Heater By-Pass Options

1950 - 1968, M38, M38A1, M170, modifications, sugestions, and ideas, official MWO's and unofficial field mods.
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captaincarrier
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Heater By-Pass Options

Post by captaincarrier » Sat Mar 28, 2020 11:08 am

Drove around St Pete Yesterday and the heat passing through the heater core is very uncomfortable this time of the year.
Was thinking of:
a) just eliminate the heater hoses and tough it out those few winter days we have
b) place a manual on-off valve in the line from the water pump
c) install a by-pass valve

Any input from those with experience of such?

Joe Gopan
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Re: Heater By-Pass Options

Post by Joe Gopan » Sat Mar 28, 2020 11:36 am

The M-38A1 Hot Water Heater Kit has two 90 Degree Shutoffs for 5/8" hose. one on the head to the rear of the carburetor, and one at the waterpump. They stop the circulation.
2011 MVPA PIONEER AWARD - MVPA #1064
HONOR GRAD-WHEELED VEHICLE MECHANIC SCHOOL 1960 - US ARMY ORDNANCE SCHOOL(MACHINIST) ABERDEEN PG 1962 - O-1 BIRD DOG CREWCHIEF - 300,000+TROUBLE FREE M-38A1 MILES
LIFE MEMBER AM LEGION-40/8-DAV
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captaincarrier
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Re: Heater By-Pass Options

Post by captaincarrier » Mon Apr 06, 2020 1:31 pm

Thanks Joe.....

signsup
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Re: Heater By-Pass Options

Post by signsup » Fri Jun 26, 2020 7:08 am

And I thought I read that one of the jeeps had the ability to open and close these valve by cables connected inside the cab.
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Joe Gopan
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Re: Heater By-Pass Options

Post by Joe Gopan » Fri Jun 26, 2020 8:38 am

Not on any of the GI Hot Water Heaters the military issued for the 50's-60's M-Series Trucks.
2011 MVPA PIONEER AWARD - MVPA #1064
HONOR GRAD-WHEELED VEHICLE MECHANIC SCHOOL 1960 - US ARMY ORDNANCE SCHOOL(MACHINIST) ABERDEEN PG 1962 - O-1 BIRD DOG CREWCHIEF - 300,000+TROUBLE FREE M-38A1 MILES
LIFE MEMBER AM LEGION-40/8-DAV
7 MIL SPEC MAINTAINED MV'S
COL. BRUNO BROOKS (ARMY MOTORS) IS MY HERO

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