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Old 05-06-2019, 07:57 AM   #1
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Engine Coolant Filter

Noticed while changing the oil on my coach yesterday, noticed another filter up in there and after looking at the number and seeing what it was for it's a coolant filter. Most likely have to access from inside the engine box. Wondering what the change intervals are for that one, and when I take it off, is coolant going everywhere or does it drain back when not running. Nice to know how many buckets I need under it before I make a mess.

Did add the Fumoto oil drains to both the engine and generator and should make that part easier the next round I hope.

Thanks for any inputs
Bruce
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Old 05-06-2019, 08:29 AM   #2
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...not all model years of Alpine have a coolant filter....I don't have good access from above on my 2003 40ft so getting at it from the bottom is the only option for me...not sure how important the filtration function is as Cummins did away with it on later engine models...so how often to change it is open to debate....secondary function is to add DCA to coolant...these filters come with different levels of DCA--eg, 0,1,2, or 3 units... most owners manage DCA level with additives vs the filters...Cummins engine has a shut-off valve in filter mounting base so no/little coolant is lost....
PS--I can see the utility of adding the oil dump valves to the Cummins and Onan pans but lack of clearance between oil pan and potential ground obstacles would make me very nervous....just saying.
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Old 05-06-2019, 09:09 AM   #3
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Yes, the correct coolant filter is one of the few "no simple answer" filters on the coach.


IF, repeat IF you have the "old style low silicate for diesel with added SCA" coolant, you must test the coolant (test strips at any place that works on OTR diesels) for SCA concentration. Most test strips also test for pH and freeze point. Just dip it in and read the colors. Only then can you determine the correct filter, as you may need no SCA or quite a lot. Same filtration, different amounts of SCA.


If you have one of the new generation "maintenance free" diesel coolants (most OAT-based) you ONLY USE A FILTER WITH NO SCA.
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Old 05-06-2019, 01:56 PM   #4
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Guess nothing is ever easy to figure out. Have to do some reading up on it I guess. Know the current filter on it is a Fleetguard WF2071 and it looks like been there a bit. We've had this coach 2 years. I always take a magic marker and date filters and mileage. Write in a book also but never know when I'll misplace it.

The add on drain on the oil pan is at an angle so it's almost flush with the bottom of the oil pan. Thought about it sticking down too but figure if I knock it off I've tore up some other things with it.

Thanks for the input
Bruce
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Old 05-06-2019, 02:11 PM   #5
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The Fleetguard WF2071 shows to be a coolant filter with 4 units of SCA.


So, it MAY be correct if you have the old, green coolant. But, it needs to be tested first.


If one of the new generation (likely red or pink) OAT-based coolants, it is NOT the correct coolant filter.
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Old 05-06-2019, 05:56 PM   #6
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There is a shut off valve right by the coolant filter. Sometimes one can forget and make a mess, even tho they know it .
The blank filter is WF2077 if converting to OAT, which I did years ago.
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Old 05-07-2019, 07:52 AM   #7
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coolant filter

I have a 1998 with the cummons 325hp. I just changed mine. It was easy. it sits up top on the left side. access through the rear of engine. Some spilling but not much.
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