how to use 1jz hydro. water pump for power steering

[1jzracing]

this is how to modify the hudraulic pump which runs the radiator fan as comonly found on the front of most 1jz water pumps to run your power steering, i have done this over 3 years ago and is still working perfectly, you must do it where i

the pumps are the same type and generic pressure but the fan pump is set to have more flow rate. Both pumps have a built in controll valve that keeps the flow and pressure constant no matter what the engine revs are, so by reducing the outlet hole size from the shuttle valve the flow is reduced without loading up the pump or overheating the oil

check the pics the numbers coraspond to the instructions below

1. take off the banjo bolt and outlet hose

2. take off the big bolt at the bottom remove the shuttle and spring

3. this is the hole at the bottom of the outlet thread which needs to be reduced, drill it out and tap it m8

4. screw a very short countersunk m8 cap screw in the new thread with a 3mm hole drilled down the center, you may need to grind down the head a little, like the picture, to fit it down the hole, make sure it doesnt poke through the inside too much and you may need to fit the shuttle and spring before screwing it all the way in, do it up TIGHT!

put it all back together

note: you CAN NOT restrict the flow at any other place such as the end of the banjo bolt this WILL NOT WORK!!! even though it looks to do the same thing. There is a tiny oil gallery about 0.5mm diameter off to the side at the bottom of the outlet hole this controlls the shuttle valve and the restriction must be BEFORE this gallery

If your game to experiment you may find easier ways of reducing the hole such as driving in a little short tension pin or something

[wilbo666]

Awesome

Cheers
Wilbo

[chris davey]

You must spread some Reputation around before giving it to 1jzracing again.


You are a pioneer!

(and I don't even have a hydro pump or power steering )

[wilbo666]

You must spread some Reputation around before giving it to 1jzracing again.


You are a pioneer!

Yep same boat my friend

Cheers
Wilbo

[sheepers]

thanks heaps. i have issues with fitting the belt required to run the standard pump, this will fix a few probs and i dont have to bolt an extra bit on my motor.
cheers,
sheepers.

[sheepers]

double extra arse!!!!
i dont have a hydro water pump!!!
can you run power steering with water????

[camrygt?]

I wired a car that was setup like this on the weekend but instead of modifing the pump I used a jaycar motor speed control kit on the solenoid. Changed a capacitor in it to drop the frequency to about 100hz and all was good.

Just wound it up until the steering felt good. For anyone that had too much spare time it could be made speed sensive as well.

[1jzracing]

cool!

now thats a cunning idea

You might find that the flow is still a little much.

Flow and pressure are two verry different things, the power steering only calls apon pressure as its needed - ie the more effort on the steering shaft the more oil is directed to the piston building relitive pressure instead of recirculating back to the reservoir.

if the flow is too high there can be too much over all pressure in the system as the oil cant pass through the valving servo fast enough, my car popped the seal out of the steering rack at the steering shaft when i hooked it up without the restrictor

the solenoid controller on the hydraulic fan pump may only controll the pressure not the flow - I could be very wrong not sure how it works, if it does controll flow then its perfect!

let us all know how reliably this works, could be a much easier solution

[camrygt?]

yeah I wouldn't have a clue, it worked perfectly for the 10 min test drive.

As I wound up the speed controller I could here the fluid noise begin like normal power steering does as the air etc gets out of it.

I'm sure i'll hear about it if anything explodes in the future

[TheStitt]

what drives this pump on the enigine?? Can I get a pic of pump installed

Would it be fesable to get onto a 7M as I don't have room for the P/S on my car.

[wilbo666]

what drives this pump on the engine?? Can I get a pic of pump installed

Would it be feasible to get onto a 7M as I don't have room for the P/S on my car.

Serpentine belt.

I doubt it would fit on a 7m, it would be like asking the water pump to be interchangeable...


(stolen image!)

Cheers
Wilbo

[TheStitt]

Ah ok cool

I just have issues with room in the bay,

are there electric pumps avaliable

[cambelt]

Sw20 mr 2 is electric i think .also is the impeller on the hydro pump secured with a nut , ie you can disasemble the water pump easyly.
Dave

[1jzracing]

few people have asked so ive reposted the pics,

sorry didnd realise id pulled them off

[CrUZida]

Whats the feasibility of the hydro pump being used to pump coolant?