[Jacques Reed]

Hi Serge,

As Harry pointed out the return line from the filter goes straight back into the oil pan.

There is an SAE inverted flare elbow at the forward end of the pan where the return line attaches. See photo.

Just looking at your photo it seems you have used copper tubing to the filter.
May I suggest you use steel Bundy tubing instead for two reasons:

Copper tubing can work harden and get brittle with vibration as can occur on any machinery part. If it fractures, there could be a catastrophic loss of oil pressure.

The other reason is that the fittings are designed for SAE inverted (double) flares. These are the type of flares required wherever there is liquid under pressure inside the tubes to ensure a leakproof seal. Steel lines with double flares are used throughout the braking system for this reason. Despite the appearance, all my tubing on the truck is steel Bundy tubing. Bundy tubing has a copper patina caused by the way it is made.

If you do not have the fitting on your oil pan, or a place for it, you may have a civilian car engine pan which did not usually have filters fitted.

If so, you may have to add a fitting or a doubler plate to the pan and drill and tap it for a 90 degree elbow.

Hope this is of some help.

Cheers,