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07-10-2007, 01:45 PM
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#1
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Senior Member
Join Date: Jan 2005
Location: LAKE POWELL
Posts: 268
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Does the Cummins ISL 400 on our Coaches have a coolant filter? How much coolant do I need? I'm changing to Fleetguard Optimax. (reminds me of my last 2-stroke Mercury that blew it's power head here on Lake Powell. Now run a Honda 4-stroke on the bass boat)
All comments will be most appreciated.
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CHRIS & DEBI CROSS
40' 2004 ALPINE COACH FDTS
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07-10-2007, 01:45 PM
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#2
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Senior Member
Join Date: Jan 2005
Location: LAKE POWELL
Posts: 268
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Does the Cummins ISL 400 on our Coaches have a coolant filter? How much coolant do I need? I'm changing to Fleetguard Optimax. (reminds me of my last 2-stroke Mercury that blew it's power head here on Lake Powell. Now run a Honda 4-stroke on the bass boat)
All comments will be most appreciated.
__________________
CHRIS & DEBI CROSS
40' 2004 ALPINE COACH FDTS
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07-10-2007, 03:13 PM
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#3
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Senior Member
Join Date: May 2004
Location: cayucos, ca
Posts: 409
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Our 03 40fdts has an ISL 400 engine. and it does have a coolant filter. Cant tell you how much coolant to use. However if you buy Fleetguards coolant make sure it is not the "premixed" type, meaning it has already been cut with 50% water. Convenient but costly. There is no reason why any good antifreeze should not work perfedctly well. When you change the coolant filter you will be adding a chemical additive package to the coolant at the same time. BTW the filter is located up high on the side of the block. They are usually hard to unscrew, so have patience.
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Ross Starkenburg
2005 Holiday Rambler Navigator 43PBQ w/detroit 60 series, Lexus LX470 toad
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07-10-2007, 03:52 PM
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#4
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Senior Member
Join Date: May 2004
Location: Auburn, CA, Havasu, AZ & Mulege, BCS
Posts: 3,683
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Stretch- ScumMike here. I was told the ISL in mine has no coolant filter. Where on the block is it (right, left, fore, aft) and what does it look like? SM
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Baja-tested '08 2-slide 36'
Alpine: The Ultimate DIY'er Project
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07-10-2007, 04:01 PM
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#5
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Senior Member
Alpine Owners Club
Join Date: Jun 2004
Location: Indy Lakes, Indianapolis, IN.
Posts: 1,364
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SM
This is for Stretch......it looks like a filter!!!  
Just kidding. Mines on the drivers side up high, mid engine, IIRC just under the exhaust manifold?  But we have a lowly ISC 330.
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Tom, Patty and Abby Kat, Greenwood, Indiana
2000 36' FDS 72232, Towing '05 PT GT Conv
Our Photos
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07-10-2007, 04:27 PM
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#6
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Community Administrator
Newmar Owners Club
Join Date: May 2000
Location: Newark, DE
Posts: 13,894
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<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">I was told the ISL in mine has no coolant filter. </div></BLOCKQUOTE>
If your ISL has the Final Charge Extended Life Coolant, then there is no filter.
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Adios, Dirk - '84 Real Lite Truck Camper, '86 Wilderness Cimarron TT, '07 DSDP, '11 Virtual RV
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07-10-2007, 08:29 PM
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#7
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Senior Member
Join Date: May 2004
Location: cayucos, ca
Posts: 409
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Mike: I think I read where the newer ISLs dont have a coolant filter. Really no need for it any more. A while back Cummins had a severe problem with electrolysis eating thru the wet sleeve cylinder liners. The coolant filter/conditioner has/had a sacrifical annode plus a soft water chemical pack that was designed to slow down the electrolysis. After Cummins solved the problem with a new alloyed liner the filter was not needed. I guess my 03 ISL 400 may have been among the last.
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Ross Starkenburg
2005 Holiday Rambler Navigator 43PBQ w/detroit 60 series, Lexus LX470 toad
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07-11-2007, 07:49 AM
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#8
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Senior Member
Join Date: Jan 2005
Location: LAKE POWELL
Posts: 268
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Thanks guys for your input. I think I've found the answer. The engine takes 11.5 qts of coolant. By using the Optimax coolant, no filter is needed. The gen-set uses 4.2 qts of coolant so 4 gal. is a perfect fit.
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CHRIS & DEBI CROSS
40' 2004 ALPINE COACH FDTS
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07-11-2007, 05:32 PM
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#9
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Senior Member
Join Date: May 2004
Location: cayucos, ca
Posts: 409
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Chris:
You still need to find out if you have a coolant filter on your engine. If you dont change the spin on filter the steel canister will eventually rust out or electrolysis will get it. The spin-on can is the thinest metal in the cooling system. And again, the word "filter" is a misnomer. It is really a chemical treatment for the cooling system.
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Ross Starkenburg
2005 Holiday Rambler Navigator 43PBQ w/detroit 60 series, Lexus LX470 toad
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07-12-2007, 05:53 AM
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#10
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Senior Member
Alpine Owners Club
Join Date: Jun 2003
Location: Ontario, CA USA
Posts: 739
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Hello Chris: 
I think the amount you indicated for coolant of 11.5 gts  is incorrect you probably mean 11.5 Gal.  My ISC 350 takes 10 Gal of 50/50 mix of coolant. So I but in 5 gal of coolant and 5 gal of Distilled water. You will need at least 5.5 gals for the engine and .5 gal for the gen if you mix it with water. Unless you purchase the premix coolant than you will need to purchase about 13 gals for both engine and gen.
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07-13-2007, 07:22 AM
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#11
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Senior Member
Join Date: Feb 2002
Location: Surprise, AZ, USA
Posts: 344
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I just service the cooling system in my gen-set. I never buy the pre-mix because when you flush the cooling system you can never remove all the coolant from the engine. I add 100% coolant to the system in the quantity to achieve a 50/50 mixture then top off with distilled water.
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Danny & Claudia
2000 Alpine Millennium Edition
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07-13-2007, 07:26 AM
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#12
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Senior Member
Join Date: Feb 2002
Location: Surprise, AZ, USA
Posts: 344
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It's time to have my coach engine coolant serviced. I'm looking to have it done this summer in the Eugene OR area, any recommendations?
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Danny & Claudia
2000 Alpine Millennium Edition
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07-13-2007, 01:05 PM
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#13
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Senior Member
Alpine Owners Club
Join Date: May 2004
Location: WA
Posts: 112
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Danny,
Cummins Northwest,
91201 Coburg Industrial Parkway
Coburg, OR 97401
Coach Care (R.V.) Toll-Free 866-236-2167
4 miles north of Eugene on I-5 at exit 199.
They are next door to Marathon Coach plant and across the street from the Monaco plant.
Cummins Northwest
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Gary & Renee
2002 38' Alpine
Washington-the state
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07-18-2007, 09:01 AM
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#14
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Senior Member
Join Date: Jan 2005
Location: LAKE POWELL
Posts: 268
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Dave F:
My Cummins manual says 11.5 qts. of coolant (engine only) page 7-8 Cooling System. Does the other app. 8 gal. go in the radiator and surge tank?
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CHRIS & DEBI CROSS
40' 2004 ALPINE COACH FDTS
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