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Coolant Boost Pumps

Yahoo Message Number: 96692
I cut and pasted a response from Larry (Thanks again Larry), but thought I'd ask for more info sharing too.

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I'd say that is the coolant boost pump for the dash heater. I had to change mine a couple years ago. My lift pump is on passenger side above starter. You should watch the coolant leak because it can turn into a show-stopper if it turns into a major leak. Some have by-pass the pump and reported good dash heat W/O the boost pump.


Larry 03 Allure 30856

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I will be able to confirm if this is the coolant boost pump in the next day or two, when I can find dry paved parking lot to get under the coach with a flashlight and confirm that this has coolant hoses in the loop. (Several days of heavy rains, and in Provincial Parks of British Columbia as we run down the Cassiar Highway. Will hit Smithers, BC soon, with services if needed.)

If this does turn out to be a the coolant boost pump feeding the dash heater, a few questions.

1) Does using the dash heater make a difference, in how this leak may expand?

2) If not using the front dash heater. How many have had the leak progress strong enough to lose enough fluids to require the bypass repair?

I did run the heater dash yesterday, and noticed no difference in the leak. And describing this leak again. No drips, no drops, it's just a sign of wetness. More like moisture of some kind of fluid, with Cassiar road dirt coating it. All fluid levels are good.

Just trying to get an idea if this is an 'Alter your travel plans and get to a repair facility now?' - Or - 'Continue to monitor, and add to maintenance repairs when back home?'

I've tried searching via Google, with mix results, and scrolled, scrolled, scrolled down this board looking for info, with no luck on other threads. (Yeah, even the old search would have helped some:)!).

TIA,
Smitty

04 Allure 31017
04 Allure Sold to a nice new owner! Now enjoying a 07 Magna Rembrandt 45' ISX600 #6775
"We're ONDROAD for THEJRNY!" (Toad and Coach license plates, say Hi if you see us!)

Re: Coolant Boost Pumps

Reply #1 –
Yahoo Message Number: 96704
My rig had two coolant boost pumps.

I had the rear one (just forward of the engine) replaced once.

The next time it failed, I had it bypassed. Later on I removed it.

When it failed, it stranded us on H94 in eastern Montana.

The one up front still runs at 19 years of age.
Back your rig over a ditch somewhere to get room to work on the rear one.

Re: Coolant Boost Pumps

Reply #2 –
Yahoo Message Number: 96721
I had the rear boost pump motor fail some years ago. It is not leaking. I pulled the fuse for the boost pumps. I have plenty of dash heat without them running at all.

Rich 2002 Magna

Re: Coolant Boost Pumps

Reply #3 –
Yahoo Message Number: 96731
I had my rear boost pump fail on my way to Hill City , SD. I contacted coach net and they sent a tech

and he crawled in top of my Cummins 400 and by passed the pump, and disconnected the power. I

called Chris Snyder and he told me the front pump was more than adequate to keep the system

operating and not to worry about replacing the rear pump as it would just fail again. The engine

compartment just get to hot for the plastic parts of the circulation pump.
Thats been 5 years ago, and

all is well. Plenty of heat when needed up front.
TWI 2004 Intrigue 11731

Original email:
-----------------

From: rich_barlow@... [Country-Coach-Owners] Country-Coach-Owners@yahoogroups.com Date: 30 Jul 2014 21:27:34 -0700

To: Country-Coach-Owners@yahoogroups.com Subject: [Country-Coach-Owners] Re: Coolant Boost Pumps

I had the rear boost pump motor fail some years ago. It is not leaking. I pulled the fuse for the boost

pumps. I have plenty of dash heat without them running at all.

Rich 2002 Magna

myhosting.com - Premium Microsoft Windows and Linux web and application hosting - http://link.myhosting.com/myhosting

Re: Coolant Boost Pumps

Reply #4 –
Yahoo Message Number: 96733
Hi Guys, I have seen this thread before and wondered where the fuse for that/those pumps are located. If you can give me a hint I will see if I can pull the fuse since we seldom ever need dash heat. We head south when the weather changes and do not come back for a couple of months.
Glen Burgess

2004 Intrigue Tag
2013 Jeep Wrangler

Re: Coolant Boost Pumps

Reply #6 –
Yahoo Message Number: 96742
I have a 2001 magna.my boost pump in the front locked up & when I had it replaced the fuse was Located in the front compartment on the drivers side. Bob

Re: Coolant Boost Pumps

Reply #7 –
Yahoo Message Number: 96744
Hey All - I've appreciated the responses! And, I liked the info sharing on the fuse location. Will confirm mine is in the front cabinet below the driver. But, another option is to just disconnect the feed, wrap it in electrical tape, to the actual rear Coolant Boost, for coaches with a rear and front. (Some coaches have a dedicated fuse to each pump. I think some do not. If only one is failing, keep the power to the other by disconnecting at the actual problem Coolant Boost.)

OK - So, here is where I think I am. We got into Smithers, BC, and by gosh we had no rain for over 14 hours!!! (Has not rained in Smithers, BC for about 3 days now.) We had a local shop, Traction Heavy Duty Truck Repair & Parts, take a quick look in at the still suspected Coolant Boost, to see if they knew what it was.

Rob, a lead mechanic, stared at it for about 90 seconds, and said 'Hang on.'. Went to his shop, came back with a crawler, slid under the rear and shined his flashlight on it from below.

About 2 mins later, he came back up and said 'Never seen one of them, but I think you're right. Those hoses you pointed out do connect into it, and yeah, an electric feed too. But, no leaks around any of the body. I see residue leaks around the hose ends. I think the clamps may be loose.'

He said give me a minute, went in and helped a few of his other mechanics with problems for about 7-10 mins. Came back with a socket wrench, and back under the coach he dove. Three minutes later, he's back up, and said 'Yeah, the clams were good, but a bit loose. I tightened them down a bit more, and I think your good to go. I also got a bit higher, and can tell you know leaking on the assembled body, or around the gasket. It sure looks like the slight seaping hoses spread it around while at speed.'

He said why not run with this for awhile, and see if it the darkened area of residue on the assembly body, dries out?

I told Rob, that I had had all of the hoses replaced about 10 months ago (radiator, and any hose the tech could lay his hands on, were replaced). Cold, hot, cold, hot, vibration, vibration, etc. - had probably been enough to loosen them up a bit.

So, for now, I feel my Coolant Pump is OK. And will continue on my trip and monitor.

Not a surprise to any of you, but I also had some good email input from Kevin Waite too.

My best to all, and sure hope I don't start this thread back up with 'Well, we were going thru the state of Washington, when we dumped all of our coolant....:)!

Smitty

04 Allure 31017
04 Allure Sold to a nice new owner! Now enjoying a 07 Magna Rembrandt 45' ISX600 #6775
"We're ONDROAD for THEJRNY!" (Toad and Coach license plates, say Hi if you see us!)