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Power Steering Pump: How Loud is Too Loud?...



JimF

ClioSport Club Member
  Clio 172
As above really.

Boiled the power steering fluid on track last summer and ended up bursting the pressure sensor. The pump pretty much ran dry, and was driven about 10 miles until it was refilled with new fluid (i.e. I drove it to Halfords, not 10 miles on track). Also, because I had many many miles to drive home, I put a tube of PSF leak-stop in.
Got home, changed the leaky sensor, topped up the fluid, and forgot about it. Drove it once or twice, but a house purchase and a new daily distracted me.
Fast forward to a couple of months ago, my daily was off the road so I started using the Clio again. It drove fine but the pump was noisy. Daily got fixed, no trackdays booked, forgot about it.

Was using a couple of weeks ago and really noticed how noisy the power steering pump is. Total supercharger whine. It doesn't really change with how much you turn the wheel, more revs dependant. You can sit there with the steering wheel centred, and rev the engine, and it whines like it has a blower.
Tried taking a video but it wasn't too easy to hear, but its definitely loud.

Is the pump knackered? I've got Blyton in August so want it sorted before then.
 

R3k1355

Absolute wetter.
ClioSport Club Member
Also get a power steering cooler fitted, so you don't f**k the next one up doing the same thing.
 

JimF

ClioSport Club Member
  Clio 172
I was considering a power steering cooler after it happened actually. Good to know I wasn't miles off with that thought, but I want to ask a really stupid question:

Obviously in the case of an oil cooler, it's fitted into a complete circuit and its pumped round and circulated etc.
Does a power steering cooler not just cool the stationary fluid in the cooler and nothing else? I've seen ones tee'd off just below the reservoir. It's not like its constantly being pumped round like coolant... Or do you tee the return from the rack or something? Am I making sense? If the cooler is plumbed from below the reservoir then the fluid will just be flying through the rack and pump etc, and still be roasting hot...

Am I wildly missing the point after too much decorating this weekend? You know when you overly concentrate on something and then it stops making sense? Thats me, now.

Also, is it correct that the pumps aren't made anymore? If so, what's my best course of action? I don't fancy an electric rack, so do I need to loop it and grow some muscles for parking?
 

Touring_Rob

ClioSport Club Member
I was considering a power steering cooler after it happened actually. Good to know I wasn't miles off with that thought, but I want to ask a really stupid question:

Obviously in the case of an oil cooler, it's fitted into a complete circuit and its pumped round and circulated etc.
Does a power steering cooler not just cool the stationary fluid in the cooler and nothing else? I've seen ones tee'd off just below the reservoir. It's not like its constantly being pumped round like coolant... Or do you tee the return from the rack or something? Am I making sense? If the cooler is plumbed from below the reservoir then the fluid will just be flying through the rack and pump etc, and still be roasting hot...

Am I wildly missing the point after too much decorating this weekend? You know when you overly concentrate on something and then it stops making sense? Thats me, now.

Also, is it correct that the pumps aren't made anymore? If so, what's my best course of action? I don't fancy an electric rack, so do I need to loop it and grow some muscles for parking?
Negative - you are not making sense.

The cooler goes into the low pressure line between reservoir and pump so fluid is always going through it.

I need to fit a cooler also, I plan to fix it to the crash bar behind the grill so it gets some airflow across it, on the pump side of the engine the low pressure line looks pretty easy to modify.
 

Touring_Rob

ClioSport Club Member
Not a Clio (obvs) but something like this:
1654524628102.png


1654524786377.png
 

JimF

ClioSport Club Member
  Clio 172
Perfect thanks! I'm up to speed now I think lol. That's where I'd planned to mount it as well.
Next question is.... Are the pumps still available? If not, can you rebuild them?
 

Beauvais Motorsport

ClioSport Club Member
Perfect thanks! I'm up to speed now I think lol. That's where I'd planned to mount it as well.
Next question is.... Are the pumps still available? If not, can you rebuild them?
Technically they can be rebuilt, new vanes, bearing sleeve, pressure valve.. Theres a company on ebay that offer refurbished pumps, what they actually replace is another question.
 

Touring_Rob

ClioSport Club Member
Technically they can be rebuilt, new vanes, bearing sleeve, pressure valve.. Theres a company on ebay that offer refurbished pumps, what they actually replace is another question.
I think this is the company that most will use tbh - the pump I got from them was noisy out the box which really annoyed me as they aren't a 20min job!

This is the eBay refurb place:

The pump its self is a very common pattern, Renault, Nissan and a few others used them...

This is the Nissan part (which carries a Renault part number):

If I was buying another I would probably buy the TRW or Meyle pump from Autodoc...
 
Last edited:

JimF

ClioSport Club Member
  Clio 172
Thanks, I've had both those on my watch list but the second one is out of stock, and the first one I've not much confidence in, as Beauvais Motorsport said.
Onto Autodoc!
 

JimF

ClioSport Club Member
  Clio 172
Also, most pumps are stated for cars without AC, are these just Cup only pumps then?
 


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