71 BB Temp Switch

[Kenneth T.]

My LS5 has a bayonet type temp sender in the driver's side cyl head. There is a plug in the pass side head. I have seen older BB's with a temp sender on the pass head.

The reason I ask is that I have a wire coiled up by the heater box that has a black slip on female end that could be used on that type of temp sender. It that used for the CEC control or is it just....there ?

[Warren F.]

Re: 71 BB Temp Switch

Ken,

The passenger side TCS (temperature control switch) is a double spade connection that the green wire is hooked to. Your car should have it as factory installed.

[Joe L.]

Re: 71 BB Temp Switch

My LS5 has a bayonet type temp sender in the driver's side cyl head. There is a plug in the pass side head. I have seen older BB's with a temp sender on the pass head.

The reason I ask is that I have a wire coiled up by the heater box that has a black slip on female end that could be used on that type of temp sender. It that used for the CEC control or is it just....there ?

Kenneth-----


The temp sender on the forward driver side cylinder head is for the temperature gauge. It was originally a pin terminal. Most, if not all, replacements for the last 30 years, or so, have a button head. Any other terminal configuration indicates a functionally incorrect temp sender.

A temperature SWITCH was mounted on the rear passenger side cylinder head. This switch used blade connectors mounted at a 90 degree angle. This switch was part of the TCS component of the CEC emissions control system. Many folks disabled this and that may be why yours is missing.

[Kenneth T.]

Re: 71 BB Temp Switch

Warren, Joe:

Thank you, correct as always! I actually routed through "my box" of old parts and found the old sender. I did a valve job on it years ago and must have removed it. It's a process, but I am getting closer...

Regards,

Ken