RE: troublesome Volvo (98 AWD V70 station wagon) - knocking on turns

Ok… we had a LOT of work done on the car (see below for my original post), spending over $2,500. The mechanic replaced the steering rack and pump, and now he did all sorts of work. He replaced the control arms, axles, charged the AC and replaced a pump that was part of the AC system. There’s probably more to it than that, but all that seems fixed is the AC & heat now work, but we still have the high-pitched hissing noise when we turn it off.

The CV joints were gone and the axles did need replacing, plus I saw how rusted out that pump on the AC was, but can’t understand why it’s still knocking on turns!

The control arms and axles that were installed were Chinese and new, with lifetime warranties.

What do I do? Could it have been something else?



(original message)

My girlfriend and I are having much trouble with our new-to-us '98 Volvo station wagon (V70, AWD). It’s got about 110k on it, and I should hope, last many more. It’s been in the shop 3 times so far, and all that’s been fixed is the master control switch for the power windows on the driver’s side door (which finally works well).

Since we’ve owned the car (3 months, now), we’ve had a knocking sound that can also be felt in the steering wheel on turns (particularly sharp ones) and it happens turning right or left. The previous owner had brought this to his Volvo dealership and they thought the wheel was touching a loose fender, which they found under the car by one of the front two wheels (I believe it was the right one, but can’t remember), but commented that it hadn’t fixed the problem.

My mechanic of 5 years, claimed it was related to a failing power steering pump and a damaged rack. The replacement of which would be over $1,000. Since he’s a good guy, he charged me $1,024 (got a free alignment), and it’s finally back in our hands. However, the problem has NOT GONE AWAY AT ALL! The stiffness of the steering still changes on turns or curves (it’s like rolling a dice as to whether it’ll behave like it should on each turn), and it still makes the bumping noise and vibration on (some) turns. Plus the service light and the check engine lights still come on – however, they do not remain on or consistently come on when the car is started.

When the check engine light is on, the AC seems to not work (the air coming out is a bit cool but not “cold” like it should be). Perhaps that’s related to a malfunctioning temperature gage, since this AC you set by setting the temperature you want (separate for driver/passenger side). My mechanic “found no problem with it”.

Between the last time we dropped off the car and the time before that, the AC was making high pitched wheezing noises when it was turned off and strange knocking noises that sounded like an animal was kicking the fans within the dashboard or something, it’s tough to describe. Since we got the car back last, that hasn’t happened (maybe it was the power steering pump?). However, it still gives out a high pitched noise a few minutes after the AC (or the car) is turned off. Again, my mechanic apparently couldn’t hear any of this.

We were told to bring the car back and have the mechanic drive around with us to point out all the issues. Before we do that, please give us a sense of what could be causing the bumping noise/vibration on every turn (and any info about the service lights/AC issues while you’re at it)!

um, I can’t answer your questions, but I have a 98 V70 station wagon, not AWD. Its R rear window only goes up when it wants to. The AC doesn’t work. The radiator is being replaced now. I bought an aftermarket radiator (Nissen) which I hope will be OK. I have only had it for a few months. I live in a place where volvos are little known…so I thought we should form an alliance.