What causes an ISL 400 engine to overheat?
What causes an ISL 400 engine to overheat?
I too have had what looks like overheating problems with a Cummins ISL 400 in a 2006 Newmar Dutch Star on a Spartan chassis. Temperatures on the Jellico Pass of I75 would run from 195 up to 235 on the dash gage.Then we blew a hose from the engine at the HydroHot system. This hose was by Newmar.
Why is my Cummins 400 engine overheating?
If no overheating, suspect thermosensor. Another possible cause could be an inaccurate gauge. In our coach, the analog gauges feed from a sensor installed by the motor home manufacturer. I have had problems with a number of these gauges. When I view the data directly from the engine sensors installed by Cummins, everything is fine.
What should the RPM be on a Cummins 400?
Keeping the RPM up on steep grades doesn’t help much. TEMP RUNS FROM 195 TO 236 KEEPING RPM UP ON STEEP GRADES DOESN’T HELP MUCH. Welcome to the FMCA Forum.
How big is the side radiator on a 400 ISL?
Our 400 ISL runs between 173 and 183 except on the hottest days and steepest long grades. I’ve never seen it above 200 either on the analog or digital gauge. We have the side radiator which I measure to be about 1100 square inches. Our charge air cooler and transmission cooler are all nested.
What’s the engine temperature on a 2006 Cummins 400?
I have a 2006 Cummins 400 ISL on a Spartan Chassis. The engine warning/alarm to shut down the engine comes on at 230 degrees for me which has happen several times.
Where is the fuel hose on a Cummins 400?
Cummins changed the design in 2006 to where the hose coming right off the block is right next to the Turbo. They welded a piece of pipe coming off the engine block to re-route the hose and I have now had no more problems. Additionally, FYI, another Cummins campaign item is the fuel hose to the fuel rail on the pressure side.
I too have had what looks like overheating problems with a Cummins ISL 400 in a 2006 Newmar Dutch Star on a Spartan chassis. Temperatures on the Jellico Pass of I75 would run from 195 up to 235 on the dash gage.Then we blew a hose from the engine at the HydroHot system. This hose was by Newmar.
I have a 2006 Cummins 400 ISL on a Spartan Chassis. The engine warning/alarm to shut down the engine comes on at 230 degrees for me which has happen several times.
Cummins changed the design in 2006 to where the hose coming right off the block is right next to the Turbo. They welded a piece of pipe coming off the engine block to re-route the hose and I have now had no more problems. Additionally, FYI, another Cummins campaign item is the fuel hose to the fuel rail on the pressure side.
If no overheating, suspect thermosensor. Another possible cause could be an inaccurate gauge. In our coach, the analog gauges feed from a sensor installed by the motor home manufacturer. I have had problems with a number of these gauges. When I view the data directly from the engine sensors installed by Cummins, everything is fine.
When to replace oil cooler in Cummins ISX?
Replace the oil cooler element if a steady stream of bubbles is observed from the element. Slow forming bubbles (less than one rising to the surface of the water every 30 seconds) do notconstitute a leaking oil cooler element. Oil in the coolant is NOT a common issue with these engine ( it happens).
Our 400 ISL runs between 173 and 183 except on the hottest days and steepest long grades. I’ve never seen it above 200 either on the analog or digital gauge. We have the side radiator which I measure to be about 1100 square inches. Our charge air cooler and transmission cooler are all nested.
Replace the oil cooler element if a steady stream of bubbles is observed from the element. Slow forming bubbles (less than one rising to the surface of the water every 30 seconds) do notconstitute a leaking oil cooler element. Oil in the coolant is NOT a common issue with these engine ( it happens).
