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Adventures in exhaust replacement

  • Thread starter Thread starter doctorgonzo
  • Start date Start date
doctorgonzo said:
It's for sale now that you mention it. Talking to one member about it, but nothing solid. On a side note. I know you are looking for an 8 valve 1100 head. I need one (or a 1000 head) if you run across more than the one you need, let me know. there are TWO 16 valve 1100 hundred heads on ebay right now, but not one 80 or greater 1000 head or 8 valve 1100 head.
Click to expand...
*I* am not looking for an 1100 head. And im not positive, but I think *maybe* JDPowel had one for sale. If not, I WILL keep an eye out for you. Lemme know if nothing happens with those pipes. Hows the right side pipe look?
 
chef1366 said:
Nathan
Take that head to a machine shop and get it fixed.
Click to expand...

What can they do.... I know they could extract the bolts, but what about the now 5 or 6 oversized holes.... can they do better than an insert?
 
They can fill and retap.
Either way you need to pull the head. If there is nothing wrong with your head besides the exhaust threads just get it fixed.
 
chef1366 said:
They can fill and retap.
Either way you need to pull the head. If there is nothing wrong with your head besides the exhaust threads just get it fixed.
Click to expand...

I know you're right... it was worth the couple hundred for a head to be able to get it re-built and ready to bolt on while still having the bike to ride with the old head, but no luck finding one in a hurry... so I may have to take that route, pulling it and taking to shop.
 
doctorgonzo said:
I know you're right... it was worth the couple hundred for a head to be able to get it re-built and ready to bolt on while still having the bike to ride with the old head, but no luck finding one in a hurry... so I may have to take that route, pulling it and taking to shop.
Click to expand...

Nope.. Called 3 machine shops and as soon as I said one had an extractor broken off in it they said "well nothing we can do, never get it drilled out".
 
doctorgonzo said:
Nope.. Called 3 machine shops and as soon as I said one had an extractor broken off in it they said "well nothing we can do, never get it drilled out".
Click to expand...

Nobody has a ram EDM anymore? You might have to look around for a non-automotive machine shop. Some shops even specialize in the various types of EDM. Even the smaller job shops used to have simple ones for burning out broken taps. They are sometimes called hole-poppers.
 
Dogma said:
Nobody has a ram EDM anymore? You might have to look around for a non-automotive machine shop. Some shops even specialize in the various types of EDM. Even the smaller job shops used to have simple ones for burning out broken taps. They are sometimes called hole-poppers.
Click to expand...

I'll try that. Thanks Dogma. I MAY have found a spare head as well.
 
exhaust bolt and oil

exhaust bolt and oil

I did a search looking for info on exhaust head bolts and oil and this thread came up - hope you don't mind it being pulled back out. I was chasing an oil leak that I thought was a head or valve cover gasket. It turned out the first exhaust head bolt on the ignition side of the motor was pushing oil past the bolt. In reading your thread, it rang similarly, I think the bolt had previously been tapped - the bolt is a little looser than the others - and had backed out some.

Is it normal for there to be oil pressure on the back of that bolt or do I have a head problem? The bike runs pretty well - even with the oil spray. I pulled the bolt, put some high temp RTV (orange) and some mild strength loctite on the bolt - seems to be ok on the oil leak.

I'm leaning toward the studs option too or drilling and wiring all the exhaust bolts - and fyi - www.[B]mcmaster[/B].com/ is an excellent source for hardware of all kinds - use them all the time on my racecar.

Just learning my way around the GS motor - oh yeah - '79 GS850G.

Thanks,
Jason.
 
timelapseracing said:
I did a search looking for info on exhaust head bolts and oil and this thread came up - hope you don't mind it being pulled back out. I was chasing an oil leak that I thought was a head or valve cover gasket. It turned out the first exhaust head bolt on the ignition side of the motor was pushing oil past the bolt. In reading your thread, it rang similarly, I think the bolt had previously been tapped - the bolt is a little looser than the others - and had backed out some.

Is it normal for there to be oil pressure on the back of that bolt or do I have a head problem? The bike runs pretty well - even with the oil spray. I pulled the bolt, put some high temp RTV (orange) and some mild strength loctite on the bolt - seems to be ok on the oil leak.

I'm leaning toward the studs option too or drilling and wiring all the exhaust bolts - and fyi - www.mcmaster.com/ is an excellent source for hardware of all kinds - use them all the time on my racecar.

Just learning my way around the GS motor - oh yeah - '79 GS850G.

Thanks,
Jason.
Click to expand...

Unless I'm WAY off base...the exhaust bolts DO NOT tap into an oil gallery...on anything, if so, I've never seen it? :-k Sounds like you have some blow-by that is showing itself as "said issue". Is it possible that your valve cover gasket is leaking and just looks as you describe?

EDIT: Well there's your answer. Thanks, DOC!
 
Last edited:
timelapseracing said:
I did a search looking for info on exhaust head bolts and oil and this thread came up - hope you don't mind it being pulled back out. I was chasing an oil leak that I thought was a head or valve cover gasket. It turned out the first exhaust head bolt on the ignition side of the motor was pushing oil past the bolt. In reading your thread, it rang similarly, I think the bolt had previously been tapped - the bolt is a little looser than the others - and had backed out some.

Is it normal for there to be oil pressure on the back of that bolt or do I have a head problem? The bike runs pretty well - even with the oil spray. I pulled the bolt, put some high temp RTV (orange) and some mild strength loctite on the bolt - seems to be ok on the oil leak.

I'm leaning toward the studs option too or drilling and wiring all the exhaust bolts - and fyi - www.mcmaster.com/ is an excellent source for hardware of all kinds - use them all the time on my racecar.

Just learning my way around the GS motor - oh yeah - '79 GS850G.

Thanks,
Jason.
Click to expand...

There is an oil passageway that passes under the valve bucket. On the exhaust side it gets very close to the bolt hole, close enough that drilling too deep in the process of putting in an insert can make a hole in it. That's where the oil is coming from. I'm living with my leak for the time being as I rebuild a salvaged head (with all good bolt holes) that I'm going to swap out.
 
doctorgonzo said:
There is an oil passageway that passes under the valve bucket. On the exhaust side it gets very close to the bolt hole, close enough that drilling too deep in the process of putting in an insert can make a hole in it. That's where the oil is coming from. I'm living with my leak for the time being as I rebuild a salvaged head (with all good bolt holes) that I'm going to swap out.
Click to expand...


Thanks - that was my guess - tho' I couldn't find a manual diagram in enough detail to see. I'm going keep an eye out for parts - but as long as oil isn't coming out I'll probably just watch plugs for a while. I'm not sure I want to put engine rebuild effort into this bike right now - but we'll see.

Cheers,
Jason.
 
timelapseracing said:
Thanks - that was my guess - tho' I couldn't find a manual diagram in enough detail to see. I'm going keep an eye out for parts - but as long as oil isn't coming out I'll probably just watch plugs for a while. I'm not sure I want to put engine rebuild effort into this bike right now - but we'll see.

Cheers,
Jason.
Click to expand...

If it's not leaking you are probably fine. Mine had multiple other issues.
 
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