Cat Diesel engine temp
Hello all. I have a 36’ diesel pusher with a 275hp cat engine. Also I’m pulling a small car on a tow dolly. It’s mid July and I’m moving through Texas headed to indiana. This is my first run in 90+ a...
Forum Discussion
You have a Freightliner chassis, and depending upon the build date of the chassis, you may have the old one piece dash gauges or could have the system III with separate round gauges. If you have the separate round gauges, then you can estimate the temp fairly accurately.
Freightliner Service Bulletin 54-12 outlines this with a picture of the temp gauge with related calibrated temps. You can find SB 54-12 here:
Freightliner SB 54-12
The temp gauge is pictured on page 5. The remainder of SB 54-12 is excellent information about how the instruments and the vehicle data computer work.
On the 2000 model chassis, the engine will lose power to protect itself at 220 degrees. I'm not sure about your chassis.
We had the 2000 year Freightliner chassis with the cat 330. The front of the CAC must be cleaned frequently to keep the temps in range. The slobber tube also must be extended behind the radiator to reduce fouling.
Keeping the rpm's up on the hills will help. The shift points on the allison transmission do not keep the water pump spinning fast enough to keep the temps down on a hard pull.
If you change the thermostats (regulators - 2) be aware that the early engines came with 180 degree thermostats but my cat dealer sold me 190 degree regulators when I changed the coolant & thermostats.
Fred
Freightliner Service Bulletin 54-12 outlines this with a picture of the temp gauge with related calibrated temps. You can find SB 54-12 here:
Freightliner SB 54-12
The temp gauge is pictured on page 5. The remainder of SB 54-12 is excellent information about how the instruments and the vehicle data computer work.
On the 2000 model chassis, the engine will lose power to protect itself at 220 degrees. I'm not sure about your chassis.
We had the 2000 year Freightliner chassis with the cat 330. The front of the CAC must be cleaned frequently to keep the temps in range. The slobber tube also must be extended behind the radiator to reduce fouling.
Keeping the rpm's up on the hills will help. The shift points on the allison transmission do not keep the water pump spinning fast enough to keep the temps down on a hard pull.
If you change the thermostats (regulators - 2) be aware that the early engines came with 180 degree thermostats but my cat dealer sold me 190 degree regulators when I changed the coolant & thermostats.
Fred
