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General Category >> Rubber Side Down! >> Header Bolt
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Message started by Guido on 08/07/06 at 18:08:46

Title: Header Bolt
Post by Guido on 08/07/06 at 18:08:46

My inboard header bolt will not stay torqued!! >:( I torque it at room temp and take it for a short ride......let it cool and check and it's loose again!!
I was chasing a backfiring problem. When the engine is cool it won't backfire, but as it warms up it does, hence the header bolt backing out causing and exhaust leak. Right?

How in the world do you get it to stay torqued without over doing it? ???

Title: Re: Header Bolt
Post by Brewbrother on 08/07/06 at 18:14:47

check your slip on muff connection?? Parts can transmit a lack of torque. draw a line to understand.

Title: Re: Header Bolt
Post by Guido on 08/07/06 at 18:44:55

Do you mean, if the muff isn't lined up right, the header bolt won't hold torque?
The last time I did it I unbolted the muff from the bracket first, then backed off the header bolts and re-torqued, then tightened the muff bolts on the bracket.
Everything seemed to line up okay, didn't have to tug one way or the other to get the muff bolts to line up.

Title: Re: Header Bolt
Post by vroom1776 on 08/08/06 at 09:45:31

um, what kind of muffler are you using? do you need a 10 degree adapter?

Title: Re: Header Bolt
Post by 911radioman on 08/08/06 at 11:41:03

I think I read where he's running a Jardine, IIRC.

Title: Re: Header Bolt
Post by Guido on 08/10/06 at 15:17:35

Okay, I think I got the header bolt to stay put for now. I'm running the Jardine( see bottom for the rest), 1 1/2 turns out on the mix screw. Still getting an intermittent back-fire between shifts. Sometimes a POP POP. But I can twist the throttle full open and snap shut and it won't do it!!! I can short shift and it won't do it!! Is the carb "loading-up"? Or should I shave the spacer more? Or go up a main jet or pilot jet size?