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**** I struck oil while drilling out an exhaust stud

  • Thread starter Thread starter thausen
  • Start date Start date
oil passage

oil passage

Last post on this and then I am considering it done. I am far from a college kid...Im nearly 40 yrs old. Here is how I look at things...I have owned Triumph, Suzuki, Harley, Yamaha and Kawasaki bikes. With each bike, came a new forum I joined. I am a 23 yr veteran of an OEM paint supplier doing tech svc/sales every day. I build bikes as a hobby. My outlook on these forums are that they are a non-biased comunity of guys sharing a common interest and hobby. I do not judge anyone for asking a question or attempting to try something that may have never been done. I actually enjoy it and learn from others experiences. Sometimes I ask questions that may be very "simple" and "obvious" to some. I have found that keeping an open mind allows me to find various routes to an end. I find it very aggrevating when someone tries to make me sound ignorant for at least trying a simple fix first. Why not take what people suggest as just that ....suggestions. Now...Im gonna go chew some gum and put it on my head bolt....THE END
 
Let him chew his gum..He has built bikes from the ground up in one post toughting his skills and then he post that its a hobby..whatever.
 
Considering I just got a text from my friends parents where I usually stay saying their family is coming to down this week for their sons wedding and I need to find living arrangments since all their spare stuff is going to their son whos getting married's house... and I didn't sleep last night, and I had a chapter with 110 homework questions for calc AND had to finish my 8 page Philisophy essay AND STILL have to make my observations with the stars tonight for astronomy I'd say really ****ty.

If I could drink myself into a coma right now I honestly would. I don't know what to do anymore, **** just isn't working the way it should for me and the last thing I need is to worry about is a place to live near school that I can afford.

Thank god for pain meds or I'd be really depressed right now.
 
If we came off as condesending my apologizes.
I just gave my opinion of a good fix. But we all know that opinions are like..................
 
opinion

opinion

Thanks for your opinion. I appreciate the fact that I get them, that's what I am here for. Hoping that the quick fix does what I need it to..but if not I will pull the head. So far I'm ok.
Todd
 
Thanks for your opinion. I appreciate the fact that I get them, that's what I am here for. Hoping that the quick fix does what I need it to..but if not I will pull the head. So far I'm ok.
Todd


JB Weld on the threads should work fine. I think the slow set formulation is stable enough at head temps to provide a decent seal and it will also be trapped in the threads. I don't see a problem. If the cylinder head temp exceeds the 600 deg capability of JB, you have a much more serious problem anyhow. :) I wouldn't try to "glue" a stud in an oversize hole with JB, but as a thread seal, no problem.

Earl
 
Couple of points:

1) On a GS850, there is little to no oil pressure to speak of, and certainly not in the top of the engine. The way I usually explain it is that on the roller bearing engines, the oil pump just pushes oil around and up to the cylinder head. The cams then splash oil around. Oil gets pumped up at the back of the engine along the outer studs, and the passages at the front of the engine function as gravity drains that dump into the cam chain tunnel.

2) The oil passage that he drilled into must remain open. It's a large passage, but many of the proposed repairs would or could block it. But I think there's also some room for error here -- as long as the passage is mostly open, a little intrusion by a stud isn't going to hurt anything.


Therefore, I'd have to agree that the OP did exactly the right thing. JB weld epoxy to seal the threads, install a stud, and ride. As long as he took a bit of care to make sure there wasn't a big glob of JB Weld on the end of the stud, it should be all good.
 
oil passage

oil passage

Wow....great info ! I was hoping the same thing that the oil pressure at this point would be minimal to nearly nothing. I did not thread the bolt deep into the head but started about 1/8" from the end with the JB weld to seal the threads well. I did not wallow the hole at all and it appears to be well sealed. So far so good. One other thing I found out....I went by and spoke to a master engine mechanic (bikes) who is a friend of mine. I remembered him mentioning that old BMW bikes had studs that actually passed through oil passageways. He suggested to seal with aircraft quality bolt sealant (hi temp silicone type). That's what he has always used successfully on those bikes.
 
Some BMW cars have the exhaust studs drilled through, they usually don't leak. Most folks seal the studs in with Locktite.
 
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