Manual Heater Control Valve
Fits : 41-71 Jeep & Willys

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Manual Heater Control Valve
Fits : 41-71 Jeep & Willys

Manual Heater Control Valve (1 required per vehicle)

Manual heat shut off for the top of the head to stop coolant flow to the heater assembly.  Screws into the back of the cylinder head.

Originally used up to 1956 but can be used for the 1957 and up to get rid of the old cable valve system.

41-45 MB
41-45 GPW
46-49 CJ-2A
49-53 CJ-3A
53-64 CJ-3B
55-71 CJ-5
50-52 M38
52-66 M38A1
46-64 Truck
46-64 Station Wagon
48-51 Jeepster

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Availability: In stock

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Questions: I have a 1967 cj5 with the F-134 engine. Where on the engine cylinder head does this screw into? Is it at the inlet side going to the heater box in the engine and is there already a spot to thread it into?
Question By: sandy on Jan 4 2021 3:44 PM
You should have a threaded port ontop the head at the rear corner.
Answer By: Willys Jeep Parts Tech on Jan 4 2021 10:02 AM
Questions: I have a 1947 CJ-2A with no heater. Noticed that there is a manual heater control valve on the cylinder head. A hose goes from the control valve to lower radiator hose that connects the radiator and water pump. Can I remove and plug the control valve with a bolt and only have the lower radiator hose to the water pump connected?
Question By: Howard Zorian on Dec 26 2020 10:50 PM
Yes, you can close off the bypass if you dont have a heater.
Answer By: Willys Jeep Parts Tech on Dec 28 2020 6:14 AM
Questions: Jeep just started engine die when let off accelerator. Idle it up at carburetor it stays running but idling too high. !957 CJ7 4 cylinder.
Question By: David Duncan on Nov 9 2020 9:26 PM
You need to check your timing and probably have low vacuum. At idle (approx 475 rpm) once warm you should have 20 inches of vacuum draw with no choke.
Answer By: Willys Jeep Parts Tech on Nov 9 2020 1:53 PM
Questions: is the heater control valve outlet 5/8"?
Question By: RICHARD D MCKEOWN on Aug 10 2020 3:32 PM
Yes, 5/8" diameter.
Answer By: Willys Jeep Parts Tech on Aug 11 2020 5:54 AM
Questions: What type of thread sealant would you recommend to install this? Teflon tape?
Question By: Michael A Bukosky on Jul 27 2020 3:38 PM
Teflon should work just fine.
Answer By: Willys Jeep Parts Tech on Jul 27 2020 10:03 AM
Questions: What is the difference between this and the heavy duty valve?
Question By: Smith on Jan 23 2020 11:07 PM
The heavy duty is a bit thicker walls and valve. But both work great.
Answer By: Willys Jeep Parts Tech on Jan 24 2020 6:03 AM
Questions: For a M38A1 w/o a heater, do you sell the "plug, pipe, sq-hd, 1/2-in - 103868"? The one that is shown in the diagram.
Question By: Bill on Nov 19 2017 3:41 PM
Your local Napa should have this.
Answer By: Willys Jeep Parts Tech on Nov 20 2017 5:45 AM
Questions: Does this piece attach at the water pump? I guess i have an aftermarket water pump on a CJ-3A L-314 with 2 valves, one going to the non existent heater unit which needs to be plugged.
Question By: Rich on Aug 23 2017 2:34 PM
This typically goes on the head itself.
Answer By: Willys Jeep Parts Tech on Aug 23 2017 11:42 AM
Questions: I see you have the manual shut off valve for the heater. Do you have the shut off valve that mounts on the firewall and is controlled by an inside cable. This is on a 1957 sw,L6-226 ?
Question By: robert howell on Dec 23 2016 4:33 PM
This part is the manual shut off used on the head. Any others would be used only. This could be used in a number of places however with the right fittings.
Answer By: Willys Jeep Parts Tech on Dec 28 2016 5:26 AM