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Kevin,
You want a low speed because the engine is running too hot? Or just because? Anytime
That fan is activated you lose fuel mileage.
If you just want it to spin, look on the side of the control block for an adjustment screw and locknut.
Richard and Rhonda Entrekin
95 Newell, 390 Ex caretaker
99 Newell, 512 Ex caretaker
07 Prevost Marathon, 1025
Maverick Hybrid Toad
Inverness, FL (when we're home
)
Posts: 31
Threads: 8
Joined: Jan 2019
(10-06-2025, 06:32 AM)Richard Wrote: Kevin,
You want a low speed because the engine is running too hot? Or just because? Anytime
That fan is activated you lose fuel mileage.
If you just want it to spin, look on the side of the control block for an adjustment screw and locknut.
Hi Richard, temps are good and regulating properly. Just seems to me a nice little breeze over the CAC, turbo, alternator, hyd pump, engine block and the rest of the componets would be a good moderating factor for some longevety. A nice cooling balance for the entire rear engine compartment that has less thermal stress is a good engineering design IMO. It would be interesting to evaluate the temps back there to see what hot spots could be mitigated. A simple air scoop could provide some assitance without robbing fuel consumption. I'll look for that adjustment TX.
Kevin
Former Owner 2001 Fleetwood Discovery
Proud Newell Owner 2004 S/N 698
FAA Licensed Airframe & Powerplant Technician, Inspection Authorized.
44 years of Aviation filled Joy!
Posts: 5,908
Threads: 266
Joined: Jul 2012
The engine thermostat should take care of the block.
Keep in mind the rear of the coach is a low pressure area which naturally pulls in air from the side openings and exhausts to the rear.
No argument that less thermal stress is not better.
What I noticed when the solenoid on the fan controller failed is two things. One, it cut the fuel mileage about 1 mpg. Two, the engine was not operating at its design temp. The Detroit tstats (2 of them are full open at 196), with the fan on high all the time the engine operated in the mid 180’s.
Richard and Rhonda Entrekin
95 Newell, 390 Ex caretaker
99 Newell, 512 Ex caretaker
07 Prevost Marathon, 1025
Maverick Hybrid Toad
Inverness, FL (when we're home
)
Posts: 31
Threads: 8
Joined: Jan 2019
(10-06-2025, 03:39 PM)Richard Wrote: The engine thermostat should take care of the block.
Keep in mind the rear of the coach is a low pressure area which naturally pulls in air from the side openings and exhausts to the rear.
No argument that less thermal stress is not better.
What I noticed when the solenoid on the fan controller failed is two things. One, it cut the fuel mileage about 1 mpg. Two, the engine was not operating at its design temp. The Detroit tstats (2 of them are full open at 196), with the fan on high all the time the engine operated in the mid 180’s.
Good to know the low pressure venturi effect of the air movement when driving is present. Unfortunately that dissapears at low and stopped speeds. That is where a little breeze would be benificial IMO.
I'll make a small adjustment to that fan speed adjustment screw you indicated and see if that could suffice for that no flow condition. With some models having low and high speed fans it makes me wonder what and why Newell made changes to the system. Was it a improvement or required by the type of engine used or both? Would be interesting to see what other ownerst installations have. In the end it may be insignificant but my mind just works this way. The variability in the designs is interesting and wanting the best one for my baby.
My temps are exactly in the range you described them to be.
Former Owner 2001 Fleetwood Discovery
Proud Newell Owner 2004 S/N 698
FAA Licensed Airframe & Powerplant Technician, Inspection Authorized.
44 years of Aviation filled Joy!
