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.

What’s the operating temp on a Cummins ISL?

Cummins says that 212 is ok operating temp for the ISL engine. What you are probably seeing is the fan controller switching to max speed, which cools the radiator quickly. Guys, thanks for your help.

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.

Is the ISL 400 engine an old problem?

Not to bring up an old problem with Cummins ISL 400 engines, but I didn’t know it was an old problem until we recently (June 2017) experienced catastrophic engine failure and started searching the Internet for answers. I thought my experience might help someone else avoid trouble and “bank- breaking” expenses.

When did Cummins recall the ISL 400 engine?

Apparently, based on a 2007 Cummins recall (well over 2000 engines, 07E-033), Cummins identified a defect in their ISL 400 engines placed in service around October 2005.

What are the features of a Cummins ISL?

The ISL has been designed with heavy duty structural strength, and incorporates design features which are normally associated with larger Cummins engines. An enhanced camshaft and roller cam followers, a viscous damper and high capacity lube system enable Cummins to maintain high durability and reliability with a high power…

What are the benefits of the ISL engine?

Weighing in at just over 800kg, the ISL offers significant benefits for payload critical and high bulk volume operations. With unrivalled levels of torque for an engine of this size, the ISL provides the flexible power solution for premium rigids, lightweight tractor units, higher powered buses and coaches and specialist vehicle applications.

How many horsepower does a Reman ISL engine have?

Reman ISL Long Block Parts List: Cummins ISL Spec Engine Data Horsepower 280 – 400 HP Torque Range 700 to 1255 ft-lbs Weight (Dry) 706 KG Cylinders 6 Inline

Is the Cummins ISL engine a remarkable engine?

However, Cummins promptly rectified this by revising a few of the parts and adapting the software. Regardless, the Cummins ISL appears to have earned its title of a remarkable engine as the vast amount of reviews depict it to be one of a kind.

When to use a Cummins ISL long block?

A remanufactured Cummins ISL long block is a great replacement for someone who has experienced catastrophic internal engine failure but still has good reusable external components that can be saved from their old motor. Long blocks are also a good alternative when trying to reduce costs in the hunt for a new engine.

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.

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.

Are there any recalls on Cummins ISL engines?

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts. I came across this on another forum regarding Cummins ISL engine failures. The following memo from the NHTSA states that 818 engines were supplied to Monaco. I just checked my ’06 HR Endeavor ESN and it is within the recall.

When did the ISL cm850 engine come out?

The failures were occurring on ISL CM850 engines built after October 1 7, 2005. Engineering investigated the failures and coordinated problem solving activities. On and April 18,2006. of this defect. It is estimated that approximately 3.8% of the subject population could experience an engine failure.

What’s the fan coming on on a Cummins 400?

NO OBSTRUCTION INFRONT OR BEHIND RADIATOR, ANTI FREEZE DOWN TO -35 NEW AIR FILTER. FAN IS COMING ON AT ABOUT 195. ON FLAT GROUND RUNS FROM 199 TO 204

Where to buy hose clamps for Cummins ISL 400hp engines?

In a pinch, you can buy larger hose clamps from a hardware store or other source and gang them together to get the make shift clamp around boost side of the turbo plumbing failure. Even helped a fellow heavy hauler do that one night when he did not want to bothered by a set of Kansas scales on I-70.

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.

Why does my Allegro bus keep overheating?

I had a 2004 Allegro Bus that had similar issues. The root problem is that Freightliner uses a 1,050 sq in radiator in those years. The cooling package was not vertically stacked but instead was nested so that the charge air cooler and oil cooler all passed hot air over the radiator.

What to do if your engine is overheating?

With the side radiator, here are things that can correct overheating: Hose out/completely clean the inter-cooler (from outside) and radiator (from inside). Replace engine thermostat. It may not be opening all the way. You mention fan coming on at 195. Some of these are LOW-HIGH and some are variable.

How old is a 2007 country coach Tribu?

PLEASE BE SURE TO CALL AHEAD TO CONFIRM THE AVAILABILITY OF THIS RV AND TO SCHEDULE AN APPOINTMENT TO VIEW THIS RV IN PERSON 2007 Country Coach Tribu… This rear bath and half Country Coach Magna is in excellent condition. Has a Donatello Floor Plan Layout, 54,133 miles, and 600 Cummins Engine.

How much is a 2006 country coach intrigue?

2006 Country Coach Intrigue 530 Diesel Pusher Motor Home.Solid built RV with an original list price over $720,000. Barely broken in with 60,280 miles…. Sale pending !

What should normal operating temp be in Cummins ISL 370 Newmar?

Can anyone tell me what the normal operating temp, should be in Cummins ISL 370 Newmar motorhome. Welcome to the FMCA Forum. Best advice is to call Cummins with your engine serial number.

What kind of engine does a Cummins ISL 400 have?

It has a Cummins ISL 400 Diesel engine with an Allison 3000 MH 6 Speed World transmission with electronic shifter. Today while doing a slow, hard right turn in a Walmart parking lot, the steering wheel “jolted” back left then allowed me to complete the right hand turn.

Cummins says that 212 is ok operating temp for the ISL engine. What you are probably seeing is the fan controller switching to max speed, which cools the radiator quickly. Guys, thanks for your help.