235ci or 261ci

Miner Matt · Post by **Miner Matt** » Thu Jan 04, 2007 2:15 pm

How do I tell if a engine is a 261 or a 235 without taking it apart??

dr deuce · Post by **dr deuce** » Thu Jan 04, 2007 6:08 pm

The 261 (US) has two large fittings on the drivers side that connect to hoses like for power steering in a 60's car. These go to the oil filter hung on the intake manifold.

On a 261, ALL the oil from the pump passes out of the engine block and thru this filter before re-entering the engine. It is a full flow oil filter system like a modern engine.

You can buy a remove oil filter mount/bracket that will accept a spin on modern filter and mount it low in the chassis.

John V Cliche · Post by **John V Cliche** » Fri Jan 05, 2007 7:56 pm

Hey Doc
What about the lifter pan cover and the oil regulator ,is there a spotting difference there as well ?

Thanks
John

dr deuce · Post by **dr deuce** » Fri Jan 05, 2007 9:02 pm

I don't think so.

The really BIG oil hoses give it away. The block where they come out is slightly different.

If you ever find one of these engines and it is salvagable, BUY it! They are hard to come by.

Miner Matt · Post by **Miner Matt** » Tue Jan 09, 2007 11:00 pm

I found another differance. On the 261 there are three casting lines on the block were starer bolts up!!!

Later,Matt

daveyboy · Post by **daveyboy** » Mon Nov 26, 2007 5:09 pm

or you can go by the casting numbers.

the one I bought has a casting number of 3836340, date code of C 5 5. making it a 1955 motor.