Exhaust manifold Butterfly on 72 K10 ?? Driver Side - The 1947 - Present Chevrolet & GMC Truck Message Board Network

flashed · 11-01-2020, 02:16 AM

Anyone know what Im talking about and where to get one ? Trying to get my truck back together and it didnt have one to start with . Had a Donut gasket squeezed in there . Any help much appreciated .

i82much · 11-01-2020, 10:16 AM

heat riser valve. i had one installed by a local muffler shop, they had it in stock.

flashed · 11-01-2020, 10:30 AM

That helps me a lot knowing what it's called. Thanks . Will check with my local shop tomorrow .

hotsam · 11-01-2020, 10:43 AM

I may have a spare one. I'd have to check and see and also what kind of shape it was in . you would be welcome to it free. If shipping wouldn't kill you on it.

i82much · 11-01-2020, 10:49 AM

it is helpful for cold weather, but you can’t have the crossover blocked.

**Corts60** · 11-01-2020, 01:12 PM

As mentioned above, if the intake manifold gaskets have the block off plates installed, then there is no point to put that exhaust valve back in. Plus you would need the thermostatic valve that controls it.

i82much · 11-01-2020, 05:54 PM

Quote:

Originally Posted by Corts60

As mentioned above, if the intake manifold gaskets have the block off plates installed, then there is no point to put that exhaust valve back in. Plus you would need the thermostatic valve that controls it.

by “thermostatic valve” do you mean the bimetallic coil on the heat riser valve itself, or something else? i thought the coil came with the valve, but maybe you are referring to something else?

also, i think there may be vacuum operated exhaust valves but not sure if those are oem or appropriate for your application.

**Stocker** · 11-01-2020, 07:22 PM

It may not make a difference, but my K20's heat riser valve was on the passenger's side. It was giving trouble many years ago (too long ago for me to remember) and I ended up removing it. Haven't missed it one bit. The truck needs to warm up a little in cold weather, but it did before anyway.

flashed · 11-01-2020, 11:03 PM

Quote:

Originally Posted by hotsam

I may have a spare one. I'd have to check and see and also what kind of shape it was in . you would be welcome to it free. If shipping wouldn't kill you on it.

I would gladly pay shipping if you have it plus some , just want to get it together .

REDROCKER652002 · 11-01-2020, 11:27 PM

If nobody else has one, i think i have one from my son's 69. I was not hooked up, so not sure if it is complete, but I can send pics if need be.

hotsam · 11-02-2020, 12:37 AM

Quote:

Originally Posted by flashed

I would gladly pay shipping if you have it plus some , just want to get it together .

I'll check tomorrow for you

hotsam · 11-02-2020, 05:25 PM

I looked and I do not have a spare one on my old chassis. Sorry !

11-01-2020, 02:16 AM	#1
flashed Registered User Join Date: Oct 2009 Location: canton ga Posts: 12,724	Exhaust manifold Butterfly on 72 K10 ?? Driver Side Anyone know what Im talking about and where to get one ? Trying to get my truck back together and it didnt have one to start with . Had a Donut gasket squeezed in there . Any help much appreciated .

11-01-2020, 10:16 AM	#2
i82much Registered User Join Date: Jul 2008 Location: Bowie, MD Posts: 313	Re: Exhaust manifold Butterfly on 72 K10 ?? Driver Side heat riser valve. i had one installed by a local muffler shop, they had it in stock.

11-01-2020, 10:30 AM	#3
flashed Registered User Join Date: Oct 2009 Location: canton ga Posts: 12,724	Re: Exhaust manifold Butterfly on 72 K10 ?? Driver Side That helps me a lot knowing what it's called. Thanks . Will check with my local shop tomorrow .

11-01-2020, 10:43 AM	#4
hotsam Registered User Join Date: Mar 2013 Location: East TN. Posts: 371	Re: Exhaust manifold Butterfly on 72 K10 ?? Driver Side I may have a spare one. I'd have to check and see and also what kind of shape it was in . you would be welcome to it free. If shipping wouldn't kill you on it. __________________ 1972 k10 Custom 10 Deluxe, short bed 4x4, 454, 4 speed (Sold) 1985 K30 Dump Truck 1986 Jeep CJ-7 1955 2 door 210 post

11-01-2020, 10:49 AM	#5
i82much Registered User Join Date: Jul 2008 Location: Bowie, MD Posts: 313	Re: Exhaust manifold Butterfly on 72 K10 ?? Driver Side it is helpful for cold weather, but you can’t have the crossover blocked.

11-01-2020, 01:12 PM	#6
Corts60 Just here to tinker Join Date: Jun 2008 Location: Holland, MI Posts: 3,697	Re: Exhaust manifold Butterfly on 72 K10 ?? Driver Side As mentioned above, if the intake manifold gaskets have the block off plates installed, then there is no point to put that exhaust valve back in. Plus you would need the thermostatic valve that controls it. __________________ 78 C10 SWB Diesel #1 (wrecked)http://67-72chevytrucks.com/vboard/s...1978+silverado 78 C10 SWB Diesel #2 (sold)http://67-72chevytrucks.com/vboard/s...d.php?t=650751 60 GMC Suburban (sold)http://67-72chevytrucks.com/vboard/s...d.php?t=445526 60 GMC 1000 (sold)http://67-72chevytrucks.com/vboard/showthread.php?t=298235 67 GMC 1500 (sold) http://67-72chevytrucks.com/vboard/s...d.php?t=803695 73 Chevy C20(Daily)http://67-72chevytrucks.com/vboard/s...d.php?t=852767 86 Suburban(summer unit) http://67-72chevytrucks.com/vboard/s...d.php?t=810697 88 Suburban 4x4(sold)

11-01-2020, 07:22 PM	#8
Stocker 20' Daredevil (Ret) Join Date: May 2003 Location: Jefferson State Posts: 13,722	Re: Exhaust manifold Butterfly on 72 K10 ?? Driver Side It may not make a difference, but my K20's heat riser valve was on the passenger's side. It was giving trouble many years ago (too long ago for me to remember) and I ended up removing it. Haven't missed it one bit. The truck needs to warm up a little in cold weather, but it did before anyway. __________________ - Mike - 1972 K20 LWB 350/350/205 RIP El Jay

11-01-2020, 11:27 PM	#10
REDROCKER652002 Registered User Join Date: Nov 2018 Location: South San Francisco CA, Posts: 441	Re: Exhaust manifold Butterfly on 72 K10 ?? Driver Side If nobody else has one, i think i have one from my son's 69. I was not hooked up, so not sure if it is complete, but I can send pics if need be.

11-02-2020, 05:25 PM	#12
hotsam Registered User Join Date: Mar 2013 Location: East TN. Posts: 371	Re: Exhaust manifold Butterfly on 72 K10 ?? Driver Side I looked and I do not have a spare one on my old chassis. Sorry ! __________________ 1972 k10 Custom 10 Deluxe, short bed 4x4, 454, 4 speed (Sold) 1985 K30 Dump Truck 1986 Jeep CJ-7 1955 2 door 210 post



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