I am forgetting a simple fact of life about these old engines.

The oil galley is that bulge just above the oil pan on the drivers side of the engine, yes? The oil should go to the external oil filter from this port in the galley.

There is another port just above the edge of the oil pan and furthur forward on the drivers side of the engine. This is where the oil dumps back into the pan from the filter. Do I have this backwards? I am doing this from my tired old memory. Please clarify for me.

Thanks, BH

BH,

It depends on which engine you have, do you have a bypass type or a full flow 261"?

Tim

It would be a full flow engine 1956

Also, a full flow 261 had a steel pin in the side of the block near the galley port. This steel pin needs to be hammered into the block about 1/4" causing the oil to flow out of the galley
port, through the oil filter and back into the pan port from the oil filter.
I do not know if the 235 had a steel pin or not?

Please clarify this as well. I will write it down for future refereance.

Thanks a lot,
BH

If it is a full flow engine it will have the oil OUT from the pump just above the pan rail, center of block, drivers side. The Oil IN to the galley is higher and to the aft of the outlet. Both of these ports are large pipe thread. Just above the oil OUT there will be a plug that is driven in to make it totally full flow. If the engine is run without these ports connected, and the filter oriented correctly, oil starvation WILL result.

Tim

If the engine is really a '56, then it would be a bypass system, and the oil lines would be 1/8" NPT at the block. On '58 and earlier 261's, and all 235's, the rear oil line goes to the filter, and the return line from the filter goes to the fitting near the center of the block.

'59-63 261's are as Titen says. they are 1/2" NPT at the block.

OK,
Ive got it.
My 261 engine has the large pipe thread ports as you have said.
I am going to sketch it out for future referance.

My freind has a 59 235, it sounds like his oiling may be connected differently.

Thanks for your knoledge and for sharing it.

BH