Part No. Constant Pressure Clamps Oil Return Lines

[Frankster13]

I would like to order constant pressure clamps for my O-390 oil return lines. It seems the traditional clamps end up leaking with time. Can anyone provide a part number for a set of quality clamps. I do not want to put parts from amazon on my engine.

 

[rc dude]

If you can measure the diameter of the lines, McMaster carries them in multiple sizes. https://www.mcmaster.com/products/h...on-spring-band-clamps-for-firm-hose-and-tube/

 

[PaulvS]

I would like to order constant pressure clamps for my O-390 oil return lines. It seems the traditional clamps end up leaking with time. Can anyone provide a part number for a set of quality clamps. I do not want to put parts from amazon on my engine.

Norma is a good quality reliable brand, made in Germany. The PDF data sheet is attached. I took the hose to the store and the matching clamp size was 19mm.

The hose that I used is MIL6000D 3/8 ID as recommended by Vic Syracuse. 1 foot was sufficient for O-320.

Mil6000D Oil And Coolant Hose | Aircraft Spruce

Mil6000D Oil And Coolant Hose Inside and out, Aircraft Ducting MIL-DTL 6000D is designed to handle the effects of oil, alcohol, coolant, and water. The tube is oil resistant with a black cover reinforced with high strength mildew resistant

www.aircraftspruce.com

 

[hgerhardt]

I would like to order constant pressure clamps for my O-390 oil return lines. It seems the traditional clamps end up leaking with time. Can anyone provide a part number for a set of quality clamps. I do not want to put parts from amazon on my engine.

My original post about this subject: https://vansairforce.net/threads/source-for-oil-return-hose.151126/#post-1185599

Clamp size depends on the hose you end up using. I always recommend Gates power steering return hose in 3/8", and with that, you need 16-17mm clamps. McMaster is a good, non-Amazon source and these clamps would be fine with the Gates hose. https://www.mcmaster.com/7329K12/. The hose is https://www.gates.com/us/en/search.p.7741-000000-000000.v.7741-06197.html