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kazoocruiser · 09-25-2018, 12:27 PM

The truck is a 1981 C10 Scottsdale longbed with a 250 inline 6 with the integrated head.

The switch I need screws into the oil galley on the passenger side of the motor, about 4-6 inches to the right of the oil pressure switch.

It is a 2-port switch, which allows manifold vacuum to flow to the heater stove actuator, until oil temperature reaches 150 degrees F. It is called a EFE valve or switch.

The part number I pulled from the service manual is 866887. CORRECTION 366887 Thanks ElGracho.

Thanks in advance for the help.

09-25-2018, 12:27 PM	#1
kazoocruiser Registered User Join Date: Aug 2018 Location: Bronx, NY Posts: 215	Need help locating an obsolete part The truck is a 1981 C10 Scottsdale longbed with a 250 inline 6 with the integrated head. The switch I need screws into the oil galley on the passenger side of the motor, about 4-6 inches to the right of the oil pressure switch. It is a 2-port switch, which allows manifold vacuum to flow to the heater stove actuator, until oil temperature reaches 150 degrees F. It is called a EFE valve or switch. The part number I pulled from the service manual is 866887. CORRECTION 366887 Thanks ElGracho. Thanks in advance for the help. Last edited by kazoocruiser; 09-25-2018 at 11:07 PM.