1986 Chevy Suburban Heat Riser Question? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Mr Chevy · 09-07-2015, 01:11 PM

1986 Chevy Suburban Heat Riser Question?

My 86 Burb has a vac operated heat riser on the pass side exhaust.

My question is without vac is it in the Closed? or Open? position.

Im not going to be using it and I wanted to make sure that if I simply put a vac cap over the vac port of the Heat Riser that it is in the OPEN position and not closed.

Thanks in advance for your response.

Barbecue · 09-09-2015, 04:28 PM

When the vac is disconnected, the butterfly valve remains in the open position. I just disconnected the vac line and left the heat riser valve in place. You should be good to go with your plan.

09-07-2015, 01:11 PM	#1
Mr Chevy and son Join Date: Apr 2008 Location: Hagerstown Maryland 21740 Posts: 81	1986 Chevy Suburban Heat Riser Question? 1986 Chevy Suburban Heat Riser Question? My 86 Burb has a vac operated heat riser on the pass side exhaust. My question is without vac is it in the Closed? or Open? position. Im not going to be using it and I wanted to make sure that if I simply put a vac cap over the vac port of the Heat Riser that it is in the OPEN position and not closed. Thanks in advance for your response. __________________ 1970 C10 8ft Fleetside The build thread: http://www.67-72chevytrucks.com/vboa...d.php?t=289628 1986 GMC 3500 2wd CrewCab Dually 454 1994 Chevy 2500 2wd Ext Cab 8ft bed

09-09-2015, 04:28 PM	#2
Barbecue Registered User Join Date: Jul 2014 Location: British Columbia Posts: 84	Re: 1986 Chevy Suburban Heat Riser Question? When the vac is disconnected, the butterfly valve remains in the open position. I just disconnected the vac line and left the heat riser valve in place. You should be good to go with your plan.



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