Power steering pump noise.

[mudnut]

G'day all. i recently replace the 5/8" (16mm) hose from the steering fluid res to the back of the pump with 1/2" (12.5mm) hose because the owner of the shop reckons it is better to stretch a hose 1.5 mm to fit the 14mm barb, rather than try and squash the 16mm hose down.

Since I replaced the fluid with dextron III. I have noticed that the pump is whining.

my questions are: Is the 12.5 hose restricting flow to the pump?

Is the Dextron III incompatible with the system?

[nissannewby]

Dex 3 should be fine.

You are likely causing a restriction with the smaller line and causing cavitation (whine). Shouldnt ever down size a suction hose.

[mudnut]

That is what I thought, but wanted to be certain, thanks Matt.. Bugger, it will be the third time I've had to do the job!

[Bloodyaussie]

I have been having issues with my power steering at idle or when on tight tracks with it getting very difficult to turn... i have to stab the accelerator to get the revs up so i can turn the wheel..

Matty was driving my car the other night and says his does the same thing. .

[nissannewby]

What pulley do you have on yours aftet your conversion?

[Bloodyaussie]

What pulley do you have on yours aftet your conversion?

Its all td but mudski thinks its worn as i have to run smaller belts

[nissannewby]

Its all td but mudski thinks its worn as i have to run smaller belts

I believe the tb ones are smaller which may help of you want to give it a try. Its basically just a flow vs rpm thing

[mudski]

Your pulley has scolloped out Jonathan. Mine has too, but only slightly.
A smaller pulley as Mat said or the pump may need a new cartridge kit in it. I got them but they're not bloody cheap. I wonder if there is a way to test the pressure of the pumps. Assuming there would be...

[Bloodyaussie]

My idle is much lower than it was with the other engine. .. sits around 620rpm i think.... ?

[nissannewby]

Easy to test them with the right gear.

Td42 idle should be 750rpm