I just bought a used motor to rebuild, and while taking it apart i found a sensor on the right head, that was melted away, and I have no idea what it is or what it's for....If it helps it has blue plastic on the inside????????????



does anyone have a diagram that shows where and what ALL the sensors are so I can get them replaced..

any help would be nice......

 

if it was in the head most likely it is your coolant temp sensor that goes to the gauge

 

if thats the CTS then whats the one on the pass. side of the block by the knock sensor? the harness connector to it broke will i was doing a tune up and my temp. gage stopped working. i got the same motor, 91 l98

 

Wrong....that is the fan temp switch in the right side head.
The CTS is in the front of the manifold....two wires blk-yel.
The guage temp switch is in the left head.

 

I think it is for the the second fan, this is a dual fan setup,....question does anyone have a part number for the second fan sensor?

or are they the same for both sides?

 

the temp sensor for the gauge and the fan should be the same part number-hold on and ill log onto "alldata" and check it out for you

 

p# sw502 from autozone $5.99
i was wrong-its not the same sensor
hope this helps

 

thanks for the help

 

okay that was not the right sensor, here is what the sensor looks like and it is between the 6-8 spark plug cylinders.
the end of the sensor is melted off

some help would be appreciated

 

here are a couple better pic's you can easily can see the difference,
and some more clues maybe.
I just looked at the harness, and it seems that there is a plug by the wires for the started, it's white and with 1 female connector, and has a blue wire.
Any idea what that plug would go to?



some help please

 

alright I just matched it to the harness and it's all good


thanks guys