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05-25-2016, 05:00 PM
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#1
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Senior Member
Join Date: Feb 2013
Location: Illinois For now
Posts: 115
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Coolant shutoff
Getting ready to do the yearly maintenance on my 2002 DSDP. I was told that there is a coolant shutoff that would prevent you from getting a "bath" when you change the coolant filter. I have yet to find it...help! 
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2002 4090 DSDP 350 ISC Cummins
Toad 26 ft enclosed Trailer with car, golfcart and motorcycle plus gear.
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05-25-2016, 05:16 PM
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#2
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Senior Member
Join Date: Nov 2005
Posts: 7,400
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Normally, there is a small blade knob right on the filter mounting above the filter that can be turned 90 degrees to shut-off the coolant for filter replacement.....
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Old Scout
2015 IH45 Foretravel
2003 Alpine 40' MDTS [Sold]
New Braunfels, Texas
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05-25-2016, 05:35 PM
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#3
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Senior Member
Join Date: Jun 2012
Location: AB
Posts: 7,587
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Quote:
Originally Posted by Old Scout
Normally, there is a small blade knob right on the filter mounting above the filter that can be turned 90 degrees to shut-off the coolant for filter replacement.....
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Yes, that's the norm. If in fact you have a coolant filter. Not all engines have it.
The OEM plastic valves are known to break when used. The PO of my coach had the two originals replaced with metal valves with a metal knob.
Something to keep in mind when changing this filter. Besides being a filter, there are different part numbers for filters that contain varying amounts of SCA additive charge depending on what your coolant analysis recommends.
If you are using Extended Life Coolant or OAT coolant the standard filter Without SCA is P/N WF2077 (Fleetgard)
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2019 Unity LTV CB, pushed by a 2013 Honda CRV, BlueOx Baseplate, Aventa Bar & Patriot Brake
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05-28-2016, 03:21 PM
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#4
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Moderator Emeritus
Join Date: Jan 2000
Location: West Palm Beach, FL. USA
Posts: 27,704
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Yeah, mine (ISL engine) is way, way up there where the coolant "filter" can screws in. Pretty much impossible to reach without some special (and long) tool. I long ago decided that somebody else can change that one!
It's not a filter - it is a slow-release chemical pack that puts additional coolant chemicals into the system.
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Gary Brinck
Former owner of 2004 American Tradition and several other RVs
Home is West Palm Beach, FL
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05-28-2016, 09:58 PM
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#5
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Senior Member
Join Date: Nov 2005
Posts: 7,400
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Nope--it kind of is a filter--you can buy "filters" with varying levels of DCS chemical: from 0-level of DCA to like 3 or 6 units of DCA. Be kind of dumb to offer a "chemical dispenser" with "0" chemicals?????
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Old Scout
2015 IH45 Foretravel
2003 Alpine 40' MDTS [Sold]
New Braunfels, Texas
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05-31-2016, 01:24 PM
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#6
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Moderator Emeritus
Monaco Owners Club Texas Boomers Club
Join Date: Nov 2015
Location: Central Texas
Posts: 13,426
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On the ISC, there are two levers on that cut off switch. One can be accessed with the oil filter on the engine, the other is between the oil and coolant filter. The one between the filters is more robust and harder to break. I now change the coolant and oil filter at the same time so I can use that lever.
My engine has OAT coolant in the system and I use the coolant filter doesn't contain SCAs.
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Dennis and Katherine
2000 Monaco Dynasty
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06-05-2016, 01:43 PM
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#7
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Moderator Emeritus
Join Date: Jan 2000
Location: West Palm Beach, FL. USA
Posts: 27,704
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Quote:
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Be kind of dumb to offer a "chemical dispenser" with "0" chemicals?????
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It's for use when you add your own SCA/DCA chemicals.
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Gary Brinck
Former owner of 2004 American Tradition and several other RVs
Home is West Palm Beach, FL
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06-05-2016, 01:49 PM
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#8
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Senior Member
Country Coach Owners Club Solo Rvers Club iRV2 No Limits Club
Join Date: May 2011
Location: Vancouver, WA
Posts: 37,725
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Quote:
Originally Posted by Gary RVRoamer
Yeah, mine (ISL engine) is way, way up there where the coolant "filter" can screws in. Pretty much impossible to reach without some special (and long) tool. I long ago decided that somebody else can change that one!
It's not a filter - it is a slow-release chemical pack that puts additional coolant chemicals into the system.
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On our '02 DSDP ISC 350 it was, in fact, a filter. You can buy them with varying amounts of DCA or totally without depending on the need for SCA's in your coolant.
On the ISL they did eliminate the filter for some reason.
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2009 45' Magna 630 w/Cummins ISX 650 HP/1950 Lbs Ft, HWH Active Air
Charter Good Sam Lifetime Member, FMCA,
RV'ing since 1957, NRA Benefactor Life, towing '21 Jeep JLU Rubicon Ecodiesel
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06-05-2016, 08:21 PM
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#9
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Senior Member
Join Date: Aug 2001
Location: North America somewhere
Posts: 30,971
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Humm, when I changed my coolant filter I never knew about any shutoff valve, just changed the filter without spilling over a few oz.
That might be because I have a side-radiator, everything is below the level of the filter.
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2000 Winnebago Ultimate Freedom USQ40JD , ISC 8.3 Cummins 350, Spartan MM Chassis. USA IN 1SG 11B5MX,Infantry retired;Good Sam Life member,FMCA. " My fellow Americans, ask not what your country can do for you, ask what you can do for your country. John F. Kennedy
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06-05-2016, 08:49 PM
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#10
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Senior Member
Newmar Owners Club
Join Date: Jun 2012
Location: Spicewood Texas (West of Austin)
Posts: 4,514
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My ISM has a gate valve on both sides of the filter. I use one of them to fill up a bottle to test the coolant, while changing the filter. There is little to no mess involved. You can see one of them in this photo that I took of my ME-BMK installation. The other is a duplicate on the other side.
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Scotty and Kristen, Airedales Dagny and Wyatt
2007 Newmar Mountain Aire 4528, 450 HP ISM, Allison 4000, 8 Lifeline AGM's
2019 F250 King Ranch 4x4 Powerstroke - SOLD
2022 F350 DRW King Ranch 4 x 4
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