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timtechcorvairwiki:06a_engine:special_oil_pressure

Special Oil Pressure Switches

By Mike Sweaney with some help from Tim Palmer

Tim and I were talking about all the trials I had in finding a multi purpose oil pressure switch. The following is EVERYTHING I know about this subject. Here goes.

NOTE: The following part numbers are NAPA numbers unless otherwise noted.

Graphic OP 6618 First choice:
OP 6618 #2 opens at 2-6 lbs. pressure. (Connects to oil pressure light.)
#1,3 closes at 1-9 lbs. pressure. (Connects to fuel pump.)
Graphic OP 6653 Second choice:
OP 6653 REQUIRES SPECIAL PLUG. #2 opens at 2-6 lbs. pressure. (Connects to oil pressure light.)
#1,3 closes at 2-6 lbs. pressure. (Connects to fuel pump.) GM #25036940 Switch $8.50
GM #12085499 Connector $28.00 + According to the GM parts guy the sending unit and connector can be found on the following cars in the salvage yard.
90-92 W body 3.1 engine
88-89 A body 2.8
87-91 J body 2.8/3.1
88-89 L body 2.8
Graphic OP 6626 Third choice:
OP 6626 #2 opens at 2-8 lbs. pressure. (Connects to oil pressure light.)
#1,3 closes at 11 lbs. pressure. (Connects to fuel pump.)

For those of you have not figured out what these switches are for, I will enlighten. The extra set of contacts is used as a safety circuit for Corvairs with electric fuel pumps. The switch won't allow the pump to run unless the engine is running.

timtechcorvairwiki/06a_engine/special_oil_pressure.txt · Last modified: 2015/01/13 17:06 (external edit)