Lynn Hanover wrote:
>
> 
> The fittings from different manufacturers should not be interchanged.
> The fittings from different styles from the same manufacturer should
> not be interchanged. Be aware that AN (Airforce-Navy Standard) (the
> airplane stuff) and JIC (Joint Industry Standard) look identical.
> The SAE hose looks exactly the same as well but will more likely have
> 45 drgree flair angles rather than 37 degree flair angles.
> ........
All the fittings on the engine are AN fittings, and purchased from
Summit Racing by me, unless Chris has changed something since my exit
from the project.

The oil conduit hoses weren't the 3000 lb test but it wasn't cheap hose
by any means. It was build-a-hose kinda stuff from Summit.

Unless he has changed things, the front oil pressure relief was stock
and the rear oil pressure valve was stock.
The cooler was before the filter. The cooler was a mazda cooler.

The aftermarket oil filter mount has arrows on it indicating in/out for
flow.

 

I just checked the Summit Catalogue, and the page says the fittings are "AN". That suggests, at the least, that the pieces would be legal on a real airplane if you had the paper trail to an approved manufacturer. I saw no mention of pressure rating, but even the lowest rating would be well above anything a homebuilt plane would need. I have hundreds of buys from Summit and never a bad part.

 

If the hose was assembled at home and not tested by a hose shop, then my idea about the hose is still valid. There are some tricks to assembling hose ends that do not show up in the directions. The process is easy if you have done it a few hundred times. 

 

The Teflon liner is very soft and can be damaged easily during assembly. A single piece of braid wire folded back can pierce the liner on assembly or months later.

 

You must inspect the whole piece of hose before assembly for a single broken braid wire. If you can see both ends of the failure, fine. If only one end, the other end is free on the inside of the braid next to the hose liner. Cut the hose through the broken braid and use the remaining pieces if you can, for shorter runs.

 

If all of the other statments are accurate, it has to be the hose.

 

Lynn E. Hanover