VCCA Home Forums TECHNICAL - 1945 AND EARLIER 1929-1932 Oil pan attachment

Finally dropped the pan on my 1931 Sport Coupe engine. Amazed at how clean things look…it has not been run since the 1970s.
Anyway, little details that don't get written down: Two of the attaching machine screws (one on each side) are one inch and extend up through the engine apron (or whatever you call it). What is supposed to be attached to these?

My '30 block had 2 such longer screws, which protrude through the block flange on driver's side and secure 2 things; the forwardmost screw secures a bracket holding the oil filler pipe in place, and the second screw a clamp tieing down the oil pressure line going towards the cowl and eventually feeding the oil pressure gauge. Not sure if '31 is same?

On the 1930 engine there is no bracket for the oil filler tube because the oil filler tube is a little dinky thing. Sounds like you might have a 1931 oil filler tube on your 1930 engine, and, if so, that tube does require a bracket.

OK, I'll be good I guess with a '31 filler tube on a '30 engine assuming there are no technical issues. After all the car is a mix of 29-31 mechanicals.

Considering that you have 1929 to 1931 mechanicals, you are doing just fine with a '31 oil filler tube on your '30 engine.

If the intent is for the engine to look like a '31 in a '31 car then the '31 oil breather, draft tube is what is wanted. Now if you are more concerned that a couple of oil vapors might just escape into the atmosphere then the '30 tube with pipe to air cleaner would be more appropriate. Of course you would also need the '30 air cleaner which is not easy to find.

This discussion was fine but I can't see any answers to my basic initial question.

In first response above it is explained, both long bolts go on driver side. For '30 the bolt closer to the front of the crankcase on my car holds the clamp for the oil filler pipe (even though '30 engine did not have a clamp, so my cranckcase may have been tapped out for this longer bolt), and the one nearer the back holds a clamp for the small oil gauge copper line. I am not aware of any need for a longer bolt on the passenger side. Now if you are asking if '31 layout was different, someone else will have to answer as I have a slightly modified '30 engine in my '31 Coach (mine has '30 block, a' 29 head/valve train, a '31 filler pipe and '31 air filter, etc).

OK, I got the L shaped clamp for the oil tube and see where that goes. I am. almost sure, however, that one of the one inch screws was on the passenger side because when I crawled out from under there was a square nut lying on the ledge on the passenger side and I do remember removing one from each side.
The pan had obviously been removed at some time in the past since most of the flat washers were missing...and I find that the nuts on the #6 connecting rod are not original castle nuts but some kind of halfa---- replacement. At least everything seems to be quite tight under there!
I find that the parts book lists 836481 as Clamp, oil filler rube. I do not recall removing any such thing but maybe I did many moons ago and forgot. If I had some idea what it looks like I could check through the miscellany.
Also, I found two items in the sludge in the pan. I'll post a picture. The nut is the right size to go with the little bracket, but where does it go?

I'll post a couple pics of the 2 clamps on driver side. You may want to check passenger side crankcase flange and see if there is a tapped hole to take the longer screw. There are no such holes on pass side for my '30 crankcase.

There are no long bolts on the passenger side of the engine block.....just on the driver's side.

I have a "30 air cleaner. Thinking of posting it on ebay.

I have posted photos at left of both sides of my '30 engine, showing where the longer oil pan screws come through the crankcase flange. One supports a clamp for the '31 filler tube and the second (hidden behind the exhaust pipe)a clip for the line for the oil pressure gauge. Hope these help. Note there are no holes in flange on passenger side.