

hopefully someone can answer this... would me possible missing the camshaft chain tunnel gasket cause the leak?

 

if it wouldn't cause a leak, there wouldn't be a gasket there in the first place

 

Yes.

Gary H.

 

Uh... Yeah---- especially strange to me that it seems like you already know it's not there.....

 

The gasket i got from len he said it was now intergrated into the head gasket and wasnt needed. I thougbt it was odd too...

 

Upon assembly you should have been able to tell whether the gasket was integrated or not. If not I would have called Len and sent him a picture of the installed gasket for clarification. Len absolutely would not have let you continue the assembly incorrectly.

Gary H.

 

I am not pointing fingers... Shit happens. There are threads with head gasket issues and so forth. I've read them... and asked about them. Did my due diligence. If this was a new gasket maker he was trying then guess what it didnt work.

I'll still sleep tonight and so will my wife cause the bike still isnt running

 

Sybe,
Chill out man. Nobody is accusing you of anything. This isn't that kind of forum. I'm suggesting you get in touch with Len to better resolve the issue. Your call.

Gary H.

 

The threads that I saw indicated you got your gaskets from Len, then you had to take the block apart again to resolve an o-ring issue and accidentally tore the gasket . . . Is the torn gasket (that we assume is repaired) the gasket in question?

 

All new gaskets. The issue here could be the gasket or it could be a warped head. Before everyone jumps the gun and say its the gasket let me check.

Yes the kit i got didnt come with a cam tunnel gasket. It was suposed to be intergrated. Could this be the issue... Yes. Could the head gotten warped... Yes. Could the gasket gotten damaged during reassembly, dissambly and reassembly... yes.

What i really want to know and part of my original question is could a bad or dislodged piston ring cause the head gasket to leak. I need to know how far i should dig.

 

The only thing that causes a head gasket to leak is a warped head (gasket can't seal), or a blown gasket (many causes, but broken rings isn't one of them).

 

Thanks, my fingers are crossed that its not warped.