Engine and Transmission Tech

Gents, I recently had a high speed altercation with a Maserati. Pulled him by 2 car lengths up to 120MPH, at which point I decided I was too old to be doing something so stupid. As I coasted down, one of my oil filter hose clamps failed and the motor proceeded to empty the crankcase of oil. I averted disaster by immediately shutting down the motor but no longer trust my remote filter hoses that are held in place by standard hose clamps. So I have 2 questions:

1. Is there a premium hose clamp suitable for a high pressure line such as an oil line?
2. Would something like this be suitable [www.ebay.com] ?

A hydraulic hose will always be the most secure method, but suggest you go to AN- type or similar fittings if you have to use external lines.

Jim

Crimped hydraulic fittings and wire-reinforced hoses are typically rated at 3000 psi. Your oil pressure should never go over about 80 psi. Rubber-lined AN hoses and fittings add bling but are rated at substantially lower pressure. Only the teflon-lined AN hose is rated as high as hydraulic lines. Normal worm-drive hose clamps and rubber hose is not your best choice.

My remote filter is 1/2 NPT fittings. Since its NPT, is the line that I show in my 1st post suitable?

That type of hose is as good as it gets, they will never burst under normal circumstances. Make sure they do not chafe, once the rubber cover is cut moisture soon corrodes the wire reinforcement and they will fail quite quickly as they become an unreinforced rubber hose.
You can make your own quite easily by using the type of fitting in the following Ebay photo.
[www.ebay.co.uk]
You can buy these fittings in a multitude of combinations of thread size, angles and male/female thread. To make them up, you screw the elongated nut onto the end of the hose (left hand thread) and then lubricate the threaded tube and screw it into the elongated nut which has just been fitted onto the hose. As you srew it in the taper of the tube expands the hose securely onto the nut.
They are used extensively in agriculture and only fail due to neglect.
Philip

The NPT ends do create a problem when you go to hook it up. Visualize this: How are you going to screw in the second end of the second hose once everything else is connected? Bit of a problem, hmmm? Plan accordingly. This is why even hydraulic valves with NPT threads are usually fitted with NPT-to-AN adapters. Also avoid like the plague putting 90° fittings on both ends of a hose.

Your local NAPA and many other stores make custom hoses.

Jim

Jim, that's exactly what I figured out. There would be no way to hook up the 2nd hose to the remote filter adapter. Pondering continues.

Keith, we carefully measured and had them fabricated from SS high pressure hyd. hose (Overkill) and they added AN fittings to at all 4 ends. Due to tight space and mounting the filter at rear in an easily accessible position during draining process, the 4 AN ends were invaluable. Note: used Crowfoot wrenches to connect to adapters and ported the oil filter adapter that attached to the block.

Porting and attention to pump end clearances are invaluable in terms of oil pressure. On my 340 Buick I have 60+ psi oil pressure, 15 psi at slow idle.

Jim

I have no idea what AN fittings are, in the UK the most common are BSP (British Standard Pipe thread) , the female ends are almost exclusively of a loose nut type which you can clearly see in the photo from ebay. The beauty of them is that they are interchangable ie all 1/2 males will connect to all 1/2 females.
[www.ebay.co.uk]
If AN fittings are a US equivalent they are ideal and a loose nut fitting on one end whether a crimped or reusable fitting makes for easy fitting.
Philip

Phil, the AN fittings are a US standard (the An is Army-Navy). These are standardized so all branches of armed forces use same tools. The are 37 degrees flare and almost bullet proof, our std flare is 45 degrees. . Probably have to source thru US company that has racing supplies. Summitt. Jegs, Speedway Motors to name a few. Also available on E-Bay US.



Edited 1 time(s). Last edit at 12/28/2015 07:21PM by kstevusa.

Basically the same as JIC fittings.

There is also a very good equivalent that uses a face seal and o-ring but those tend to be a little harder to find and more expensive. The advantage is that clamping pressure is not much of a concern.

Jim

Jim. is the JIC type a "Just In Case " it leaks? :-) BTW, thanks for confirming I did not waste my time porting the remote and block adapters for my 5.0L Ford/MGB conversion. The casting was sorta rough and the smooth transitions obviously make a smoother flow of lubricant.



Edited 1 time(s). Last edit at 12/28/2015 07:28PM by kstevusa.

Oil hoses are inelegant. There must be a way to get rid of them altogether.

If this Ford Racing adapter won't clear the steering rack, isn't there some way to modify it?

The Fords have a real problem with frame clearance in that area. Early conversions cut the frame for clearance, later a hose adapter was found that was thin enough to clear the frame by just enough to make it work without cutting but I doubt there is any sort of an available filter adapter that would fit. It would probably take something custom that positioned the filter longitudinally projecting forwards right on top of the frame. A one-off shouldn't be all that hard to fabricate, given the right equipment.

Jim

Ok, It seems I need 36 inch 10AN hose and straight 10AN fittings along with a 10AN to 1/2 NPT adapter fitting. I found the fittings but does anyone know of a domestic provider for a complete 36 inch hose with 10AN fittings? I find a lot from China but would prefer a US maker.

Any NAPA store can make those up on the spot. I use a local Parker store because they are close. There is bound to be a hydraulics shop not far away.

Jim

Thanks Jim! Another winter project for my list! :)

I wonder if the remote hoses from a gmc typhoon would work for you? It puts the filter up on the driver side wheelwell, up high. Just a thought.

I am about to tackle the same remote filter project for my Rover 3.5 and was wondering if there is any reason that the hoses Keith posted about couldn't be used with 1/2 inch NPSM swivel fittings to connect them to the filter base? I came across this [mdmetric.com]. Which seems to say on page 3 that NPSM swivel adaptors can be used to connect NPT fittings, and at $5 each they seem like they could be a pretty reasonable solution.

I was thinking of using a Derale 25752 filter base with 1/2 " NPT ports
[www.ebay.com]


And then using something like this
[www.grainger.com]$


To connect the preassembled hoses
[www.ebay.com]




Is there a reason why that wouldn't work and I should just go with the AN hose and fittings $$$ ?



Edited 2 time(s). Last edit at 01/05/2016 01:43AM by 4.6 MGB V8.