Chevy G20 Van - 305 engine - no temp reading

Have you verified coolant temperature by others means? Just because the gauge isn't registering doesn't mean the engine isn't heating up. Could be a short in the wire, could be the gauge is just dead.

What year is this van?

Doc

Thanks for the reply Doc.

Van is a '95. I verified the temp with a thermometer in the radiator - unpressurized 'cause cap was off, but it correlated with the thermostat. I believe it's a wire problem - I'm an electrician and electronic tech - and would love to get my hands on a schematic to trace it. I would also like to get a chart of resistance vs. temperature......

Id just add an aftermarket mechanical gauge, would be an easy fix.

I have the scematics out in my garage and can scan them in tomorrow evening sometime. Too cold and too late to go out and grab em' right now. E-mail me gmc(underscore)man(at)adelphia(dot)net and I'll get em' out to you.

You didn't use nefarious amounts of teflon tape or pipe dope when you installed the new temp sender did you?

You replaced the sender in the driver's side head and NOT the one located next to the t-stat housing right?

Doc

Thanks Doc - sent mail.....