it got progressively worse

mine is going to get fixed under warranty and the dealer has the pump but i dont have the time to do it yet .
Oh well
ive gotten used to it
They that it would only take 1.5 hours to do

 

Interesting hypothesis - the power steering froze to death!

That would blow the hell out of Pruven Performance's claim that it's caused by overheating. Or maybe it's both extremes, and we're only supposed to drive in temperatures in the 40-60 degree range.

BTW - I've been driving in the sub-zero temps and haven't had any problems so far, but then again I just clicked 340 on the odometer.

 

Well, I've been thinking about the freezing part too, and I think that the freezing of the actual pump and/or lines going out of it, could cause overheating of the fluids if once you start running your car, the proper flow is not capable of happening so the pump begins to overwork and therefore start overheating. This is just what is going through my head, I don't have an engineering degree or any proof that this is what actually is happening.

I plan on going to the dyno day at Pruven at the end of this month and will inquire about the power steering cooler and report back as to what they say.

 

My bone stock Evo with 600 miles on it seems to have had a very shady sounding pump from day 1. I bought the car in the cold and it has been very cold since. It is not "out" per se, but it sure makes a lot of whining and *****ing in the cold. I think your dealership in Maine might have hit the nail on the head with his diagnoses.

I wonder if synthetic ATF (powersteering fluid) might help to stabilize the viscosity and protect the pump from the cold.

 

I'm an engineer at an automotive supplier, and the Big Three OEMs have predetermined operating temperature ranges for everything on a vehicle. We have to test the durability of our products between -40 deg C up to 85 C or 120 C depending on the application. That means everything needs to function many thousands of cycles at extreme cold and hot. I assume the requirements for foreign makes are just as stringent.

 

I respect your opinion here, but we are talking about a hastily imported car with a VERY low ratio steering rack running a super lightweight pump. With all the people that are reporting problems, I would have to say that may have not tested this one as thoroughly as they should have.

 

i see this thread is old i was wondering if people still had problems with the 06 Evo 9

Also how much to replace seems like its expensive