Vacuum help! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

vazquezguitarras · 02-20-2012, 01:31 PM

Hello boys! Need help with this. Anyone know where this is connected and serving? Thank you!

grs · 02-20-2012, 03:39 PM

Show a picture of the whole thing that it is connected to.

vazquezguitarras · 02-20-2012, 10:00 PM

Quote:

Originally Posted by grs

Show a picture of the whole thing that it is connected to.

This valve opens and closes a gate housed in the exhaust manifold, but no where to connect the outlet hose. Thank you very much for your help!

INSIDIOUS '86 · 02-21-2012, 01:57 AM

Looks like the heat riser. Closed when engine is cold and pushe exhaust through the head and warms thi intake and engine faster. Then opens once engine is fully warmed
Posted via Mobile Device

gchemist · 02-21-2012, 02:17 AM

Quote:

Originally Posted by INSIDIOUS '86

Looks like the heat riser. Closed when engine is cold and pushe exhaust through the head and warms thi intake and engine faster. Then opens once engine is fully warmed
Posted via Mobile Device

We have a winner!! The diverted exhaust warmed up the carb. Think of it as an EGR valve at idle when the engine is cold. Vacuum was controlled by a thermatic thinging on the intake air cleaner housing.

vazquezguitarras · 02-21-2012, 11:14 AM

Thanks guys, but I still do not understand where you connect the valve to run this system.

vazquezguitarras · 02-21-2012, 11:15 AM

Quote:

Originally Posted by gchemist

We have a winner!! The diverted exhaust warmed up the carb. Think of it as an EGR valve at idle when the engine is cold. Vacuum was controlled by a thermatic thinging on the intake air cleaner housing.

Thanks guys, but I still do not understand where you connect the valve to run this system.

vazquezguitarras · 02-21-2012, 11:15 AM

Quote:

Originally Posted by INSIDIOUS '86

Looks like the heat riser. Closed when engine is cold and pushe exhaust through the head and warms thi intake and engine faster. Then opens once engine is fully warmed
Posted via Mobile Device

Thanks guys, but I still do not understand where you connect the valve to run this system.

motornut · 02-21-2012, 11:23 AM

could run off a thermal switch on the stat housing
maybe you have seen this type,same idea

vazquezguitarras · 02-22-2012, 09:09 PM

Quote:

Originally Posted by motornut

could run off a thermal switch on the stat housing
maybe you have seen this type,same idea

Thank you very much, your contribution was of great help!

02-20-2012, 01:31 PM	#1
vazquezguitarras Registered User Join Date: May 2011 Location: Buenos Aires-Argentina Posts: 87	Vacuum help! Hello boys! Need help with this. Anyone know where this is connected and serving? Thank you! Attached Images

02-20-2012, 03:39 PM	#2
grs Registered User Join Date: Jan 2010 Location: Roanoke, Tx. Posts: 1,561	Re: Vacuum help! Show a picture of the whole thing that it is connected to.

02-21-2012, 01:57 AM	#4
INSIDIOUS '86 Registered User Join Date: Jul 2009 Location: washington Posts: 4,178	Re: Vacuum help! Looks like the heat riser. Closed when engine is cold and pushe exhaust through the head and warms thi intake and engine faster. Then opens once engine is fully warmed Posted via Mobile Device __________________ 377 sbc thumpr cam autogear m23 muncie 3:73 Detroit trutrac 3''spintech prostreet mufflers xpipe 1 3/4 headers build thread !http://67-72chevytrucks.com/vboard/s...d.php?t=577217 Iroc gauge threadhttp://67-72chevytrucks.com/vboard/s...d.php?t=554511

02-21-2012, 11:14 AM	#6
vazquezguitarras Registered User Join Date: May 2011 Location: Buenos Aires-Argentina Posts: 87	Re: Vacuum help! Thanks guys, but I still do not understand where you connect the valve to run this system.

02-21-2012, 11:23 AM	#9
motornut 78K & 79C Jimmys Join Date: Nov 2009 Location: Ottawa Ont CANADA Posts: 7,901	Re: Vacuum help! could run off a thermal switch on the stat housing maybe you have seen this type,same idea Attached Images __________________ John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350



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