Front wheel bearing noise isolation and other issues - Kia Forum
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#1 (permalink) Old 08-24-2011, 04:07 PM
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Default Front wheel bearing noise isolation and other issues

I bought an '02 Sedona LX with 105K on it and have begun bringing back to life. I bought it with a discharged battery and it hadn't been driven in about 6 months. I've discovered that I have multiple issues to deal with.

It was stalling and impossible to start once it was warmed up, turned out to be the Mass air flow meter but I replaced the 3 coils, wires and plugs first thinking that was my problem. The previous owner had electrical tape all over one coil and much of the plug wires so I assumed that was the issue.

I pulled the front T-belt cover and rotated the crank to TDC and the front cam was off one tooth. The belt had been replaced so I assumed they either did it wrong or they hadn't replaced the tensioner which allowed it to slip. I pulled it all back loose and re-aligned the cams and replaced the tensioner (those back cams were a lot of fun). That's done.

I replaced the drive belts but I have a grinding noise in the belt area of the motor that I think is a pulley but I checked them both when I had them off and they seemed fine (not loose and no catches in rotation). It seems to be worse when the car is at idle and in a gear. It goes away with throttle and seems to be worse on cold start-up.

I've also been chasing that common humming noise in the front end that these have. When I drive it the noise progresses as I speed up and doesn't change pitch when the tranny shifts. It goes away when I bank to the right which leads me to believe that it's the right wheel bearing. As I bank right the bearing doesn't howl because the weight shifts off of the right bearing (correct?). I jacked up the front and let it go in drive to rotate the front wheels but (of course) they don't want to make noise without load on them. I didn't hear any noise in the right wheel (as I do when driving it) but heard a little in the left wheel.

I took the right steering knuckle off and it spins loose and free as can be but has no noise or catches in it when spun by hand. I've tried two used ones on that corner and they both didn't spin as loose as my original one. Do you think my right bearing is bad and the two used replacements just happened to be as well or am I just hearing the noise from the wrong side? Am I right in understanding that the noise going away on a right turn means the right wheel bearing?

Sorry for the long post.
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#2 (permalink) Old 08-24-2011, 04:11 PM
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Default Sorry, forgot to mention

Oh yeah, the noise in the front was the same with 2 different sets of wheels and tires so I don't think it's a tire noise.
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#3 (permalink) Old 08-25-2011, 06:30 PM
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Default Update

Took it to my friend's shop today. Got it up on the rack and he was able to confirm that there was still a little noise in the right side that I replaced but the bulk of the noise was coming from the left knuckle. That would be counter to my understanding that the noise stopping on a right turn dictates a right bearing problem. The upside is that upon swapping out the right knuckle the second time I ruined the outer tie-rod end so I now have a new one.

Found a few more issues as I looked at the underside. The front lower motor mount needs replaced. There seems to be an exhaust leak and it's possible it's the rear manifold (cracked?). The right drive axle has been leaking but it's not a wet grease. The left strut appears to have been replaced but the right strut is a little moist.

I drove it quite a bit for the first time today and noticed that the van seemed to begin to shudder as I was driving along the street at cruising speed. It seemed to stop if I gave it throttle or let off on the gas. It's not a tire or wheel issue because it would not be doing it and then it would just start, like someone had thrown a switch.
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#4 (permalink) Old 08-31-2011, 06:13 AM
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power steering pumps often culprit for noise.
It could be worn.

Also, wobble the wheel top in/out from engine bay as you rotate it.
If bearing dry, it can grab - and you can feel it.

Longer drives will show up bearing problems....

Family man with Kia Carnival 2001
KV6 petrol engine variant.
Rebuilds after years of using as a 4WD substitute...
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#5 (permalink) Old 08-31-2011, 09:17 AM
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Yes, it could be the PS pump but it seems to be coming from the idler. It seems to go away after it's warmed up so a pump seems likely.

We checked for wobble of the wheels when we had it on the rack. He tightened the spindle nut on the spindle I replaced but the driver's side was sucked tight.

It doesn't take a long drive to get bearing whine. It starts from cold start on or warm start on, never stops. I'm trying to decide whether to go with bearing replacement or the used route again. Having a harder time finding the left side than I did with the right side. We'll see.

Thanks for the advise.
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