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

[dom14]

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?

I'm guessing you replaced the hose 'cos it was leaking at the joint between barb and hose?
I had that issue. When I removed the hose to have a close look at it, it looked fine. I applied some silicon to the barb and
put the hose back in and tightened the hose clip properly.
It has never leaked since then. Before that, it was leaking for ages.

BTW, original hose comes with a heat shield around it 'cos the power steering hose from reservoir to the pump is way too close
to the exhaust. Make sure to wrap some heat shield around the new hose.

I use power steering fluid. I reckon it's the same as Dex III.

[mudnut]

The hose has gone brittle and cracked, so I cant cut it back and re-clamp it. I went into town, to get some 5/8, but they can't seem to get it. I hope the new hose can withstand suction too. Now I am stranded here, as I don't want to damage the pump, as cavitation can eat through metal.

[mudnut]

I risked at trip into town, as mechanic pointed me in the right direction. I have bought a metre of aeroflow series 400 hose. The salesman reckons it should be OK to use a hose clamp on it. Unfortunately it is blue, but beggars can't be choosers. It is way stiffer than the 1/2" I have on so should resist collapsing under suction.

[mudnut]

Replaced the hose and the whirring noise has died down. I will take it for a drive tomorrow to check it at higher revs.

[dom14]

Replaced the hose and the whirring noise has died down. I will take it for a drive tomorrow to check it at higher revs.

Wrap some heat resistant paper or wraps around it. I reckon the reason they go brittle is from the exhaust heat.

[mudnut]

Wrap some heat resistant paper or wraps around it. I reckon the reason they go brittle is from the exhaust heat.

That and the fact it has been on the vehicle for 22 years:) I used the fibre-alloy wrap and a the standard foam sleeve.

[mudnut]

The noise has gone even after the system has been running for ages. I'm sooo heppy.

[nissannewby]

Did you take the 1/2" line back and slap old mate with it?

[garett]

correct me if i'm wrong but isn't the powersteering on the intake side.... of a td42 or am i special.

[nissannewby]

Mudnut has an rb30

[mudnut]

Did you take the 1/2" line back and slap old mate with it?

Nah, still haven't paid for it yet. He has been very good to me over the years. He had ordered 5/8 hose and was actually going to swap the hoses for nothing. But I didn't like the idea of sitting out here in the tinder-dry paddocks with no mode of transport, so grabbed the other hose and fitted it.

I just hope the cavitation has done any damage, because I prodded the Old Trol with a stick after fitting the other 1/2 inch hose. After I found out that it was restricting the pump, I didn't get the engine over 2000 rpm.

[garett]

Mudnut has an rb30

so i'm special...

[dom14]

so i'm special...

So you wish.... ;) :D