Temp gauge

[Dylan88]

My temperature gauge has been going pretty high but engine /rad doesn't seem to be very hot to the touch. Its a 88 silverado 1500 5.7. Was sitting a few years. I was thinking of doing the new thermostat and temp sensor. Is the only temp sensor on the 88 beside the housing?

 

[PlayingWithTBI]

Is the only temp sensor on the 88 beside the housing?

The sender for your gauge is in the head between cylinder #s 1 and 3 exhaust ports.

 

[Dylan88]

Should I do both sensors ? Do you have the part number handy

 

[evilunclegrimace]

Should I do both sensors ? Do you have the part number handy

If you have a single wire SENDER on the cylinder head the AC Delco PN is 1234793

 

[Dylan88]

This one

 

[PlayingWithTBI]

This one

There's a difference, there's a sensor for a temp gauge, and there's a sender for the base model W/T idiot light. Make sure you get the correct one.

 

[Dylan88]

The one on the head is a single wire ?

 

[PlayingWithTBI]

The one on the head is a single wire ?

Yep

 

[Dylan88]

I noticed the wire is rotten and some bare showing maybe that's why. Is it hard to replace or where's it run too? Thanks for the help.

 

[Schurkey]

There's a difference, there's a sensor for a temp gauge, and there's a sender for the base model W/T idiot light. Make sure you get the correct one.

When it's me, I use the word "sensor" for computer-related items, "Sending unit" for gauges, and "Switch" for idiot lights.

In the days before computer controls, "sending unit" (variable resistance for a gauge) and "switch" (on-off, for a dash light) were the typical terms. "Sensor" came into vogue along with the on-board computers in the early-'80s.

I noticed the wire is rotten and some bare showing maybe that's why. Is it hard to replace or where's it run too? Thanks for the help.

If this were me, I'd cut it back to "good" wire/insulation, and just splice new wire from there.

There's a whole thread about wire splicing:

Solder vs crimps

My buddy Joe helped me fix a piror butcher hack job. The old head unit was install with tape and twist ( I disposed of the works and got a new pigtail plug better than scotch locks I guess ) . So Joe installed the harness with the red crimps and tape. Been wonder what is everyone's preferences...

www.gmt400.com

God bless Western Union, Crimps, Solder, and heat-shrink tubing with adhesive inside.