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Old 02-26-2016, 03:00 PM   #15
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BigD9,
EXCELLENT post.

We tow 5K 2005 Jeep Grand Cherokee in our 07. I messed up prior post, our rig had 20K and now we are at 40K. Note that I we get about same MPG. 6.5 is absolute lowest. Generally runs at 192 but I need to clean the radiator now because I have been seeing her creep above 215 pulling steep grades. I take her slow over the top & the exhaust brake will keep me from having to touch the brakes on the way down!
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Old 02-26-2016, 09:23 PM   #16
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Be sure your using the correct simple green. Use the product that is formulated to clean aluminum product, ie., aircraft and radiator fins. I had the 03 Excursion with 330. Certainly found it to have enough torque to handle the Great Smoky and Appalachain mountains. FYI, I upgraded the FCCC chassis with a couple of Supersteer products from Henderson Driveline in Oregon. What a difference in handling. Motion control inline air bag adjustment, Super Steer bearing bell crank "a must" and Koni shocks. The slobber tube catch basin is a must also. It's a very good coach.
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Old 02-27-2016, 01:50 PM   #17
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Thanks Everyone,
I get the radiator cleaning loud and clear. A friend of mine has a shop with a lift so I'll be sure to keep an eye on this very close. If I understand the posts, approximately 15-20,000 miles is the prime time to clean regardless.
Thanks Again and safe travels
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Old 02-27-2016, 02:08 PM   #18
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Quote:
Originally Posted by Clayobx View Post
Be sure your using the correct simple green. Use the product that is formulated to clean aluminum product, ie., aircraft and radiator fins. I had the 03 Excursion with 330. Certainly found it to have enough torque to handle the Great Smoky and Appalachain mountains. FYI, I upgraded the FCCC chassis with a couple of Supersteer products from Henderson Driveline in Oregon. What a difference in handling. Motion control inline air bag adjustment, Super Steer bearing bell crank "a must" and Koni shocks. The slobber tube catch basin is a must also. It's a very good coach.
If your planning on leaving the Simple Green on the radiator overnight then order the other Simple Green.

From the manufacturer;

When used with caution and according to the instructions, Simple Green All-Purpose Cleaner has been safely and successfully used to clean aluminum.

BigD9's earlier post (3rd post down);
Cleaning the radiator fins
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Old 02-28-2016, 06:53 AM   #19
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Thanks, but ten minutes or small work areas when cleaning the inside of the CAC? Im not flexible enough nor fast enough to perform adequately nor do I feel you'll have a thorough job. Why take a chance on your radiator? In my experience the cleaning both exterior and interior of the 39's is improved by multiple flushings and allowing the correct Simple Green to do its degreasing job. (Overnight or hours). JMHO but I'm not chancing my radiator on a corrosive formulation.
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Old 02-28-2016, 07:24 AM   #20
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In past work life I had HVAC contractors that used a solution of cleaner specifically made for aluminum cooling fins on refrigerant units that left them sparkling clean. I'll find out what the product was, if its available to the public and report back. I can tell you it worked like a million bucks. Pretty much "melted" the grime away.
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Old 02-29-2016, 06:20 AM   #21
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Aluminum fin cleaner!

Quote:
Originally Posted by discovery39s View Post
In past work life I had HVAC contractors that used a solution of cleaner specifically made for aluminum cooling fins on refrigerant units that left them sparkling clean. I'll find out what the product was, if its available to the public and report back. I can tell you it worked like a million bucks. Pretty much "melted" the grime away.
That would be very much appreciated. Any time saving element on maintenance for CAC spraying and cleaning is worth it to me. Hate that job.
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Old 02-29-2016, 07:25 AM   #22
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Just want to add my comments for the OP. I have the '05 D 39s and am very happy. You should join Discovery Owner's association international. They have a yahoo group. There is not a problem you will have that someone else hasn't already had and will talk you through the diagnosis.

I had a caterpillar technician look it over before I bought and did a number of tests. All were good and my engine purrs like a kitten.
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