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Replacing PS Pump - Seal kit? #4532300
10/02/17 07:12 PM
10/02/17 07:12 PM
Joined: Jan 2014
Posts: 437
Australia
Spetz Offline OP
Spetz  Offline OP
Joined: Jan 2014
Posts: 437
Australia
Hi everyone,

I am replacing the power steering pump on my Mitsubishi 6A12 engine with a second hand unit.

Do I need any other parts during this process, for example a seal kit etc?

There is a small leak from one of the hoses that goes in or out of the pump (I don't know what hoses do what so can't say)


2003 Mitsubishi Diamante 6G74 3.5L. 5 Speed auto. 155,000 miles. Shell Helix Ultra 5W40 at 6k OCI
Re: Replacing PS Pump - Seal kit? [Re: Spetz] #4532309
10/02/17 07:19 PM
10/02/17 07:19 PM
Joined: Nov 2008
Posts: 3,157
Oshawa, Ontario Canada
JC1 Offline
JC1  Offline
Joined: Nov 2008
Posts: 3,157
Oshawa, Ontario Canada
Maybe you need to replace the o-rings? I never replaced seals when changing the P/S pump.


2015 Grand Caravan SXT Plus 5w-20 PPPP/Fram Ultra Filter
1997 Honda Civic CX 5w-30 Shell Conventional/Fram Ultra Filter
Re: Replacing PS Pump - Seal kit? [Re: Spetz] #4532316
10/02/17 07:23 PM
10/02/17 07:23 PM
Joined: Sep 2014
Posts: 1,420
Seattle-ish, WA
Oro_O Offline
Oro_O  Offline
Joined: Sep 2014
Posts: 1,420
Seattle-ish, WA
If the unit is indeed used and not rebuilt, I'd rebuild it before installing it. If it was rebuilt, the bearing and seals should be new. Replacement bearing and seal kits are not expensive.

In fact, why not rebuild yours instead of getting a 2nd one? It is a simple process.

Re: Replacing PS Pump - Seal kit? [Re: Spetz] #4532444
10/02/17 09:18 PM
10/02/17 09:18 PM
Joined: Jan 2014
Posts: 437
Australia
Spetz Offline OP
Spetz  Offline OP
Joined: Jan 2014
Posts: 437
Australia
I am not sure if mine has suffered any damage as it caused the belt to snap.

The replacement one is cheap so I rather start with that as a base just in case.

I've had a look at the OEM rebuild parts and they are pretty expensive so at this stage as that car is rarely used I am willing to have a second hand unit there which if it lasts even 5,000 miles I am happy.


2003 Mitsubishi Diamante 6G74 3.5L. 5 Speed auto. 155,000 miles. Shell Helix Ultra 5W40 at 6k OCI
Re: Replacing PS Pump - Seal kit? [Re: Spetz] #4532479
10/02/17 10:07 PM
10/02/17 10:07 PM
Joined: Sep 2014
Posts: 1,420
Seattle-ish, WA
Oro_O Offline
Oro_O  Offline
Joined: Sep 2014
Posts: 1,420
Seattle-ish, WA
I don't know about prices for you, but in the US you can get a decent seal kit delivered for under $15, and a bearing for $10 or less. I'd rebuild it for that small amount so you can be confident it will work reliably, and for a very long time. If your's seized and the pulley doesn't turn, then it is smart to get another base unit like you did.

Re: Replacing PS Pump - Seal kit? [Re: Spetz] #4532786
10/03/17 09:13 AM
10/03/17 09:13 AM
Joined: Jun 2014
Posts: 737
Northern Arizona
funflyer Offline
funflyer  Offline
Joined: Jun 2014
Posts: 737
Northern Arizona
Originally Posted By: Spetz
Hi everyone,

I am replacing the power steering pump on my Mitsubishi 6A12 engine with a second hand unit.

Do I need any other parts during this process, for example a seal kit etc?

There is a small leak from one of the hoses that goes in or out of the pump (I don't know what hoses do what so can't say)


I've rebuilt several power steering pumps, mostly Saginaw units, and every one had seals that were "set" (hard and flat). I agree with the others on here who recommend re-sealing your used pump before installing it. Very simple and inexpensive cheap insurance.


2016 Prius 1.8L
2001 Tacoma 2.4L
1966 GTO 6.5L
2015 Cub Cadet
Honda CT70 (X6)
Re: Replacing PS Pump - Seal kit? [Re: Spetz] #4532955
10/03/17 12:17 PM
10/03/17 12:17 PM
Joined: Jan 2004
Posts: 4,155
California
nthach Offline
nthach  Offline
Joined: Jan 2004
Posts: 4,155
California
If there's an O-ring or seal to be replaced, the new pump should include any o-rings/seals/washers for the inlet/outlet.

If you can get an aftermarket kit for cheap, I'd reseal the OEM pump as a CYA. I think someone in Australia can import parts from Japan, I know the Soarer guys have stuff sent over quite a bit. I've used a Plews/Gates kit with success in the past. I prefer OEM, and sometimes you can find a TransTec kit on eBay - TransTec is from an OEM supplier(Freudenberg-NOK).

Re: Replacing PS Pump - Seal kit? [Re: Spetz] #4532957
10/03/17 12:22 PM
10/03/17 12:22 PM
Joined: Jan 2004
Posts: 4,155
California
nthach Offline
nthach  Offline
Joined: Jan 2004
Posts: 4,155
California
Also, did you check the condition of the hose end fittings on the inlet and outlet lines? For most Japanese cars, a banjo fitting is on the high-pressure side and a bolt-on flange nipple is used on the feed line. The o-ring on the feed(inlet) does leak, and many Japanese pumps have a threaded fitting on the high-pressure outlet side that uses an o-ring to seal the fitting and pump junction in some cases.


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