Finished cooling system refurb.
Posted: Tue Aug 10, 2021 10:02 am
Also fitted a thermostat was there wasn't one at all!
Got electric temp gauge fitted on hot side of thermostat to check what's going on, as the original temp gauge was on the cold side (which now there is a thermostat, really is the cold side!)
All went together OK, no leaks!
Took a while for trapped air to come out.
Seems to run OK, but I am noticing quite rapid changes in the electric temp gauge. It's a very cheap one, and I didn't calibrate it, but it will jump from about 85-90C up to 100-110C and sit there. The rad temp stays pretty steady at about 70C. This seems to coincide with engine RPM and not time.
The electric temp gauge sender is in the inlet manifold, so maybe this is measuring steam from time to time?
No sign of boiling over.
I also noticed that when reading over 100C, if you turn off the engine, the temp gauge drops almost immediately back to 85-90C. I was wondering if the cheap gauge can't handle varying supply voltage?
I might pop the sender out and test it on the stove to see if it's close to reality. I can run it off a bench PSU and ramp the supply up and down too...