Sensors in heads

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Dec 23, 2011 | 10:32 AM

insomniac

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From: The Jersey Shore

Car: 1991 Firebird Convertible

Engine: 5.7 L98

Transmission: 700R4

Axle/Gears: 3.45 9 Bolt Posi

Sensors in heads

I have a 87 L98 motor im building. There is supposed to a sensor in each head I can see. What are those sensors?

Part numbers?

Dec 23, 2011 | 12:59 PM

305sbc

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From: Fairview Heights Illinois

Car: 1986 Irocz

Engine: 305 TPI

Transmission: 700R4

Axle/Gears: 3.25:1

Re: Sensors in heads

Quote:

Originally Posted by insomniac

I have a 87 L98 motor im building. There is supposed to a sensor in each head I can see. What are those sensors?

Part numbers?

One is the sending unit for your temp-gauge on the dash.
The other is usually a temp switch for your electric cooling fan.

AFAIK any GM replacements for 1980's models that will fit in the hole should work fine.

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