I usually install an outside oil line but in this recent engine rebuild I have found a small funnel internal oil return. Do most people pull them out and install the later large internal funnel?
I would. Why wouldn't you want more oil? Good luck with your project. Bill
Ok ... so there is no difference in the block between funnel applications? And are the reproductions a better option than an original in this case?
Yes, they are. There's also an accessory internal oil line that runs along the left side of the pan.
Maybe they bolt to different bolts(?) otherwise no difference. An original part, if at all available, is almost always to prefer before repros. Ford , especially by 1925-27, when the large funnel pipes were made, really knew what they were doing - and did it good. Repros have been reported to fall apart, needing better brazing before use - and some tweaking to not come in contact with the rotating magnets..
Nothing wrong by adding an outside oil pipe too - especially the Texas T high volume style makes a difference.
Ford published a paper showing why they changed the size of the oil funnel. It's easy to see why the change was made. Note that this is with the SAE 20 oil that Ford specified. A thicker oil will flow slower than this.
Both will interchange, the larger funnel is the way to go.
Original oil lines
The repro new large funnel is made a bit different in the mounting flange. Had to trim it with tin snips as didn't fit well and you don't want the funnel to stick out too much, the flange didn't want to lay down under the bolt head, as it was too wide.
Trimmed flange and re-bent to fit. Plus note the dab of extra braze on the funnel and pipe. The modern replacement can have a poor solder joint there. And to be safe, wrapped some of the safety wire around the tube to pull the funnel flush. No need in having the funnel stick up and hit a magnet on that spinning flywheel
Even original funnels can come apart there!
When was the change to the large funnel made?
"JUL 17 Engine production records, Ford Archives
New style transmission covers began. New oil tube with a larger funnel began this date and was used in all production beginning August 12."
So it's a 1925 model year change.
The repros can be OK, but some may need a bit of massaging to fit right and not be hit by the magnet bolts. I did not assemble this engine, but I did have the task of going into it.
I'm a new believer in replacing the oil line funnels in the engine. I just had a small funnel oiler break off, with the result being a siezed up engine with #1 piston cracked and the #1 wrist pin and piston welded together. I had driven my 1914 T speedster about 1/2 mile when the engine siezed. I'm now in the process of a complete engine tear-down for repairs and I'm using a new large funnel oiler plus an outside tube hogshead oiler. I try to console my misfortune by telling myself that the engine is over 100 years old, so occasional failures may be expected.
Me recommendation - when rebuilding a T engine, include replacing the oiler tubes.
I had one of the in the pan oil tubes which worked well until I installed a Scat crank and it hit the line.
Try the two funnel arraignment Lang sells that mounts between the oil pan and inspection cover. One on each side. Catches oil on the bottom side of the flywheel.. Seems to work well.
The right main bearing bolt doesn't seem to be seated ?????????? And who doesn't "turn over" an engine while assembling to verify interference with anything ??????