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06-25-2022, 12:24 PM
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#1
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Senior Member
Monaco Owners Club
Join Date: Aug 2007
Location: Gardnerville, Nevada
Posts: 1,336
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Should I replace Thermostats
I'm currently changing the hoses and coolant in my Cat engine (C9 serial #c9s01083) and debating whether I should change the thermostats. I have 72,000 miles on the coach and have not experienced any overheating issues. Did blew a hose which is why I'm replacing and want to go back to Cat ELC which was lost when hose blew.
Also looking to verify location of thermostats. Believe I have two and will send pictures of where I think they are located shortly.
__________________
Ken, Chris and Maverick (Golden Retriever)
2009 Beaver Contessa
1984 LS1 CJ7 & 2017 Yamaha YXZ SS SE
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06-25-2022, 12:26 PM
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#2
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Senior Member
Join Date: Mar 2018
Posts: 338
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Yes you should
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06-25-2022, 12:35 PM
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#3
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Senior Member
Monaco Owners Club
Join Date: Aug 2007
Location: Gardnerville, Nevada
Posts: 1,336
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First photo I can see the thermostat. Can someone verify next photo is where 2nd thermostat is located? If not can you tell me where it is.
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Ken, Chris and Maverick (Golden Retriever)
2009 Beaver Contessa
1984 LS1 CJ7 & 2017 Yamaha YXZ SS SE
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06-25-2022, 12:43 PM
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#4
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Senior Member
Monaco Owners Club
Join Date: Aug 2007
Location: Gardnerville, Nevada
Posts: 1,336
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Quote:
Originally Posted by the sights
Yes you should
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That’s what I’m thinking, this is turning into bigger project than I planned. Spending fair amount of time just finding the right Gates hoses, especially the 90 degree ones. [emoji13]
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Ken, Chris and Maverick (Golden Retriever)
2009 Beaver Contessa
1984 LS1 CJ7 & 2017 Yamaha YXZ SS SE
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06-25-2022, 01:29 PM
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#5
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Senior Member
Join Date: Sep 2004
Location: Olympic Peninsula
Posts: 547
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Hey Ken, when I replaced the coolant hoses on my Cat I was able to get the complete set from my Freightliner parts guy. I just gave him the last six numbers from my VIN and he pulled up the drawings and associated part numbers for my unit, if you have a FL chassis give them a call.
I ran across a video that shows the location of the two regulators/thermostats at minute 3:47. You can get those and the gasket from a Cat parts/service center.
Hope this helps.
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06-25-2022, 02:14 PM
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#6
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Senior Member
Monaco Owners Club
Join Date: Aug 2007
Location: Gardnerville, Nevada
Posts: 1,336
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[QUOTE=JaminSamin;6225946]Hey Ken, when I replaced the coolant hoses on my Cat I was able to get the complete set from my Freightliner parts guy. I just gave him the last six numbers from my VIN and he pulled up the drawings and associated part numbers for my unit, if you have a FL chassis give them a call.
I ran across a video that shows the location of the two regulators/thermostats at minute 3:47. You can get those and the gasket from a Cat parts/service center.
Hope this helps.
Thanks: Chassis for the Beaver is Roadmaster so out of luck there. Watched the video and they make it sound like two thermostats are under the same housing. Will explore that, but the housing doesn't look like 2 would fit there. Plan to call Cat Monday.
__________________
Ken, Chris and Maverick (Golden Retriever)
2009 Beaver Contessa
1984 LS1 CJ7 & 2017 Yamaha YXZ SS SE
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06-25-2022, 05:54 PM
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#7
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Senior Member
Join Date: Dec 2016
Location: So Cal
Posts: 1,374
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__________________
2000 42' BEAVER MARQUIS AMETHYST w/tag 2 SLIDES CAT C12 425 hp SOLD.........
2014 Tiffin Allegro Bus 37AP
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06-25-2022, 06:23 PM
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#8
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Senior Member
Monaco Owners Club
Join Date: Jun 2014
Posts: 14,603
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Since you are doing all this work you might consider changing the water pump.
Check your idler pulley's also, I remember a post on Cat idler pulley's recently, you might do a search.
__________________
Jim J
2002 Monaco Windsor 38 PKD Cummins ISC 350 8.3L
2005 Jeep Grand Cherokee w/5.7 Hemi
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06-27-2022, 01:33 PM
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#9
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Senior Member
Monaco Owners Club
Join Date: Aug 2007
Location: Gardnerville, Nevada
Posts: 1,336
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Cat sure are proud of their parts and not afraid to charge for them. Regulator (thermostat) $68 and grooved pulley for belt $160. Thought about replacing the tension pulley but they wanted $300. Pulleys are ok but thought I'd keep take offs as spares.
Determined I only have one Regulator (thermostat) part number 284-8264.
Jim new water pump would run over $800, so gonna pass on that one.
__________________
Ken, Chris and Maverick (Golden Retriever)
2009 Beaver Contessa
1984 LS1 CJ7 & 2017 Yamaha YXZ SS SE
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07-05-2022, 10:39 PM
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#10
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Senior Member
Join Date: Jan 2005
Posts: 1,447
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X2 on the water pump. But you should be able get a a CAT exchange pump. It will care same warranty but be approx 1/2 of new. Safe Travels
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07-06-2022, 06:21 PM
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#11
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Senior Member
Monaco Owners Club
Join Date: Aug 2007
Location: Gardnerville, Nevada
Posts: 1,336
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Water regulator has now been changed. Still working on replacing some of the coolant hoses, but almost done. [emoji1]
__________________
Ken, Chris and Maverick (Golden Retriever)
2009 Beaver Contessa
1984 LS1 CJ7 & 2017 Yamaha YXZ SS SE
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07-24-2022, 11:35 PM
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#12
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Junior Member
Join Date: Jul 2021
Posts: 27
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Did you install an original 205 degree thermostat or did you drop down to 195 or even 180?
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07-25-2022, 04:43 PM
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#13
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Senior Member
Monaco Owners Club
Join Date: Aug 2007
Location: Gardnerville, Nevada
Posts: 1,336
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Regulator was 89C or 192.2F and new was same setting.
__________________
Ken, Chris and Maverick (Golden Retriever)
2009 Beaver Contessa
1984 LS1 CJ7 & 2017 Yamaha YXZ SS SE
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