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Old 12-11-2016, 02:01 PM   #1
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Source Engineering Wax Valve

Hello, We have an 06 Tiffin Allegro Bus 42 QDP with the Cummins 400 ISL with the side radiator. The Sauer Danfoss fan motor runs at full speed all the time and suspect fan control module and was wondering if anyone had ever changed theirs to the source engineering wax valve? If so were you happy with the change and approximate cost to do so? Thanks for any response.
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Old 12-11-2016, 04:39 PM   #2
"Formerly Diplomat Don"
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I can't answer your question, but I do buy and use Source Engineering components. I spoke with Jim (usually answers the phone) at an Oregon rally regarding their wax valve. My coach is electronically controlled and I know many have had problems with it running all the time.

What I like about the Source product, but what I thought Jim explained, is that it's variable speed. On runs as hard as needed.
Don & Mary
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Old 12-11-2016, 05:16 PM   #3
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I did it about two months ago on my CC. I noticed that the usual noise in the rear bedroom was much more quiet. I noticed some increased mileage.

The cost was 700.00 and I did the work myself. The guys at source at great to deal with. After I installed the kit I left on a trip for California and went by their shop. They checked my installation and even adjusted my ride eight valve for free.
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Old 12-11-2016, 06:02 PM   #4
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I just had the wax valve and comfort ride valves installed last week at Source Engineering. The max I see coming home on I-5 was 194degs down to 170degs with the trans temp at a steady 170deg all from my Silverleaf.
I have new Koni shocks but the comfort ride valves also made a difference, both well worth it.
If you have the wax valve installed, get an extra gallon or 2 of what ever coolant you use. I had 2 gallons of Cat ELC coolant and they use one.
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2006 Country Coach Inspire 360 40ft Genoa Designer Series, Samsung 197 RR
Cat C9--STEEL & COPPER Bolt Together Radiator w/ updated rubber mounting
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Old 12-11-2016, 09:14 PM   #5
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I had the wax valve installed before I took off for the FMCA convention in West Springfield. The ambient temps on the road were in the mid to high 90's for the whole trip across and my motor temps never went over 197. Trans temps were in the high 180's.

Where I would see 195-7 I now see 188 or so with trans temps in the 170 range.

Before you change over, make sure that your controller does have 12VDC applied to it. If it doesn't have 12 VDC, the controller will default to high. Also clean all the associated connectors. Another thing that wil keep the controller on high it your environmental controls. If you have selected air conditioning or vent, the controller will go high
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Old 12-12-2016, 06:27 AM   #6
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I installed the Source Engineering Wax Valve after my 2nd sauer-danfoss failed. I'm very happy with the results......Bruce
Bruce and Sandy 2018 Coachmen Leprechaun 26DS Chevy
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Old 12-12-2016, 07:34 AM   #7
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source engineering wax valve

thanks to all for the input.
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