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Old 05-09-2015, 10:21 AM   #15
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Ive seen that so many times. AC condenser, oil cooler, trans cooler, radiator. You have to physically separate them to clean properly every once in a while. How many people have seen the " take out the thermostat" or "change out the pump"?
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Old 05-09-2015, 10:51 AM   #16
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Overheating!

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Ive seen that so many times. AC condenser, oil cooler, trans cooler, radiator. You have to physically separate them to clean properly every once in a while. How many people have seen the " take out the thermostat" or "change out the pump"?

This one appears to have had a Cummins factory reman engine in 2004. Don't have any maintenance records prior to the last owner. It could have as few as 7000 miles on it. Who knows! It runs very strong and clean. The oil analysis came back great except for the silicon. It's been run in a dusty environment with a significant oil leak at the oil return cover on the air compressor. Figuring out the history is nearly impossible. On the other hand maintenance records can be misleading. This thing had a $1200 "full service" and inspection last November before its emissions test. Several overheating repairs before that including reversing the lines on the transmission cooler to have "hot to hot, cold to cold".

They had even installed an electric fan on the rear of the radiator to improve the air flow. That was installed at an RV shop in Colorado a couple years ago.

No idea why the oil leak wasn't addressed and the radiator cleaned. It had obviously been run that way for a long time.
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Old 05-09-2015, 10:59 AM   #17
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Overheating!

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It took a couple hours of wandering through the rubber jungle at a helpful NAPA to find a moulded hose that fits well. This is the top hose coming off the thermostat gooseneck. It avoids the air trap if flex is used. Fits real nice. I trimmed about an inch off to keep the elbow closer to the engine. Also reduces stress on the radiator inlet, compared to flex, which probably lead to that crack.
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Old 05-10-2015, 11:38 AM   #18
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Really the ideal score...the PO got so frustrated they just wanted to get rid of it. The CAC and radiator got removed and rebuilt during my motor overhaul, and there they took out an AC cooler that had been disconnected (it got moved to the front of the RV). It's great that you have been able to jump into working on your new rig...please do share details and projects so we can follow along with ours. The numbers and photos you post are a huge help!
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Old 05-11-2015, 12:04 AM   #19
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Is there not a transmission cooler in there?
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Old 05-11-2015, 12:43 AM   #20
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Thanks for sharing Kota, added this to my 'to do' list.
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Old 05-11-2015, 12:56 AM   #21
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Is there not a transmission cooler in there?

It's that grey cylinder in the picture with the green striped hose and 2 hydraulic lines hooked to it. It uses a fluid to fluid heat exchanger.
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Old 05-11-2015, 06:31 AM   #22
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Excellent job !
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Old 05-12-2015, 06:12 PM   #23
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So, is the crankcase vent an open system with a hose that drops out the bottom? Would it not be a cheap solution to run it out to the rear lower area past the radiators and just let it vent if this is he case?
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Old 05-12-2015, 07:20 PM   #24
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So, is the crankcase vent an open system with a hose that drops out the bottom? Would it not be a cheap solution to run it out to the rear lower area past the radiators and just let it vent if this is he case?

If your not towing anything. There are cheap and easy solutions including oil catch cans that you have to periodically drain. I'll probably spring for the PH system. It captures the oil and returns it to pan. The green solution. I do live in boulder ya know!
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Old 05-16-2015, 11:33 PM   #25
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Took a look at mine today...not a very nice solution unless you're trying to make a big mess...?
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Old 05-17-2015, 12:30 AM   #26
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So he idea would be find a spot to install the Racor unit and run the outlet back into the air line between the CAC and the intake manifold (buy the fitting) and find a way to drain the oil back into the oil pan?
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Old 05-17-2015, 03:36 AM   #27
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So he idea would be find a spot to install the Racor unit and run the outlet back into the air line between the CAC and the intake manifold (buy the fitting) and find a way to drain the oil back into the oil pan?

That wouldn't work. The closed loop systems return the crank case air just after the air cleaner. If the oil separation and filtering are not adequate it makes a mess of your turbo and CAC lowering their efficiency.

The open loop systems capture the oil and drain it back to the oil pan and are still ventilated to the atmosphere. This is what I'll do.
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Old 05-17-2015, 04:31 AM   #28
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I have got to get to Colorado sometime to check all this out. It would also be nice to talk airstreams over coffee with someone who drinks it at the same time I do!
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