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For any of you that want to make up your own stainless braided hoses with AN (aircraft quality) ends, but didn't want to invest all the money in the AN assembly, and cutting tools which can get expensive, oh and then there is the an wrenches so you don't scratch the ends. This is how I do my hoses, all you need is a couple different size hose clamps, a cut off tool, air or dremel will work, a bench vise and some masking or electrical tape. First off all measure out the hose you will need, measure twice cause you don't want to mess this up. Stick your hose horizontaly in the vise, slide on your , hose clamp, and clamp it down on the hose on the back side of your cut mark and tighten down until it wont slide, but not to tight to where it deforms the hose too much. Then get your cut off tool and cut around the hose using the clamp as a guide. The clamp will keep your braided steel from fraying and pulling. Now, take and back your clamp off just a smidge and take your fitting and start screwing it on the hose, as you are doing this slowing loosen the clamp so it slides easier as your screwing the fitting on. Once you have the inside lip of the fitting seated against the hose, you can grab the other end of the fitting, put a small amount of lubricant on the nipple and the threads, and go ahead and screw it in and tighten, you can use some electrical or masking tape on the inside jaws of your wrench if you don't want to scratch the pretty fittings. There you go, no $250.00 in special an tools needed, and you have an aircraft grade hose and fittings that you will never have to worry about leaking or replacing again.:thumb:
 

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Discussion Starter #3

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My 6.5 scared a prius
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nice mike :thumb::coolnana:
 

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Something that always confuses me when looking on summit's catalog is that is seems the way it is presented that only certain fittings will work with certain hose. Has anyone seen a chart of some kind that shows compatibility?
Another thing about the hose for sale on Summit is that the majority of it is only rated for a max of 250 degrees F. The engine oil in a 6.5 can exceed that. That is why Leroy and Lube Specialist use hose rated for 400 degrees F. Regular hydraulic hose is only rated for 250 degrees.
 

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Discussion Starter #7
Something that always confuses me when looking on summit's catalog is that is seems the way it is presented that only certain fittings will work with certain hose. Has anyone seen a chart of some kind that shows compatibility?
Another thing about the hose for sale on Summit is that the majority of it is only rated for a max of 250 degrees F. The engine oil in a 6.5 can exceed that. That is why Leroy and Lube Specialist use hose rated for 400 degrees F. Regular hydraulic hose is only rated for 250 degrees.
For instance, any -10an hose will work with any -10an fitting, so on and so forth. As far as them using 400 deg. rated hose, uhhh- um, cough, cough, ok.:HiHi:
 

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perfect timing, thanks a lot Mike.
 

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Discussion Starter #9
I mostly use Summit branded hose as it is a little cheaper. Notice the heat rating.
Brand:Summit Racing
Manufacturer's Part Number:SUM-230003
Part Type:AN Hose
Product Line:Summit Racing® Stainless Steel Hose
Summit Racing Part Number:SUM-230003


Hose Size:-10 AN
PTFE Lined:No
Hose Length (ft):3.000
Outer Material:Braided stainless steel
Hose Color:Natural
Hose Material:Rubber
Hose Inside Diameter (in):0.563 in.
Hose Outside Diameter:0.797 in.
Minimum Recommended Temperature:-40 degrees F
Maximum Recommended Temperature 300 degrees F
 

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Discussion Starter #11 (Edited)
Here is the hose that should be used for the engine oil cooler lines: Stainless Steel Braided Hose | PTFE Hose | R14 | SAE 100R14| Hydraulics Direct
Here are steel fittings for the R14 hose:SAE 100R14A Reusable Hose Fittings > Discount Hydraulic Hose.com
That would be good hose to use, but it is not AN hose, and will not work with AN fittings, and is not what you get from the sellers of the oil cooler lines. The summit hose I use consists of a synthetic-nitrile inner tube with a partial stainless steel reinforcement inner braid, and is rated for fuel, oil, and coolant. It will work fine for anything on our vehicles.
 

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That would be good hose to use, but it is not AN hose, and will not work with AN fittings, and is not what you get from the sellers of the oil cooler lines. The summit hose I use consists of a synthetic-nitrile inner tube with a partial stainless steel reinforcement inner braid, and is rated for fuel, oil, and coolant. It will work fine for anything on our vehicles.
Agreed, and I used the same hose as you although I didn't buy from summit.

Actually just got done switching my oil cooler lines over to reusable fittings using almost all steel (could find one adapter in aluminum only) and routed through the stock locations.
 

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Agreed, and I used the same hose as you although I didn't buy from summit.

