Topic: Oil in the exhaust...HELP

[squirley]

So, I have my rebuilt engine put back together.  It is a 74 550 with a ported head and 650 cam.  I started it up for the first time a few days ago and it sounded great and ran fine.  I let it run for a couple minutes and then shut her down.  Today I re-timed it to get it spot on and fired it up again.  I let it run for a couple minutes and then saw that it was beginning to smoke. Long story short, there is oil in my exhaust.  What am I looking at here as the possible causes.

I am thinking

-Bad valve guide
-Valve guide not sealed

Besides these, what should I be looking for?

[martino1972]

first thing would be pulling the plugs and see what cylinder is doing it...
is it even running on all 4???
what do you mean with rebuild engine,bored out,new pistons/rings etc. or only head work etc.
please give more detail on what excacly got done to the engine....

[Hush]

I can just hear the welding torch heating up Marti.

[hymodyne]

when I had oil coming out of an exhaust, it was because of middle rings installed upside down...

really interested in how the 650 cam works...
hym

[squirley]

Sorry, didn't think that the bore would matter on this one.  It is to stock specs, just new stuff put in down there.

I will pull the plugs to see which one is oil fouled, it was too late last night and I felt like calling it quits after this happened.  All four cylinders are running, bike idles and revs fine.  Number one exhaust is much hotter than 3 and four, and I think that it is overly hot, rather than 3 and 4 not being hot enough.  There is a slight popping coming from the exhaust, but I am leaning on an exhaust leak on this and don't think it has to do with the faulty cylinder.

[squirley]

Anyone have any advice on what to look out for?

[martino1972]

well,i understand you put in new pistons,or atleast new rings....
like i said,i would check the plugs,they should tell you what cylinder is doing it,and im afraid you will have to take it apart again,and see if maybe a ring broke,or installed wrong.....

[squirley]

oh, I am definately taking it apart again. I was just curious if anyone had anymore suggestions on what to look for aside from what the original post says.

[JoshuaJames]

what was the problem? did you get it sorted?

I may have a similar problem with my bike, but wont know until new points come in. Can you update me on the situation, and how much the repair ran you?


thanks