Gunk in manifold

[sho thing]

Gunk in intake manifold

Well, since I'm here, I just took off my manifold, and there's a bunch of oil and gritty crap in it. The gritty part is almost all in the secondaries, the primaries have just oil. It was like this the last time I took the manifold off. The line coming from the PCV on the front valve cover is dry. The line coming from the top of the crankcase is dirty, but not saturated and clogged with gunk as one would expect in order to be putting this much stuff into the intake.

Is this bad rings? Valve guides or seals? The engine stumbles a lot when I give it much gas below 3100 rpm, but is ok with light pedal. I can stomp on it above 3100, and it idles fine.

http://students.washington.edu/kite/manifold oil 004-sm.jpg
http://students.washington.edu/kite/manifold oil 001-sm.jpg

 

[93nighthawk]

Pic Don't work. What is the problem.

 

[Mr Anonymous]

Get some Berryman's B-12 chemtool at your favorite auto parts store and clean it.

The PCV source to the intake is on the bottom of the throttle body. The line from the valve cover is just the fresh air source. FWIW, if you remove the spaces in your file names, the IMG tags should work OK.

 

[93nighthawk]

Get some Berryman's B-12 chemtool at your favorite auto parts store and clean it.

And a couple cheap tooth brushes. Speeds things up quite a bit. Normal carbon buildup in the intake due to EGR and PVC.

 

[sho thing]

sorry folks, I meant to hit "preview" there. I just edited the post. I was trying to figure out the embedded picture thing. Normal HTML tags don't work. I'll have to go with pain old url's for now.

Another thing I forgot to mention is that the engine consumes mass quantities of oil. About a quart every 600 miles. Would this be part of the same problem? I know there are a couple leaks that I'm hoping to get to when the clutch comes off in the next couple days.

 

[yamahaSHO]

The PCV does not cause most of that near the heads... I started to get it with my PCV routed to the exhaust. Its the tiny overlap in the cams... really prevelant with stage 2 cams.