How to mount 1983 (O-ring style) PS pump on 1975 K10

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

Useful

Junior Member
Joined
Sep 1, 2024
Posts
4
Reaction score
3
Location
Fayetteville GA
First Name
Paul
Truck Year
1975
Truck Model
K10
Engine Size
350
I put a Borgeson steering gear and crossover steering in my ‘75 K10 but the fittings kept leaking. So I bought a 1983 version PS pump w O ring fitting because I heard they seal better.

The problem is that the pump is clocked just a little different such that my PS reservoir interferes with the Waterpump and won’t allow me to tighten the belt. Any ideas for a solution?
You must be registered for see images attach
 

1lejohn

Full Access Member
Joined
May 14, 2012
Posts
325
Reaction score
747
Location
texas
First Name
john
Truck Year
1985 , 2004
Truck Model
k-1500, 2500 HD
Engine Size
350, 6.7
With out pictures I would only be guessing. Drill some new holes in the bracket? Are you using the new pump bracket, or the old pump bracket?
 

Useful

Junior Member
Joined
Sep 1, 2024
Posts
4
Reaction score
3
Location
Fayetteville GA
First Name
Paul
Truck Year
1975
Truck Model
K10
Engine Size
350
I’m using to old bracket and it won’t let me pull it to the left enough to tighten the belt-or even get the second bolt installed.
 

Attachments

  • IMG_5795.jpeg
    IMG_5795.jpeg
    135.2 KB · Views: 29
  • IMG_5794.jpeg
    IMG_5794.jpeg
    139.7 KB · Views: 29

Robert Bare

Full Access Member
Joined
Sep 13, 2020
Posts
107
Reaction score
162
Location
MT
First Name
Robert
Truck Year
1978
Truck Model
k20
Engine Size
5.7
Which "fittings" kept leaking?
 

Old Guy Bill

Full Access Member
Joined
Sep 10, 2023
Posts
427
Reaction score
1,321
Location
KY
First Name
Bill
Truck Year
1978
Truck Model
K20
Engine Size
400
Get a longer belt…
 

nvrenuf

Full Access Member
Joined
Jul 30, 2010
Posts
1,940
Reaction score
2,424
Location
Mobile, Al.
First Name
John
Truck Year
1991
Truck Model
K5
Engine Size
454
I know they make adapter fittings to go from flared pumps to o-ring fittings but I'm not sure about the other way.
 

Ricko1966

Full Access Member
Joined
Apr 11, 2017
Posts
5,392
Reaction score
8,605
Location
kansas
First Name
Rick
Truck Year
1975
Truck Model
c20
Engine Size
350
I put a Borgeson steering gear and crossover steering in my ‘75 K10 but the fittings kept leaking. So I bought a 1983 version PS pump w O ring fitting because I heard they seal better.

The problem is that the pump is clocked just a little different such that my PS reservoir interferes with the Waterpump and won’t allow me to tighten the belt. Any ideas for a solution?
You must be registered for see images attach
Put your newer fitting in your old pump,they unscrew out of the pump. Then you can have old pump new Oring. lines
 
Last edited:

Turbo4whl

Supporting Member
Supporting Member
Joined
Oct 30, 2019
Posts
3,120
Reaction score
7,242
Location
Downingtown, PA
First Name
Wayne
Truck Year
1974
Truck Model
Jimmy
Engine Size
350
So unless the SAE tube flare is damaged, you should be able to get it to seal. GM used them for years. That being said, you could mount your old pump. Swap out the relief valve from the '83 pump into the '75. Now you will need the correct pressure hose with the 'O' type fitting on the pump connection.
 

Useful

Junior Member
Joined
Sep 1, 2024
Posts
4
Reaction score
3
Location
Fayetteville GA
First Name
Paul
Truck Year
1975
Truck Model
K10
Engine Size
350
Ok, man that’s pretty simple. Thanks!
I was going to swap the reservoir to the new pump but that sounds a lot easier.
 

AuroraGirl

Full Access Member
Joined
Sep 8, 2019
Posts
9,693
Reaction score
6,867
Location
Northern Wisconsin
First Name
Taylor
Truck Year
1978, 1980
Truck Model
K10, K25
Engine Size
400(?), 350
I’m using to old bracket and it won’t let me pull it to the left enough to tighten the belt-or even get the second bolt installed.
Where did you get that ps cap?
Ok, man that’s pretty simple. Thanks!
I was going to swap the reservoir to the new pump but that sounds a lot easier.
The reservoir wont change the fitting or what lines go into it, the pump itself has those. If you want your nice new pump body and cap on your old pump, go ahead. Just get new o ring incase the o ring is damage removing the reservoir.
 

Useful

Junior Member
Joined
Sep 1, 2024
Posts
4
Reaction score
3
Location
Fayetteville GA
First Name
Paul
Truck Year
1975
Truck Model
K10
Engine Size
350
It was just a pump off Amazon-modulus power steering pump. Will get O ring. Thanks for the help!
 

AuroraGirl

Full Access Member
Joined
Sep 8, 2019
Posts
9,693
Reaction score
6,867
Location
Northern Wisconsin
First Name
Taylor
Truck Year
1978, 1980
Truck Model
K10, K25
Engine Size
400(?), 350
It was just a pump off Amazon-modulus power steering pump. Will get O ring. Thanks for the help!
Confirm the vent in the cap works by blowing into the stem at the center at the bottom, if you can bleed air slowly through it this way, its a good cap
 

ali_c20

Full Access Member
Joined
Sep 20, 2016
Posts
1,291
Reaction score
1,840
Location
Austria
First Name
Alexander
Truck Year
1974, 1979
Truck Model
C20, K5
Engine Size
350, 350
Welcome from Austria. Nice truck, hopefully without leak soon.
 

Mr Clean

Super Moderator
Staff member
Super Moderator
Joined
Aug 18, 2010
Posts
10,310
Reaction score
10,137
Location
North East Texas
First Name
Shawn
Truck Year
1982 & 1985
Truck Model
K10 Extra Cab w/ Proper SWB, & 85 K5 Blazer
Engine Size
454 BBC, & 383 Stroker
:welcome:
 

Latest posts

Forum statistics

Threads
44,103
Posts
949,404
Members
36,203
Latest member
Rolf
Top