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General Discussion => Q & A => Topic started by: 35chevcoupe on March 14, 2023, 09:03:12 PM

Title: exhaust heat riser valve ?
Post by: 35chevcoupe on March 14, 2023, 09:03:12 PM

Hey all , what's everyone doing for the heat riser valve ?  Is there a company that rebuilds them ? Are most guys just welding up the butterfly shaft holes and using them as a spacer ?  My exhaust systems will be here in a couple days and was curious as to what everyone is doing .

Title: Re: exhaust heat riser valve ?
Post by: schlepcar on March 15, 2023, 07:16:36 AM

I think it is better to weld it but some are worn out to the point that they may leak around the shaft. If you have one that is not bad shape you might consider using a worn out one for welding shafts solid. They are hard to find in nice shape and easy to change if you had to. On the down side if it gets stuck mostly shut it can be a problem child. I have a small leak that I am hearing and that is likely my issue. I am pretty sure the riser is the same for non GS.

Title: Re: exhaust heat riser valve ?
Post by: Jimbo on March 15, 2023, 09:07:46 AM

I removed the shaft and butterfly and welded the 2 holes.

Title: Re: exhaust heat riser valve ?
Post by: cwmcobra on March 15, 2023, 10:23:19 AM

I left the shaft and just removed the butterfly.

Title: Re: exhaust heat riser valve ?
Post by: telriv on March 15, 2023, 02:30:48 PM

The way we use our vehicles today the heat riser for the most part is a mute subject, not un-nessasery.
Just weld/grind/finish it up as nicely as you can & be done with it.
Just my thoughts on this subject.

Tom T.

Title: Re: exhaust heat riser valve ?
Post by: 35chevcoupe on March 16, 2023, 10:01:51 AM

Thanks guys for the info/comments .  I have a couple used ones here that i think ill just weld the holes shut and go with it . The one thing i,m concerned with is there going to be points taken away when or IF i have the car judged and they see its not operational ?
If i had the big weight that was supposed to be on the butterfly shaft id just weld it all in place and the butterfly out of it so that it appears functional but both the weights are missing on mine .
But OH WELL  like Dan says its easy to change later .

Title: Re: exhaust heat riser valve ?
Post by: Jim on March 16, 2023, 10:21:52 AM

Maybe tap and set screw the holes that way it would be easy to bush the holes later if you found the right butterfly.jim

Title: Re: exhaust heat riser valve ?
Post by: cwmcobra on March 16, 2023, 12:08:04 PM

John,

No points deducted from the Verde Howitzer at either BCA or AACA events.

Chuck