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#1 |
Registered User
Join Date: Jan 2010
Location: Here
Posts: 5,483
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Heat stove and heat riser question
I've only had 67s recently so I know 67s had a heat riser by the exhaust manifold but 67 never had the heat stove on the manifold to the air cleaner. When they added the heat stove to most 69 models did they have both the heat stove and the heat riser going forward or was it 1 or the other each seperate?
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#2 |
20' Daredevil (Ret)
![]() Join Date: May 2003
Location: Jefferson State
Posts: 13,623
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Re: Heat stove and heat riser question
All I know is my '72 had a heat riser on the passenger side exhaust (removed many years ago) and the stove on the intake which operates the choke on the Quadrajet.
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- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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#3 |
Senior Member
![]() Join Date: Feb 2009
Location: Northern Nevada
Posts: 7,230
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Re: Heat stove and heat riser question
1971 402 at least had a stove and pipe. Expedites carb. air temperature, part of the cold start system. Some notes:
The thermostatically controlled air cleaner operations are found in the 1971 service manual page areas 6M-19. The thermal sensor and diaphragm motor work with the heat stove and pipe to control carburetor air temperature. The assembly is designed to maintain carburetor air temperature passed through the air cleaner’s snorkel @ 100F or more. The thermostatic air cleaner is tested with under-hood temperatures below 85F: • With engine off -The snorkel’s damper door should be opened. • With engine running, vacuum applied, and air temperature below 85F - The snorkel’s damper door should be closed. • With engine on, vacuum applied, and air temperature above 85F - The snorkel’s damper door begins to open @ 85F.
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Tony 71 Custom Deluxe, SWB, 2WD, 402, A/C. I developed an assembly kit for restoring the (a) truck from the ground up. My build thread, and more on the assembly kit https://67-72chevytrucks.com/vboard/...d.php?t=730025 Last edited by 71CHEVYSHORTBED402; 08-13-2024 at 06:27 PM. |
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#4 |
Registered User
Join Date: Jan 2010
Location: Here
Posts: 5,483
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Re: Heat stove and heat riser question
OK thanks. Just wasn't sure if both came together or separate.
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#5 |
Registered User
Join Date: Oct 2005
Location: Overland Park, Ks.
Posts: 5,216
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Re: Heat stove and heat riser question
My 72 with 350 engine never had a heat riser valve. It has the heat stove to the air intake.
George |
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#6 |
Senior Member
![]() Join Date: Feb 2009
Location: Northern Nevada
Posts: 7,230
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Re: Heat stove and heat riser question
Cool, didn't know that. I updated my post to include 402, though seems some 350 had a stove and pipe.
__________________
Tony 71 Custom Deluxe, SWB, 2WD, 402, A/C. I developed an assembly kit for restoring the (a) truck from the ground up. My build thread, and more on the assembly kit https://67-72chevytrucks.com/vboard/...d.php?t=730025 |
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#7 |
20' Daredevil (Ret)
![]() Join Date: May 2003
Location: Jefferson State
Posts: 13,623
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Re: Heat stove and heat riser question
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__________________
- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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#8 |
Senior Member
![]() Join Date: Dec 2009
Location: TN.
Posts: 8,082
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Re: Heat stove and heat riser question
I remember a Black truck in a Time capsule thread.
I think (Pretty Sure) it was a 67? It had a lot of pictures. I have searched High and low and still have not found it. Best I recall, It had under hood pictures. ![]() ![]() ![]()
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________________________________________________________________________________________ ____________________________________________ 84 Chevy K-20 63 Impala (my high school car) http://67-72chevytrucks.com/vboard/s...Crew Cab Build |
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#9 |
20' Daredevil (Ret)
![]() Join Date: May 2003
Location: Jefferson State
Posts: 13,623
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Re: Heat stove and heat riser question
This one https://67-72chevytrucks.com/vboard/...d.php?t=665004 has an underhood pic on page 1 and another on page 6.
__________________
- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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#10 | |
Senior Member
![]() Join Date: Dec 2009
Location: TN.
Posts: 8,082
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Re: Heat stove and heat riser question
Quote:
Glad you found it. ![]() ![]() ![]()
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________________________________________________________________________________________ ____________________________________________ 84 Chevy K-20 63 Impala (my high school car) http://67-72chevytrucks.com/vboard/s...Crew Cab Build |
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#11 |
Senior Member
![]() Join Date: Aug 2005
Location: Los Angeles
Posts: 1,328
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Re: Heat stove and heat riser question
That truck has the V-6 in it. No thermostatic air cleaner, V-6's usually had a heat riser valve on the right exhaust manifold. Mine fell off years ago about the same time I put dual exhaust on it.
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1967 GMC CM-2500 Camper Cruiser, 351E V-6, NP 435 4 speed, Dana 60, and factory A/C. 2012 GMC K-3500 WT regular cab, 6.0L Vortec, 6L90. |
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#12 |
Senior Member
![]() Join Date: Feb 2009
Location: Northern Nevada
Posts: 7,230
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Re: Heat stove and heat riser question
Interesting thing I found about the thermostatic snorkel door diagram is I tested it with a vacuum gauge with negative results. I read someplace they don't work that way, and I was thinking, well, why not?
Well, they don't work that way ![]()
__________________
Tony 71 Custom Deluxe, SWB, 2WD, 402, A/C. I developed an assembly kit for restoring the (a) truck from the ground up. My build thread, and more on the assembly kit https://67-72chevytrucks.com/vboard/...d.php?t=730025 |
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#13 |
Senior Member
![]() Join Date: Jun 2022
Location: San Ramon,CA
Posts: 501
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Re: Heat stove and heat riser question
My 70 still has the stove(on the manifold), the riser and the "Thermostatically Controlled Air Cleaner"
This is the LS9 CA emissions version, so maybe the 49-state versions didn't have all that Page 376 of the Service Manual has diagrams ICAC
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1970 C10 Custom longbed 350/350 |
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