2turbotoys
Salaminizer
- Joined
- Nov 13, 2007
- Location
- Reading pa
I have been trying to pin down what is going on with the cooling system in my 79 242 for a while. Replaced almost everything. The temp gauge goes almost all the way to the red when in slow traffic, so I thought the e fan wasn't working. It does, but only for about 3 seconds at a time. 30 seconds later it will do it again. It is an 850 fan, mounted in a 240 shroud, factory fan relay setup.
This happened before, so I installed an Autometer gauge in the glove box and it never went much over 210 degrees. I wanted my regular gauge back so pulled the Autometer out and hooked up the stock gauge. That would only work intermittently, so I just replaced it with another unit. This one goes very high as I mentioned, then back down to the N when at 50 mph or so for a few minutes. Do these not have the compensator thing which keeps the needle steady on the N?
What I did so far (for various reasons but this is the state of the cooling system):
New water pump
New thermostat
New radiator
New thermoswitch
New temp gauge sending unit (can you test these?)
Solid state voltage regulator for cluster
Replaced temp gauge with another one to see if that was the problem
Maybe there is no problem as the Autometer gauge read ok temps, but why does the fan not stay running for more than 3 seconds? This is sitting in the driveway watching the gauge and fan.
This happened before, so I installed an Autometer gauge in the glove box and it never went much over 210 degrees. I wanted my regular gauge back so pulled the Autometer out and hooked up the stock gauge. That would only work intermittently, so I just replaced it with another unit. This one goes very high as I mentioned, then back down to the N when at 50 mph or so for a few minutes. Do these not have the compensator thing which keeps the needle steady on the N?
What I did so far (for various reasons but this is the state of the cooling system):
New water pump
New thermostat
New radiator
New thermoswitch
New temp gauge sending unit (can you test these?)
Solid state voltage regulator for cluster
Replaced temp gauge with another one to see if that was the problem
Maybe there is no problem as the Autometer gauge read ok temps, but why does the fan not stay running for more than 3 seconds? This is sitting in the driveway watching the gauge and fan.