Adamant1971

So I have searched and I think I'm ok, but still paranoid. The 87 S4 temp gauge runs right in the middle and up to the last white line in traffic.

My S3 never goes past the first white line.

Now I know these are just wonder gauges so I picked up an IR gun.

On the 87 I'm getting almost 200f going to thread, and anywhere from 170-180 returning to the motor at the thermostat.

Now also should I be taking temps on the hose or on the fitting at the motor?

I have not had a chance to run the IR gun on S3 to see what it's temps are.

Just want to make sure I'm not running to hot.

ammonman

Sounds about right. Your T-stat should start opening between +81C and +85C (+178F to +185F) and be fully open by +98C (+208.4F). On my '90 the return temp from the radiator modulates between +168F and +180F as the fan cycles on and off. Temps leaving the engine hover around +196F with +94 ambient.

Mike

Adamant1971

Thanks Mike. That's what I thought, just nervous with a new to me 928. Adam

fraggle

My gauges is frequently up at the top line but I'm getting 175-185 right next to the temp sensor that feeds the gauge and light. I've noticed my gauge is very sensitive to voltage, too.

MFranke

I've never hooked up a gage, but the needle on the 87 and 88 would usually ride in the lower half of mid band, and then maybe go into upper part sometimes. After adding x-pipes however all temps are lower, near bottom of mid band usually.