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Well I got my 216 put back together, that pass thru oil tube is quite that pain the first time you do it, fixed some oil leaks and checked out the cyl bores while I had the head off, not to bad.......but I'm still thinking of up grading to a 235 full pressure engine. a friend offered me a 235 but not sure what year it is, Am I looking for a certain year for normal rod bearings and fully pressurized engine oil system ?

The 235 engine with full pressure oiling that swaps into the place of a 216 with the least amount of monkey motion is a 1954 or early 55 item. Late 55 to 62 engines have a lower water pump location and they require an adapter plate to use the 216 water pump and position the fan correctly. That's a simple conversion, so don't reject a freebie because it has the low water pump.

1941-53 truck 235's are just overgrown 216's with a taller engine block- - - -spray-oiler rods and all. There's a 1950-53 235 car engine with hydraulic lifters that's an oddball variant used in cars with Powerglide transmissions, also a spray-oiler.
Jerry

And just to muddy the waters, 53 235s were a new design with 18 head bolts instead of 15 in the older engines - and they came in two flavors: full pressure oiling (Powerglide) and Babbitted spray-oiler rods (truck and manual trans cars).

Woof', In addition to the good info from Jerry, there is one more desirable full pressure 235 with the high, older-style water pump location, which was used in '53 Powerglide cars - the first vehicles to get the full pressure 235s. They look like the low pressure 235s, including two-stud valve cover mounting, but can be ID'ed by the stamped engine serial number on the machined pad just aft of the distributor, or by the block casting number. Prefix letters on the stamped engine serial number will be LAQ or LAS, and the casting number is 3701481 (located low and forward of the distributor, near the motor mount and fuel pump, so may be difficult to see), for the '53 full pressure engine.

If you post the numbers from your friend's 235, this group can ID and date it for you.

Doug

What does "full" pressure mean?

High Pressure compared to the older Low Pressure engines?

"Full pressure" usually refers to the engine having a drilled crankshaft, which pressurizes the rod bearings, instead of having Babbit bearings molded into the rods, spray nozzles, and a solid crankshaft with no oil passages. The rods are still technically "pressure-lubricated" by the dippers hitting the oil streams, but it's done externally. A bent spray nozzle will cause a rod bearing to burn at speeds above idle.
Jerry

Yes, Jerry, thank you for your excellent and concise description of what what most people call "Full Pressure"; but, in earlier non-high pressure GM documentation, the oil lubrication system was also called Full Pressure.

That can confuse people who look through GM documentation.
I will continue to use the differentiating terms of low-pressure and high-pressure.

My pedantry also shows regarding which GM engines were "splash oil" engines.
Some components of high-pressure 235s/261s were still "splash/slosh oil'.

QUIZ QUESTION: which parts in 1954 Chevrolet Trucks were still splash-oil lubricated?
Hint: check the 1954 Truck Shop Manual's section on Engine Lubrication.

I'd suggest the purchase of a big, high-quality magnifying glass. It makes the nits a lot easier to see. If you're out in the sunlight, you can also burn 'em to death!
Jerry

There is a tiny hole in the connecting rod which supplies a splash of oil to lubricate the cylinder walls.

Tim will know what I am talking about but when I read about the "nits", A flash came into my mind where Warren Foster (wdoftexas) was telling someone he thought they were "trying to separate the fly [censored] from the pepper".

ThankYou, Carl

Does that make it a splash oil engine?

Or, is that too small a nit?

Where does the “splashing“ take place in a 1953 235?

Here a good example of a splash oil lubrication system.

Is this spray oiler/oiling a splash oil system?

Thanks for the info Guys, I am so far behind when It comes to this old stuff, Babbit bearing's were a nice surprise as was the oil tube behind the lifter cover