1998 S70 T5 Rotational whump noise

GinkoJK2 · Post by **GinkoJK2** » 20 Jan 2015, 05:16

I took this video yesterday when I got home. Unfortunately, I didn't get a chance to jack it up and fool around with it. You'll have to ignore the squeaky dash....It was nice and tight but this issue has shaken it loose again. I probably should have put some locktite on the bolts when I fixed the dash mounts.

98volvo s70 T5 whump noise:

Post by **abscate** » 20 Jan 2015, 10:57

Try jacking it up, and letting the wheel spin in the air while you GENTLY feed gas.

You might be able to tell noise from wheel bearing (outside of wheel) from CV joint (under car)

jackstands and a driver inside you trust with your life.

GinkoJK2 · Post by **GinkoJK2** » 22 Jan 2015, 07:14

Finally got around to jacking it up last night and taking a look. It is definitely the wheel bearing. Could still be in combination, but I'm going to start there. I lifted the front one side at a time and since I didn't have a second person to hit the gas with both wheels up (and I don't trust anyone that much anyway) I just put it in Neutral and hand spun the wheel. I could get it just fast enough that I could hear what I think was the noise. I imagine not having the weight of the car on it makes it less prominant. I also did as Lee said and looked at how things were moving. When I grabbed the wheel at 12 and 6 the rotor moved independently of the caliber and the knuckle, tie rods, etc didn't appear to move. I also grabbed the axle to see if it felt loose. I felt pretty solid. The only movement I got was I could compress it slightly (slid it inward toward the engine slightly). Does that sound right? I let the driver side back down and jacked the passenger side up to check it and compare. Passenger side was solid. Zero play whatsoever at 12 and 6, etc. Thanks for the help!

And naturally, I now have a coolant leak too. Arg! Looks like the top reservior hose and either the top radiator hose at the thermostat housing...or from the thermostat housing itself. Still cheaper than a monthly car payment, I suppose. Wife hates this car. lol

Post by **abscate** » 22 Jan 2015, 19:04

Luckily the work to service both the axle and the CV is almost the same.

Post by **Ozark Lee** » 22 Jan 2015, 21:08

The only movement I got was I could compress it slightly (slid it inward toward the engine slightly). Does that sound right?

Perfectly normal.

...Lee

1998 S70 T5 Rotational whump noise

Re: 1998 S70 T5 Rotational whump noise