Hey fellars, I have a '51 3100 p/u and a freshly rebuilt later model 235 block and head only that were given to me.(cast number is 1961 full pressure) my problem is I have the original 216 and 2 older 235s that have been very helpful with spare parts. However I need a oil pump and filter system setup. I'm pretty sure i need a oil pump (m-45) its shorter and the holes are different than the other 3 pumps i have. (that are all the same) I would like an external remote filter mount and spin on filter. Is it that simple for the full pressure 235 that I have? I'm drowning in spare parst that are making me confused about the oil system. The 216 is a splash type and the older 235s are only partial pressure? I Just what to make sure that I have the right oil system and pressure when i fire up. Thanks for all your help, mike
If the older 235s do NOT have dippers on the rod caps and no oil troughs like the 216 then they are full pressure engines and the OPs would be the same. The '61 engine is full pressure alright but is NOT setup for full flow oiling ,still designed to work with a byp*** style filter. You can run a remote spin on filter but you MUST still use the .062 restrictor fitting in the supply line. Full flow systems require internal engine mods.
Thanks for your reply, I can verfiy that the 2 older 235s (1954) do not have the dippers like the 216. I'm understanding from you that the later 235 and the older 235 utilize the same system? I don't think i want to do the engine mod. (you mean drilling the block right?) what is the limitation if i'm not setup for full flow oiling?
what no i need to move forward? can i use the same oil pump from the older 235 then? and the older type oil filter that is on the older 235 can be used on the newer?
All 54-62 235 are the same except for the water pump mounting and motor mount styles and locations. You can get a adapter to used the earlier style WP on the later block which in your case would be a good idea to get your fan properly located. The byp*** OF was used from the 30s to the last of the 235s in 62. Yes use the 54 OP. There were a few internal detail differences over the years but for what you are working with will not be a issue. Need to check and see if your new engine is hydraulic or solid lifters, P*** car engines were hyd and trucks were solid till the end.
Do yourself a favor and check out two other web sites. Stovebolt.com and inliners international .com. all they deal with are 6 cylinder stovebolt motors.
A '54 oil pump is going to be too long to work on a '61 235. You will need the M-45 pump which you should be able to get at most any parts house. As far as the byp*** filters go, any of the spare ones you have should work as long as they aren't aftermarket (they will need the restrictor as was mentioned above but the OEM style filters will have it built in). Just FYI, you don't actually need a filter, it was an added cost option for many years. I've owned quite a few 216's and 235's and none of them had one. The '54 235 in my truck that I have now doesn't have one either. You will loose a little oil pressure by running the filter as it syphons off a portion of the oil the pump puts out. I'm not saying they're not a good idea, just not necessary IMHO. I don't know why you would need to know if you have hydraulics or not (until they need to be adjusted), it really doesn't relate to your question. But just for the record, hydraulic lifters were used in all the Powerglide equipped cars from 1950 thru 1955. Then starting in 1956 all the cars came with them. All the truck 235's and 261's ran solids. There are several other differences in the 235's between '54 and '62 as well, including a couple of different oil pans, which is why we can't just swap oil pumps at will. Hope that helps,
waldo53, thanks for the info. I will do as recommended. the parts house offers the m-45. what type of p/u screen will I need? they dont offer any info and all I have is the older type that bolt to the crank bearing cap. Aslo I dont have an oil pan for the '61 235. I have many of the others which makes me wonder why it not possible to use the 54 oil pan and 54 oil pump with a small p/u screen? not second guesing just learning. Is the pump volume different?
1. 56-62 pans are different. You can see the difference at the bottom of this page: http://pugetsoundvintagechevrolet.org/Programs/6 cylinder engines with photos.pdf 2. Oil pressure is determined by clearances inside the pump. A new, tight one is cheap insurance. 3. Drilling & tapping a stovebolt block to permit using a POS filter is a bad idea IMO (see Fram oil filter thread). Use a high performance byp*** filter if anything.
As you can see, you'll need a '56-'62 pan for your '61 block. Also need the later style pickup tube and screen that hangs off the pump itself (not bolted to the block). I don't know of any source for a new tube/screen but a used one shouldn't be too hard to find. They pop up on e-bay from time to time, you could check your local wrecking yards, or give Patrick's a call at 520-836-1117, or Tom Langdon at 586-739-9601. These guys work on these motors on a daily basis. They might have one laying around they want to get rid of. Good luck.
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