Hey quick question, Difference between big block and small block power steering pump
ABC123 said
December 15th
Looks like when my repaired arm let the AC pump fall, it damaged the power steering pump reservoir.
I have the other 427 pump and my spare 350 pump.
To buy a replacement they list small block and big blocks separate.
Other than the brackets, I can't tell the difference.
What is the difference?
Thanks in advance !
seventy2plus2 said
December 15th
For 1970 ( and I presume the same for 1969) the difference is where the return line attaches.
On the small block it goes into the back of the reservoir, whereas on the big blocks it goes into the side of the reservoir.
I'm guessing you broke off the return line.
ABC123 said
December 15th
Thanks
I'm in a power outage right now, I will check in the morning.
It is possible that the 2+2 427 car was using a small block pump switched sometime in the past.
I hope the shaft length is the same between AC and non-AC cars.
I plan to pull the pump Saturday to see where the leak is.
It is funny with the former broken arm, just a little wrong twist and you lose all strength
4SPEED427 said
December 15th
From what I see the only two V8 pumps for 1969 are small or big block, A/C shouldn't matter.
65 SD L79 said
December 15th
a little derail guys or sorta. I got a lesson on small and big block steering column shafts and rag joints for a bodys. Are they also different on B body cars?
seventy2plus2 said
December 15th
I think a/c might have the 2 groove power steering pump pulley, other than that no difference between a/c & non a/c.
69 & 70 pumps are different, the sex of the pressure hose is different between the two years.
seventy2plus2 said
December 15th
65 SD L79 wrote:
a little derail guys or sorta. I got a lesson on small and big block steering column shafts and rag joints for a bodys. Are they also different on B body cars?
No difference re shafts & rag joints on b-body cars.
4SPEED427 said
December 15th
65 SD L79 wrote:
a little derail guys or sorta. I got a lesson on small and big block steering column shafts and rag joints for a bodys. Are they also different on B body cars?
Just the A body due to clearance issues that B body doesn't have.
65 SD L79 said
December 15th
4SPEED427 wrote:
65 SD L79 wrote:
a little derail guys or sorta. I got a lesson on small and big block steering column shafts and rag joints for a bodys. Are they also different on B body cars?
Just the A body due to clearance issues that B body doesn't have.
thanx Carl
ABC123 said
December 16th
Ok, halfway mark, Toast, coffee and CP.
Found a wing nut from days gone by
My 350 pump,
and the other big block one,
Looks like I wharped the reservoir, where it meets the pump.
Looks like when my repaired arm let the AC pump fall, it damaged the power steering pump reservoir.
I have the other 427 pump and my spare 350 pump.
To buy a replacement they list small block and big blocks separate.
Other than the brackets, I can't tell the difference.
What is the difference?
Thanks in advance !
On the small block it goes into the back of the reservoir, whereas on the big blocks it goes into the side of the reservoir.
I'm guessing you broke off the return line.
Thanks
I'm in a power outage right now, I will check in the morning.
It is possible that the 2+2 427 car was using a small block pump switched sometime in the past.
I hope the shaft length is the same between AC and non-AC cars.
I plan to pull the pump Saturday to see where the leak is.
It is funny with the former broken arm, just a little wrong twist and you lose all strength
From what I see the only two V8 pumps for 1969 are small or big block, A/C shouldn't matter.
a little derail guys or sorta. I got a lesson on small and big block steering column shafts and rag joints for a bodys. Are they also different on B body cars?
69 & 70 pumps are different, the sex of the pressure hose is different between the two years.
No difference re shafts & rag joints on b-body cars.
Just the A body due to clearance issues that B body doesn't have.
thanx Carl
Ok, halfway mark, Toast, coffee and CP.
Found a wing nut from days gone by
My 350 pump,
and the other big block one,
Looks like I wharped the reservoir, where it meets the pump.
The bearing has some play in it as well.
Live and learn.
The Oct 68 pump has a female fitting.
The March 69 pump is male.
We have a really good pump rebuilder in London, Ontario.
I am going to pop in there, Monday, after work.
So I need a case with a male fitting.
Yes, I have been looking at this one.
1968-1969 CHEVROLET FULL SIZE CHEVROLET Remanufactured Power Steering Pump With Reservoir by BBB INDUSTRIES - 732-2132 (partsavatar.ca)
Here's the original design:
Having a couple cars it'd be good to have a spare.
-- Edited by seventy2plus2 on Saturday 16th of December 2023 01:26:31 PM