The Stovebolt Site Forums The Shop Area Engine Shop Jim Carter short shaft 235 water pump question

We're swapping a 55' 235 into our 49' 3600.

After having pump clearance issues, we picked up a shortened pump from Jim Carter. When we install the fan from the old 216, it contacts the balancer of the 235.

Does anyone have experience with this? We could space the fan but are concerned with radiator fitment. Its really tight.

Here is one of the many posts on the subject. You might want to switch to an adapter with the old style pump. waterpump solutions

thanks sir. I'll read through now.

I gave that post a whirl. It mostly discusses pulley sizes related to belt size and coolant flow.

The Jim Carter pump is designed to resolve clearance issues. Its pulley size related to belt width matches the 235 balancer.

My thoughts on the adapter plate, it will contribute to our clearance issues by adding material to join the 2 mismatched components

I shimmed the 216 fan with some washers on the inside. Most of the fan blades barely clear the balancer now. I'll try a spacer between the pump and fan. Hopefully the fan wont interfere with the radiator.

We were hoping the pump would resolve all these clearance issues.

What part of Washington are you in?
BTW, the adapter does not move the water pump out of stock position.

I had the same problem with a later 235 in my '50 COE. Contact Patrick's in Casa Grande, AZ. They have spacers the correct thickness for just this purpose. Unlike other vendors, they make and sell the spacer, along with their short shaft pump. As I recall, the spacer is less than 1/2 inch and the spacers you get at most auto parts places are 1/2 inch and larger increments. One half inch sets the fan too close to the radiator.
Kent

Thanks Dave, but we already have the modified pump painted and installed. No turning back now!

We're in old Snoqualmie

We'll keep them in mind. At this point I think we'll try to fab up a spacer and see where we end up.

Thanks sir!

On one of my trucks, I installed a Ford fan blade that I got at the junkyard that is just a little bit shorter and clears the harmonic balancer. I know it's heresy to use a Ford part but it works fine. Just another way to approach it. My other trucks use the fan spacer approach. 235's in all of them.

I installed a 235 in my 48 chevy fleetline and it took a 3/4 inch fan spacer from Speedway motors and a 4 blade 17 inch fan from a 55 chevy car to make it work out. The only other problem is I bought the pump from chevy of the 40's and the pulley is out of round, They have sent me 2 others and they too are out of round. As much as .060. Any one know where i can find a round pulley?
thanks
Cruiseinbob

What good timing.
I just bought a 65 1-ton that runs and stops.
Guess I did not look it over good enough.
Got it home on a trailer and then started really checking it out.
No fan blade on the 235.
Belt and pulley there, but no blade.
I didn't give much for it, but, who would do something like that?
I'll be looking for a fan and spacer soon.
Pics.
http://s893.photobucket.com/user/2-Ton/library/1965%20one%20Ton

Thanks
Don

Don- - - -that 3-sheave crankshaft pulley looks like you've got a 292. Wanna trade for a good 235? I'll even throw in a fan blade!
Jerry

Jerry
I also thought that it was not a 235.
I'll get the engine numbers tomorrow and find out.
The guy I bought it from said it was a 235 rebuilt with less than 10,000 miles.
I have my doubts about that also, but it does sound solid and needs a tune up.
I'll have it at the Homecoming, unless I sell it first.
If it is a 292, the price will slightly raise.

Don

Back on topic.
Jerry, do you remember how thick the fan extension needs to be to clear the three sheave pulley?

Don

Not really- - - -but I know a machinist or three who can shorten one if it's too long! Basically, just get the fan blade within about 1" or less of the radiator core, or put a shroud on it that overlaps 1/2 of the pitch of the fan. Don't enclose it all the way.

A 235 has a single piece pushrod cover. Yours has two. If the pushrod cover is close to 6" tall, and the motor mounts are offset instead of straight across from each other, it's definitely a 292. 230/250 engines have two pushrod covers but they're much shorter. Good find!
Jerry

Darn it Jerry.
I wish I knew a Machinist in my area.
I'll do more research tomorrow and check a couple old cars out in the woods also for a fan.
Would a long nose water pump work?
I would rather just get a spacer though.

Thanks
Don

2 ton , looking at the push rod cover on the side of the engine, it's not a 235. Looks like a third generation Chevrolet six cylinder engine to me.

The quickest, least expensive solution is a spacer. Your local big box parts store has probably got a universal fit flex fan and spacer that will put you in business quickly for just a little pocket change, if you don't find something from the boneyard.
Jerry

Carter sells a fan meant for that short shaft pump. I think they call it a flat back fan. Mine fit just fine.

Good timing as I will be making this change too.

Ok
It's been a cold windy day and I didn't get much done today.
The motor number is M020T3SA.
Vin is PF34708.
I've done a little searching and have not came up with what engine it may be.
Motor mounts are slightly offset and the two push rod covers are six inches tall.

Now.
Back on topic.
I think I'll check out Carters and our local NAPA and see what I can find out, about getting a fan.
I'll also post in the "Tons'O Fun" threads to try and get an ID on the motor.

Thanks
Don

292's are the only ones with 6" pushrod covers. Good catch!
Jerry

Thanks Jerry.
The prison Preacher, I bought it from, said it was a 235.
Guess the sell price just went up.
After I get a fan on it.

Thanks
Don

Update.
It has warmed up some here in the Midwest and I went and pulled a clutch fan off a 84 F-250 I retired.
Was checking out the fit and it looked like it would work.

Here is the dumb part.
I was checking out the radiator and there is an electric fan on the front side of the radiator.

If, the powers that be, want to exile me from this honored group.
I will understand and withdraw, never to show my typing here again.

Thanks
Don King

The electric fan is a poor substitute for an engine-driven one. Pulling hard with a heavy load at high RPM in the lower gears when the fan is needed the most is when the constant-flow electric is likely to come up short. I'd suggest replacing it with a proper mechanical fan.
Jerry

Thanks Jerry.
No exile papers have been issued yet, so I'll hang around until they are.
I think I'll go that route of a mechanical fan.
The old Ferd clutch fan looks like it will work.
Is there any reason I should remove the electric fan?
It does not look like it would impede much air flow and could serve as a backup.

Don

As long as the electric fan doesn't deflect the normal airflow, go ahead and leave it on there. I'd suggest shimming it forward an inch or two just to be sure the blades won't act like an air deflector.
Jerry

Thanks again Jerry.
This truck will not see any hot city stop lights as long as I own it.
Haul a load a wood a few times in the winter at the most.
I should have it at the Homecoming and you can advise me there.
It could use a Sweet tune up.
It has new plug wires, but they are way too long.
Actually hope it has a one way ticket to the event.

Don

Don, Don, Don...
No exile papers forthcoming for you.
In fact, a big thank you from me.
I feel so much better about myself after discovering that I indeed am not as close to being put in that home where all of my older friends now live, as you are.
Schadenfreude pretty much sums it up for me.
Just for the record, I have done dumber things than what you did already today. I just don't share.
Carl