Actually just got done switching my oil cooler lines over to reusable fittings using almost all steel (could find one adapter in aluminum only) and routed through the stock locations.
Nice!

What fittings did you use for the block connections? Part numbers? Vendor?
 

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I'm not familiar with how exactly AN fittings work. Can you give a quick summary of how they attach to the hose? It looks like very useful knowledge.
 

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I just wanted to mention that anyone worried about the 300 deg. heat rating for the an hose for the oil cooler lines, that oil temps on a hard pull can reach 15 to 25 deg. over the coolant temp. If you were to exceed the 300 deg. on your oil temps then you have already fried the engine anyway. That 300 deg. rating for the hose is a sustained heat rating and it will stand up to higher temps for short periods of time.
 

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Nice!

What fittings did you use for the block connections? Part numbers? Vendor?
I mismatched some of the fittings to cut cost, but basically;

(1) straight 3/8" npt to AN 10 block fitting (fitting closest to camera in my pic), Fragola part# FRA-581611
(1) 45* 3/8" npt to AN 10 block fitting (behind the other fitting in the pic), can't find part number but it was off ebay.
(1) 45* reusable AN 10 fitting, Eaton part# 42508N-690.
(2) 45* swivel AN 10 adapaters (for oil cooler), part# 6502-10-10.
(2) Aluminum AN 8 to AN 10 union, got off ebay, just search for that. Adapts oil cooler to AN 10 line size.
(3) Straight reusable AN 10 fittings, got these on ebay again in a lot of 4 for $20.

To explain what I did;

The exhaust manifold was hard to clear so I needed a 45* reusable fitting on the close (in pic) fitting, and on the rear fitting (in pic) it needed to use a 45* 3/8" npt at the block and used a straight reusable fitting there. I have about 1/8" clearance there.

At the oil cooler I would have used two additional eaton 45* reusable fittings, but I got the last one on amazon for ~$10, and once they got new stock it shot up to ~$33. This is where I got the 45* swivel fittings and put the straight reusable fittings on instead.

The AN 8 to AN 10 adapter is not the true adapter for the early oil coolers, but they are so close you can wrench them in carefully (aluminum actually helped here because it took the shape of the cooler threads better), and with thread sealant they won't go anywhere.
 

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That would be good hose to use, but it is not AN hose, and will not work with AN fittings, and is not what you get from the sellers of the oil cooler lines. The summit hose I use consists of a synthetic-nitrile inner tube with a partial stainless steel reinforcement inner braid, and is rated for fuel, oil, and coolant. It will work fine for anything on our vehicles.
I believe you are mistaken. I contacted Leroy last night and got a reply this morning. He said his hoses are rated for 400 degrees F or higher:confuzeld. I also sent a PM to greg from lubrication specialist[site sponsor] questioning his oil cooler hoses. Perhaps he will join the conversation to clear this up:coffee:.
I personally wouldn't use a hose only rated for a few degrees more than the engine oil temps can spike to. Not a good place to cheap out. A couple dollars more for the better oil cooler hose, could save your engine.

Are AN hose ends available in steel, stainless or brass? I'm not fond of any aluminum threads and hexes that are easily damaged. Weight is not a concern for me in a 6500 lb truck.
 

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I believe you are mistaken. I contacted Leroy last night and got a reply this morning. He said his hoses are rated for 400 degrees F or higher:confuzeld. I also sent a PM to greg from lubrication specialist[site sponsor] questioning his oil cooler hoses. Perhaps he will join the conversation to clear this up:coffee:.
I personally wouldn't use a hose only rated for a few degrees more than the engine oil temps can spike to. Not a good place to cheap out. A couple dollars more for the better oil cooler hose, could save your engine.

Are AN hose ends available in steel, stainless or brass? I'm not fond of any aluminum threads and hexes that are easily damaged. Weight is not a concern for me in a 6500 lb truck.
Motor oil typically breaks down at 350*F or a little over, so if the hose can handle a spike to 350 or 400 you should be ok, because, well, your oil is ruining your engine like Mike said. If your oil is sustaining a 350 temp then something is wrong in the cooling process.

AN fittings are in steel, but they are typically called JIC which are the same flare degree and thread, but made to a lesser tolerance. For our application, that means nothing is different that is concerning.

As for aluminum, Leroy Diesel mentions his fittings are aluminum with his kits on his site. I didn't like this and was not going to pay $150+ for something I didn't 100% like, regardless of how many happy customers he's had. My main concern was the aluminum block fittings screwing into an iron block. Aluminum has close to twice the heat expansion rate as iron. Would that mean the aluminum will crack? Probably not, but I'm an engineer and look at these obscure details.
 
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