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Strange missing bit of metal on Head?

  • Thread starter Thread starter SilverBulletGS
  • Start date Start date
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SilverBulletGS

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Heres a pic, and in partcilar I have a question about my head that has this strange small missing section of metal (doesn't pierce) ..and a little bit of soot or something coming from that area. From my detectve work I already know there was a small carb fire, that seemed to melt the wiring harness ...

got a new-used wiring harness one from a 78' GS1000: will that will work on a 79'?

Any thoughts?
 
Are you talking about where one of the camshaft cap bolts has pierced through between the 2 intake manifolds?

Daniel
 
Strange one there. I'd pull off the valve cover straight away and have a peek.
 
I suspect the 78 wiring harness would work on your 79 if there are from the same models. although you should be aware there are two different models in both 78 and 79. one had self canceling turn signals (E model), the other did not (base model).

edit... there are three models in 1979. a GS1000N, a GS1000EN and the GS1000LN.
 
Last edited:
7981GS said:
Are you talking about where one of the camshaft cap bolts has pierced through between the 2 intake manifolds?

Daniel
Click to expand...

Can you clarify? I used a Q-tip to brush through the hole, and nothing has actually cut through the metal, looks cosmetic to me. But I could be wrong...

EDIT: I took a 3rd look, this time up close with a flashlight and did see threads/bolt up in there. That's not a big deal, I wouldn't think..

EDIT 2: Maybe I should remove the bolt and place some red rtv on the threads, reinstall bolt to prevent it from leaking oil while running?
 
Last edited:
rustybronco said:
I suspect the 78 wiring harness would work on your 79 if there are from the same models. although you should be aware there are two different models in both 78 and 79. one had self canceling turn signals (E model), the other did not (base model).

edit... there are three models in 1979. a GS1000N, a GS1000EN and the GS1000LN.
Click to expand...

No worries, I only care about the ignition. I'm not interested in lights. This is going to be strictly a bar-hopper bobber.
 
It looks like somebody put the wrong length bolt through the cam cover and tried too hard to get it to seat, blowing the bottom out of the hole. It doesn't look like enough metal is gone to cause an oil leak. There should never be oil in the screw hole of course. The only way that could cause a leak is if enough of the casting has broken off to tear a hole in the bottom of the oil gallery in which the cams live. That hole doesn't look large enough for that, so I'd call it a cosmetic issue only. Well, evidence of a PO's incompetence too. Nothing to do with a carb fire either.
 
Dogma said:
It looks like somebody put the wrong length bolt through the cam cover and tried too hard to get it to seat, blowing the bottom out of the hole. It doesn't look like enough metal is gone to cause an oil leak. There should never be oil in the screw hole of course. The only way that could cause a leak is if enough of the casting has broken off to tear a hole in the bottom of the oil gallery in which the cams live. That hole doesn't look large enough for that, so I'd call it a cosmetic issue only. Well, evidence of a PO's incompetence too. Nothing to do with a carb fire either.
Click to expand...

You got it doc! Thanks.
 
If oil was allowed to pool in that bolt hole and the bolt was tightened down it will hydraulically push out the bottom of the hole. I have seen it happen on 6mm case bolts. If you are concerned then just add a dab of JB weld to the outside of the hole.
 
SilverBulletGS said:
You got it doc! Thanks.
Click to expand...

You're welcome. That reminds me, how did you deduce it was a carb fire? Just the heat from the head will make the connectors in the harness soggy-looking, if that's what you're seeing. Route the new stuff high up in the frame, don't let it sag down below.

Some blame it on the stator leg that goes through that connector, or the ignition wire. Both carry some power, and a dirty connector will heat up. Some also say that the stock wires are a little light to carry the power.

Here's a sample from my 1000G, next to the replacement connector:
2010-05-18%25252022.54.47.jpg
 
Dogma said:
You're welcome. That reminds me, how did you deduce it was a carb fire? Just the heat from the head will make the connectors in the harness soggy-looking, if that's what you're seeing. Route the new stuff high up in the frame, don't let it sag down below.
Click to expand...

It looks a little charred =) ..still wondering if the 79 GS1000 and 78 are identical as far as charging and ignition goes. The manual wiring diagram looks the same, but I'm horrible at reading wiring diagrams.:confused:

When can I post more than one pic?
 
OK, that looks like a fire.

BassCliff has a tutorial for posting pics on his site, just below the flashing "read me" sign.
 
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