The 1947 - Present Chevrolet & GMC Truck Message Board Network

The 1947 - Present Chevrolet & GMC Truck Message Board Network (https://67-72chevytrucks.com/vboard/index.php)

- The 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board (https://67-72chevytrucks.com/vboard/forumdisplay.php?f=4)

- - Vacuum help! (https://67-72chevytrucks.com/vboard/showthread.php?t=510078)

vazquezguitarras

02-20-2012 01:31 PM

Vacuum help!

1 Attachment(s)

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

grs	02-20-2012 03:39 PM

Re: Vacuum help!

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

vazquezguitarras

02-20-2012 10:00 PM

Re: Vacuum help!

Quote:

Originally Posted by grs (Post 5200896)

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

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

gchemist

02-21-2012 02:17 AM

Re: Vacuum help!

Quote:

Originally Posted by INSIDIOUS '86 (Post 5202397)

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

Re: Vacuum help!

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

vazquezguitarras

02-21-2012 11:15 AM

Re: Vacuum help!

Quote:

Originally Posted by gchemist (Post 5202417)

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

vazquezguitarras

02-21-2012 11:15 AM

Re: Vacuum help!

Quote:

Originally Posted by INSIDIOUS '86 (Post 5202397)

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

Re: Vacuum help!

2 Attachment(s)

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

Re: Vacuum help!

Quote:

Originally Posted by motornut (Post 5202801)

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!

All times are GMT -4. The time now is 08:41 AM.