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 > Radiator sprayer

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Dan's Downtime

Prescott, AZ

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Posted: 11/08/12 08:59am Link  |  Print  |  Notify Moderator

Radiator sprayer

I’m wondering how DP folks use a sprayer system to cool the engine…I use mine all the time when my temp goes over 190. I have a reasonable sized tank but I am thinking of plumbing my fresh water tank into it so I can drive further without having to refill the sprayer tank.

Any thoughts on ways to plumb the two tanks? My concern is that my tanks are 17 years old and I’m afraid they might be brittle and may crack when I go through them.

Thanks,
Dan

hershey

Albuquerque,(fulltime) NM, USA

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Posted: 11/08/12 09:05am Link  |  Print  |  Notify Moderator

Without know how much room you have to work with its hard to offer practical advice.
If you can mount a tank at the same level as the onboard tank you have now, just add a hose between the two on the bottom to self balance.
If you add another tank you could just add a simple valve that selects which tank is being drawn from.
If your needing to enlarge your tank size, I'm guessing you really need to address the cooling system of your MH.
I had a spray system on a conversion MH back in the 60's and I had a 5 gallon tank that supplied all the water I needed for that application. I only used it for a quick spritz on long grades.


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wny_pat

Western NYS

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Posted: 11/08/12 09:17am Link  |  Print  |  Notify Moderator

Dan,
You should not have to do this water spraying thing.

Get a copy of the December 2012 issue of Motorhome Magazine (should be available now on the shelf). There is a excellent article titled "Cool Runnings - Follow These Steps to Help Your Radiator Keep the Engine Cool." on page 48. It is a all about how to clean your engine radiator so it will work properly to cool your engine like the day it was new. You should be able to access it soon at MH Feature Stories, but it is not published there yet. Probably next month after the Jan issue comes out.

If you do a search, there are several tutorials which Wolfe10 has posted here on the forum which also give excellent instructions on doing this cleaning.


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FIRE UP

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Posted: 11/08/12 09:23am Link  |  Print  |  Notify Moderator

Gents,
Wow, I thought I was the only one on the planet that came up with a "Macgyver" idea to spray water on the radiator to keep things cool. We had a '79 Dodge Class C "Four Star" 23' m/h back quite a few years ago that had the infamous 440 in it. That engine would get seriously hot in/on many occasions. Well, I decided a "spray" system was going to be the answer. I set up a new piece of steel brake line, crimped on the end, drilled 1/16" holes about every inch or so and used a water pump from an RV to power the thing up.

I tied into the water tank on the coach for the supply. I'd watch that heat gauge climb to 220 and then I'd hit that button for the sprayer for about 5 full seconds, let it off for about 10, then, hit it again for another 5 seconds and it was way cool to watch that heat gauge plummet to 180 or less in about a 1-2 minute period.

That engine would run like that for a about 10 minutes and then, start climbing again. That of course, was based on what kind of grade etc. that I was on.

But, this is the first I've heard of anyone using such a system on a D/P to keep it cool. There's threads every now and then about the heating issues of some of these coaches/engines but, not heard of using this remedy. I like the idea because I too have it climb in heat during the long grades. But, like what's been stated, there's not much room at or near where I'd want to install the sprayer line.

But if I did, I'd certainly not have any problem tying into the water tank system. I've got plenty of water that's for sure.
Scott



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the bear II

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Posted: 11/08/12 09:33am Link  |  Print  |  Notify Moderator

I thought the spray system was the way to go to keep the temp down when climbing long grades. It worked well and the temp would stay down. I used a 12v window washer pump to pull the water from a large plastic (2 gal) tank I bought at a farm supply.

But then I started having trouble with overheating while stuck in traffic. It turns out my fan clutch was at fault. I replaced the fan clutch and added Redline's Wetter Water to the radiator. Haven't had a heating problem in 4 years....

Here's info on Wetter Water, it works:
http://www.redlineoil.com/Products.aspx?pcid=10

* This post was edited 11/08/12 10:05am by the bear II *

CA Traveler

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Posted: 11/08/12 09:34am Link  |  Print  |  Notify Moderator

Quote:

I’m wondering how DP folks use a sprayer system to cool the engine…I use mine all the time when my temp goes over 190.
How far over 190?

Both of my DP's will pull a sustained 7% grade at 110F and not get over 205F. Ditto for the tranny.

Perhaps you have basic cooling issues?


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catallison777

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Posted: 11/08/12 10:28am Link  |  Print  |  Notify Moderator

CA Traveler wrote:

Quote:

I’m wondering how DP folks use a sprayer system to cool the engine…I use mine all the time when my temp goes over 190.
How far over 190?

Both of my DP's will pull a sustained 7% grade at 110F and not get over 205F. Ditto for the tranny.

Perhaps you have basic cooling issues?


Thats what I was thinking. Mine never goes over normal unless it is a huge pull on a hot hot day. I would make sure the radiator was super clean and that it is cooling right.


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BillofPA

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Posted: 11/08/12 10:39am Link  |  Print  |  Notify Moderator

One thing to remember when doing this. Water usually has minerals in it and over a period of time as the water evaporates the minerals will be deposited on the radiator fins and that will hamper the cooling ability of the radiator and then you'll need to spray it more, etc.,etc.,etc.


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wny_pat

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Posted: 11/08/12 11:16am Link  |  Print  |  Notify Moderator

the bear II wrote:

... and added Redline's Wetter Water to the radiator. Haven't had a heating problem in 4 years....

Here's info on Wetter Water, it works:
http://www.redlineoil.com/Products.aspx?pcid=10

I've had several diesel mechanics say not to run Wetter Water in a diesel. But I notice that Red Line now makes a diesel version and also claim their regular Wetter Water is safe in diesel cars and light diesel trucks. But here is a interesting thread concerning it: http://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=1255926

grandpaswagon

San Diego

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Posted: 11/08/12 11:17am Link  |  Print  |  Notify Moderator

This is a Band Aid approach. Get your complete cooling system cleaned and flushed. How old is the radiator? Maybe time for a new and better one?

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