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Old 09-11-2013, 06:03 AM   #1
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So many radiators, so little time

I searched the forum but didn't find the info I expected. My rig has a side radiator but also has at least 3 more radiators in the back. Two large aluminum and one small, along with the ginormous power stealing fan. Forgive the newbie question, but is this "normal". I half expected just the side rad.
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Old 09-11-2013, 07:11 AM   #2
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Quote:
Originally Posted by obwahn View Post
I searched the forum but didn't find the info I expected. My rig has a side radiator but also has at least 3 more radiators in the back. Two large aluminum and one small, along with the ginormous power stealing fan. Forgive the newbie question, but is this "normal". I half expected just the side rad.
Thanks
Mine has: Radiator for keeping the engine cool + Air Charge cooler for keeping the air cool into the turbo + Fuel cooler for keeping the fuel cool + A/C condenser for keeping my butt cool + all of these need a fan to keep the air moving through these coolers so they are effective.
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Old 09-11-2013, 05:02 PM   #3
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Mike.....First, you don't have a side radiator. The small one you see behind the driver's rear wheels is the cooling condenser for your dash A/C (same unit you have in your car infront of your radiator). Yours is a rear radiator coach. You have two units in the rear. The upper one that looks like a radiator is the Charge Air Cooler. Your diesel is turbo charged, which means that you get more power by taking some of the hot exhaust gases and pushing them right back into the intake of your engine (like pushing more air through your air cleaner). Because your engine would not run well with hot exhaust being pushed back into it, the Charge Air Cooler cools it down before going back into the engine.

Directly underneath that unit is your radiator. They're stacked atop each other. That huge fan is your engine fan. It draws air from under your coach and blows it out the back. If you stand behind your coach while it's running, the air coming out will part your hair.

The third cooler is probably an added on trans cooler.
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Old 09-11-2013, 06:17 PM   #4
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Thanks to both you gents for setting me straight.

Yes Don, the hurricane out the rear is somewhat noticeable. :-). Now I'll go sulk for displaying even more of my newbieness (new word I just coined)
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Old 09-11-2013, 06:20 PM   #5
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Actually I should have said "I knew that", and I was just testing YOU guys. Let's see if that flies.
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Old 09-11-2013, 06:30 PM   #6
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As they say, there are no dumb questions. The more you learn about how your coach works, the more you'll enjoy it.
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Old 09-11-2013, 06:38 PM   #7
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As they say, there are no dumb questions. The more you learn about how your coach works, the more you'll enjoy it.
I'm supposed to enjoy it too?!!!! Dang! I thought I was just supposed to dump money into it. Thanks again! :-)
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Old 09-11-2013, 07:26 PM   #8
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Your diesel is turbo charged, which means that you get more power by taking some of the hot exhaust gases and pushing them right back into the intake of your engine (like pushing more air through your air cleaner). Because your engine would not run well with hot exhaust being pushed back into it, the Charge Air Cooler cools it down before going back into the engine.
Diplomat Don
I don't think a turbocharger takes some of the hot exhaust gases and pushes them right back into the intake of your engine.
(IMO, only fuel, and clean air, goes onto the intake of an engine).

This is my understanding of the "how and why" of a turbocharger and a CAC:

The drive blades of the turbo are spun by the exhaust moving through it, (causing the incoming filtered intake air to be compressed by a second set of blades).
That forces more air into the engine, (aka: compresses the fresh filtered intake air)!
More air results in more power!

When air is compressed it gets HOT.....
The CAC cools that turbocharged, (aka: compressed), hot clean air to an efficient operating temperature before the engine "eats" it.
Cooler air also results in more power!

on all of your radiator information!

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Old 09-11-2013, 09:51 PM   #9
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You're right...trying to make it simple since he wasn't familiar with what he has.
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Old 09-12-2013, 07:13 AM   #10
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Mel and Don,
Thanks so much for all the clarification on just what is sitting in my front yard. :-) It is information like this that helps all us newbies thru the maze of MH ownership.

Thanks to this forum I learned that our "new to us" coach still has its original tires, 2002! Needless to say she is somewhat parked until we build up the funds for 6 new tires. If I had known BEFORE, I would have made new tires part of the purchase. Oh well, live and learn, hopefully.
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Old 09-12-2013, 07:17 AM   #11
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I'm supposed to enjoy it too?!!!! Dang! I thought I was just supposed to dump money into it. Thanks again! :-)
Welcome to the "Empty Wallet Club"!
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Old 09-12-2013, 03:22 PM   #12
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Mike....Hankook makes an excellent tire that will fit your coach (AH12) that is reasonably priced. Put two on the front and use the coach until you can do the rears.

The Hankooks are about $400 each installed, which is a far cry from what they get for the Michelin or Goodyear in that size.
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Old 09-12-2013, 07:22 PM   #13
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Thx for the idea Don.

Mike
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Old 09-13-2013, 06:02 AM   #14
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Mike,

I noticed you said you had 3 radiators in the back. I didn't see where anyone addressed the 3rd "radiator". On my MH, the small radiator you mentioned is my transmission cooler. As Don and others stated, you have an A/C condenser on the drivers side behind the rear wheels and in the rear sits the radiator, CAC and more then likely a transmission cooler.
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