power steering pump? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

72'BBGMCSGCC · 06-07-2002, 12:50 PM

I've got the origional 402BB in my truck with the origional powersteering pump which is leaking.It's the kind with the separate reservoir on the left front inner fender and a hose goes from the reservoir to the pump.Where can I get a new pump or what do I need to do to fix the problem? I've already tried stop leak and it didn't work. Thanks everyone.

Big69C20 Toy · 06-07-2002, 01:04 PM

I've got the same problem with my 69, dang pump leaks, not so mcuh after stop leak but still a li'l bit and enuf to make my lower area engine coated. help fellas!

Dan72cst · 06-07-2002, 02:04 PM

I don't have a big block pump, but my small block pump was leaking on my blazer and I bought a rebuild kit from NAPA and rebiult it. Had the new bushing pressed in, but did the rest myself. Is this a possiblity for the big block pumps?

1-PU70 · 06-07-2002, 05:08 PM

I got one for my 72 402 for $57 at Autozone or Advance Auto. Cant remember.

Mike C · 06-07-2002, 10:08 PM

The pumps themselves are the same, only the reservoirs are different. Remove the whole thing, take the fitting off the back and the nuts holding the studs and remove the pump from the front. Replace all the o-rings and re-assemble.

**72BBGMC** · 06-08-2002, 06:50 PM

You need to check the solder joint around the nipple for the large reservoir hose on the pump. I've had a bunch of these pumps over the last few years and 8 out of 10 will leak there. Most of the time the joint will look good even though it leaks. You should remove the pump, plug all the line holes, fill with fluid and let it sit over night to find all the leaks.
Autozone has the pumps for $57 or seal kits for $10. Another thing to watch out for is when you are installing the large reservoir hose back on the pump not to push too hard against the nipple. This can break the solder joint. Put some PS fluid in and around the end of the hose to make it go on easier.

06-07-2002, 12:50 PM	#1
72'BBGMCSGCC Registered User Join Date: Nov 2001 Location: Fletcher,N.C U.S.A Posts: 162	power steering pump? I've got the origional 402BB in my truck with the origional powersteering pump which is leaking.It's the kind with the separate reservoir on the left front inner fender and a hose goes from the reservoir to the pump.Where can I get a new pump or what do I need to do to fix the problem? I've already tried stop leak and it didn't work. Thanks everyone.

06-07-2002, 01:04 PM	#2
Big69C20 Toy Livin' it up. Join Date: Nov 2001 Location: Richland, MI Posts: 2,212	I've got the same problem with my 69, dang pump leaks, not so mcuh after stop leak but still a li'l bit and enuf to make my lower area engine coated. help fellas! __________________ -Greg; Sold the 69 C20. It's off to a better home with more love! Now onto the 86 CUCV M1009; K5 blazer with 6.2L diesel, corp 10 bolt axles, Detroit locker in the rear, trutrac front, 3.73 gears, 35" tires.

06-07-2002, 02:04 PM	#3
Dan72cst Registered User Join Date: Feb 2001 Location: Lake Stevens,WA 98258 North of Seattle Posts: 833	I don't have a big block pump, but my small block pump was leaking on my blazer and I bought a rebuild kit from NAPA and rebiult it. Had the new bushing pressed in, but did the rest myself. Is this a possiblity for the big block pumps? __________________ Marysville, WA (Dan72cst@hotmail.com) 72 4wd Blazer CST 350/350 72 4wd Chevy LWB 350/350 68 2wd Chevy LWB 327/400

06-07-2002, 05:08 PM	#4
1-PU70 Registered User Join Date: Apr 2000 Location: Bradenton, FL Posts: 1,036	I got one for my 72 402 for $57 at Autozone or Advance Auto. Cant remember. __________________ 1970 CST/10 402,700R4,3:73 posi,AC,PS,PB,TLT,PW,Buckets with heaters

06-07-2002, 10:08 PM	#5
Mike C Registered User Join Date: Dec 1999 Location: Austin, TX, USA Posts: 7,727	The pumps themselves are the same, only the reservoirs are different. Remove the whole thing, take the fitting off the back and the nuts holding the studs and remove the pump from the front. Replace all the o-rings and re-assemble. __________________ 44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax

06-08-2002, 06:50 PM	#6
72BBGMC Senior Member Join Date: Jun 2000 Location: georgia Posts: 292	leaking pump You need to check the solder joint around the nipple for the large reservoir hose on the pump. I've had a bunch of these pumps over the last few years and 8 out of 10 will leak there. Most of the time the joint will look good even though it leaks. You should remove the pump, plug all the line holes, fill with fluid and let it sit over night to find all the leaks. Autozone has the pumps for $57 or seal kits for $10. Another thing to watch out for is when you are installing the large reservoir hose back on the pump not to push too hard against the nipple. This can break the solder joint. Put some PS fluid in and around the end of the hose to make it go on easier.

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