72 Quadrajet - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**BigBird05** · 01-04-2021, 11:03 AM

Does anybody have pictures of a 1972 Quadrajet. I am looking for pictures of the throttle linkage and chock pull off.

joeydurango · 01-07-2021, 01:28 AM

Here are a few. These are from years ago, when I first bought my truck... and before I pulled anything apart or rebuilt or adjusted anything. No "after" photos, unfortunately.

**BigBird05** · 01-07-2021, 09:23 AM

Thanks that is what I am looking for.

**Rich72C10** · 01-07-2021, 10:58 AM

joeydurango - (sorry to highjack) on your air breather - what is the pip coming off the tail called and where does it go? I am missing that!

NM, when to this thread to figure this out! http://67-72chevytrucks.com/vboard/s....php?p=8860294

joeydurango · 01-07-2021, 01:08 PM

Hey Rich,

If you're talking about the black metal tube coming off the intake snorkel, on the other end that's connected to outside of the driver's side exhaust manifold. I believe it's called a heat riser tube. In the snorkel is a bimetallic butterfly valve; once warmed up it changes position to close the heat riser tube and open the snorkel to outside air.

The idea is that warm air, heated quickly by the exhaust manifold, will held the engine warm up during cold starts. Once warm, the valve changes position and cold air is used instead.

Mine works well. I hear those valves have a lot of issues. If your truck handles cold starts well I wouldn't worry too much about it.

01-04-2021, 11:03 AM	#1
BigBird05 Senior Member Join Date: Aug 2019 Location: Cheraw Posts: 1,305	72 Quadrajet Does anybody have pictures of a 1972 Quadrajet. I am looking for pictures of the throttle linkage and chock pull off.

01-07-2021, 01:28 AM	#2
joeydurango Registered User Join Date: Dec 2013 Location: Durango, CO Posts: 825	Re: 72 Quadrajet Here are a few. These are from years ago, when I first bought my truck... and before I pulled anything apart or rebuilt or adjusted anything. No "after" photos, unfortunately. Attached Images __________________ 1972 K10 Cheyenne Super \| LWB, fleetside \| 350/350/205 \| KEEPER 1971 K10 Cheyenne \| SWB, fleetside \| LS Swap 5.3/4L60 \| SOLD 1976 Trans Am \| 400/4-spd \| SOLD 1976 Trans Am \| 455/4-spd \| TOTALED

01-07-2021, 09:23 AM	#3
BigBird05 Senior Member Join Date: Aug 2019 Location: Cheraw Posts: 1,305	Re: 72 Quadrajet Thanks that is what I am looking for.

01-07-2021, 10:58 AM	#4
Rich72C10 Mr. Cheyenne Join Date: Jun 2020 Location: Kyle, Texas Posts: 1,644	Re: 72 Quadrajet joeydurango - (sorry to highjack) on your air breather - what is the pip coming off the tail called and where does it go? I am missing that! NM, when to this thread to figure this out! http://67-72chevytrucks.com/vboard/s....php?p=8860294 __________________ Richard *'72 Chevy C10 Cheyenne Super WHT/MED BRONZE/WHT SBC 350 \| TH350 \| LWB \| AC \| Buddy Seats Upgrades:** Tilt \| Front Sway Bar \| Radio \| Sliding Window \| Bed Spare w/Lock Bed Rails \| Full LEDs \| Courtesy Lights \| Tachometer \| Glovebox Lock & Light \| Head Light Relays \| Upgraded Fully Super Trim Last edited by Rich72C10; 01-07-2021 at 11:45 AM.*

01-07-2021, 01:08 PM	#5
joeydurango Registered User Join Date: Dec 2013 Location: Durango, CO Posts: 825	Re: 72 Quadrajet Hey Rich, If you're talking about the black metal tube coming off the intake snorkel, on the other end that's connected to outside of the driver's side exhaust manifold. I believe it's called a heat riser tube. In the snorkel is a bimetallic butterfly valve; once warmed up it changes position to close the heat riser tube and open the snorkel to outside air. The idea is that warm air, heated quickly by the exhaust manifold, will held the engine warm up during cold starts. Once warm, the valve changes position and cold air is used instead. Mine works well. I hear those valves have a lot of issues. If your truck handles cold starts well I wouldn't worry too much about it. __________________ 1972 K10 Cheyenne Super \| LWB, fleetside \| 350/350/205 \| KEEPER 1971 K10 Cheyenne \| SWB, fleetside \| LS Swap 5.3/4L60 \| SOLD 1976 Trans Am \| 400/4-spd \| SOLD 1976 Trans Am \| 455/4-spd \| TOTALED



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