The Stovebolt Site Forums The Shop Area Engine Shop correct 235 waterpump upgrade modification

I have a 1948 1 ton chevolet pick up I pulled the original engine and am now in the process of installing a 1954 rebuilt 235 I need to find out how to install a water pump so that it lines up in the center of the radiator and will use the same 1954 crank pulley with the thinner 3/8 fan belt any suggestions Thank You Tim

If you truly have a 1954 engine, there is nothing to do. A 1954 engine is setup that way stock. It is the 1955-62 engine where the problem occurs.

just wondering what is different with the 54 that would make it no mod. needed to install in 47-53 stovebolts,

A '54 engine was installed in an AD truck from the factory. It's made to fit.

The block was changed and the water pump is different on a '55 2nd series and on.

The 54 water pump mounted differently and also had a short shaft. The later 235's had a water pump with a longer shaft and also mounted on the engine differently. The 54 235's were the engine that came in the 54's and were designed for it. The later 235's had minor differences, including the water pump and the way it mounts.
Samantha

sorry I meant to say it is a 1955 235 engine I found the steel adapter plate for raising the pump the one where you drill the block but dont know what short shaft pump with a 3/8 pulley to give it proper fan speed i NEED

You need a 1953-54 pump. It uses the 3/8" pulley and belt.

I think you need to use a 216 water pump with the adapter plate. A 216 pump has an internal impeller and sits flush on the adapter plate. Later pumps had an external impeller on the rear of the pump that fit in an opening in the front of the block and won't mount on the adapter plate.

The water pump for a 1954 235 has an internal impeller and will work. The later 235's had the external impeller.
Samantha

Man, where have you guys been? PLEASE, call and get a short water pump from us at Patricks! The '55 engine requires the larger diameter pulley to slow the water down! Also, use the '235 fan PLEASE NOT the '216 fan or it will SPIN 190 PERCENT of its capacity! Also, use a 180 degree thermostat and a 4 to 7 pound radiator cap.Also not a bad idea to install an overflow jug or upgrade to 4row desert cooler radiator.Many 6 cylinder websites have reprinted our swap article as to how to do this swap easily.The water pump we sell is a brand new, specially designed short shaft and shallow pulley to clear the radiator.

The question was answered....several times for the 54 engine. Nothing extra needed but the 54 pump.

Was curious AZR....for the 55-62 235 block.....does the "short shaft" relocate the pump so that an aftermarket fan will clear the harmonic balancer and center it on the radiator? Secondly, if I should have a waterpump failure, would I have to sit beside the road until UPS delivered a new "custom" pump from AZ?

I've got a pricey new short-shaft pump collecting dust in the shop and after finding it didn't address all the above questions. I went with the adaptor plate and the 216/235 pump. In the 18 months of daily driving my engine temp has rarely exceeded 180 (even with the A/C), my 6 blade fan is centered on the radiator and clears all pulley's and NAPA can hand me a replacement pump over the counter.

I can appreciate your zeal in extolling the product, but also suggest you realize that there is usually more than one solution to a problem. On this site we share information based on actual performance and not so much on supposition. If you're running a "short shaft" pump on your 55-62 engine and you're happy with it that's great! Another satisfied Patricks customer!

Dave