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Re: 2004 Allure Overheating

Reply #25 –
Yahoo Message Number: 90045
Robert Try running at a higher RPM. The fan controller is limited by engine speed and 1500 is too low for long, hard climbs. At 1800 to 2200 the fan runs much faster and the engine has an easier time with it. Torque is one thing HP is another. Torque gets you moving, but using your HP gets you over the hill. Run your engine at peak HP instead of torque and see if that does not make a difference.
Here's a quote from RV Forum...............

"Often times, diesels run hot because the driver doesn't really drive it correctly. Drivers need to gear down and keep the rpm's around 2,000."

Dave

aka Billy Byte (trusty hound)
2000 Allure #30443

Re: 2004 Allure Overheating

Reply #26 –
Yahoo Message Number: 90071
Robert

Not knowing what engine you have but I have had several discussions with various CAT shops and CAT tech line regarding hill climbing because my C-9 is a dog in the mountains.
I was following the wind it up rule and keeping my RPM's around 2000=2200 when climbing and when the engine was put on the computer I was getting excessive exhaust temp codes which I was told was a negative for engine longevity. I have been consistently told to keep the RPM's down to around 1300-1400 (C-9) and I have not had any subsequent fault codes.
I am not a mechanic but on my coach it is my understanding that fan speed is governed by the hydraulic pressure in the system and I have to believe that if I am pulling max torque I am getting max fan speed. There is another issue that I don't understand very well but I bet Lee does and that you can program the fan (C-9) to be on/off or variable.

That's my story and I am sticking to it.

Dan 2006 Allure 31348 C-9

Re: 2004 Allure Overheating

Reply #27 –
Yahoo Message Number: 90079
I had to replace my fan motor/priority valve to fix my overheating problem. I have replaced my fan controller three or four times thus far. With the last heating problem I could not get or force my fan to go more than about 1100 RPM which is not enough to cool the engine even under light loads.
If you force the fan into high speed by whatever means you choose and the fan does not sound like a helicopter then you have a problem. You will know if your fan kicks into high. If it does goes into high it will not be the fan motor/priority valve.
I could not tell if you checked or are going to check with a digital tach but that is what I used to tell the RPM of the fan.
Chances are it is not the hydraulic pump if your steering is OK but any good hydraulic shop can test that component. They put a gauge inline with the hydraulic hose and check the PSI from the pump. If it is not the controller or pump the it will be the fan/priority valve.
I ordered mine through Bernsetein or something like that with a 13 week delivery time from Europe.
Hope this helps. You can search on my name and read where I posted about this a couple of years ago.

Richard Aquino

2001 Intrigue ISL 370 170,000 miles

Re: 2004 Allure Overheating

Reply #28 –
Yahoo Message Number: 90081
I have the C-9 Cat in mine and it programed like that, The fan goes on at 205 and off 195 this was done buy Peterson Cat in San Leandro CA. and works fine.

2006 Inspire # 51668

Re: 2004 Allure Overheating

Reply #29 –
Yahoo Message Number: 90086
Dan

I have a C9 in a 2005 Inspire and have been having overheating issues this year. I installed a manual fan switch which I use when the fan controller system decides not to work properly. I have found that the fan will cool properly most of the time after a restart then eventually it quits working. I called Country Coach tech service to buy a new fan controller and was advised that Inspires with more than 30,000 miles have fan control problems and before buying a new controller I should first go to a Cat dealer to have the fan setting changed from VARIABLE to ON/OFF and another setting set to 12 Volt PWM. If this works then I would not need a new fan controller which costs $931.24 for quick delivery or $150 less for 4 to 6 week delivery. I had also been having problems with my tachometer needle increasing slowly or spiking while driving. I had this problem a few years ago and found a connector in the dash was loose which cured the problem at that time but can find no wiring problem now. The tach reading problem has come back this year along with the overheating problem.
I went to Peterson Cat in Redmond OR and they changed to fan settings and tested the tach with the engine control computer and found nothing wrong. They also changed the engine overheating action from SHUTDOWN to DERATE. These changes cured my overheating problems and caused the engine temp to drop to about 190F most of the time until I was driving on I5 south up the Ashland OR grade and the gages showed severe overheat at 240F on the engine and about 280F on the transmission. I was running at 52 mph up the grade and when I noticed the overheating I slowed down to 35 mph but this did not reduce the indicated temperatures. On the downgrade the engine temp dropped to 190F but the trans temp did not drop much, if any. While going up the grade I did not get an engine overheating light on the dash and suspect that something is wrong with the temp indicators and that I really was not get into overheating. Maybe the indicated overheating on the analog engine and transmission temp gages is associated with the erratic tachometer readings and they are not to be believed. The remainder of the trip home to the Sacramento area showed good temps.
Does anyone have any idea of why the gages could be showing these obviously bad readings intermittently?

Re: 2004 Allure Overheating

Reply #30 –
Yahoo Message Number: 90088
On the contrary. My 2003 Allure barely gets past 185. I once saw 199 going up a mountain in hot weather (98). In cool weather (50) engine temps hang around 178-180. Personally I think it runs too cool, but don't want to buy an unreliable fan controller.

Larry 30856

Re: 2004 Allure Overheating

Reply #32 –
Yahoo Message Number: 90096
I owned 2004 Allure 31038 from new for over 8 years and almost 120,000 miles. It never once over heated. I did nothing to make it so.

George in Birmingham(currently in Santa Fe) '03 Magna 6298
George in Birmingham
2003 Magna 6298

Re: 2004 Allure Overheating

Reply #33 –
Yahoo Message Number: 90105
Bob

My overheating/controller issue started out intermittent and then Chris Snyder put me on the shut down and restart and that worked for a while. I am with you on this guage reading issue. I believe that you would have shut down if the engine was really at 240 degrees. My C-9 would begin to de-rate at about 220 degrees on the Silverleaf. I ordered my Controller from Fluid Power Solutions and paid about $385 and total about $800 with installation a couple of years back. I like the variable setting but I do know that has been the solution for some.

Re: 2004 Allure Overheating

Reply #34 –
Yahoo Message Number: 90108
This message is for Robert.
If you need a tach replacement, you might want to contact Kevin Waite. He has a new tack ordered for me and he said he had to order 3 just to get them made. They don't make the white faced chrome anymore but are making 3 for Kevin.


Jock Vargo

2005 Inspire
51428

Re: 2004 Allure Overheating

Reply #35 –
Yahoo Message Number: 93788
Success!! Thank you all for your responses. Special thanks to John Beach for pointing me to the fan motor. Had the motor replaced last month at Fountain RV and saw an immediate improvement. Haven't checked it out in hot weather yet, for obvious reasons, but the fan noise is very loud when the fan controller fuze is pulled. Also, now when driving I-75 at 65 mph, the coolant temp will rise to 200-202 uphill then rapidly cut back to 189-190 when the fan kicks in.

Bob & Karen 2004 Allure 30985
 

Re: 2004 Allure Overheating

Reply #36 –
Yahoo Message Number: 93789
Bob:

Glad to hear you solved the problem.

John Beachj
06 Allure 31309