Warped Hubs

[DragBean]

Here's an update on the warp hubs.

Overall it's not great news. Someone slashed one of my front tires and discount tires is taking forever to order the replacement. Luckily I had some space tires from a honda, but they're not exactly the same, so I'm getting mis-alignment drag that's reducing my mpg, but that will go away once I put the two new front tires back on.

So I'm just focusing on the rear wheels.

I bought a runout dial indicator and measured the warp on my rear wheels. The hubs (both with and without the brake drum disk) had at the worse 0.003" lateral runout when measured on the face as seen on the picture (about 2" from the center of the wheel).

This should equate to 0.015" (1/64") lateral warp on the outside of the tire which would be hardly noticeable.

But I can see at least 1/16 almost 1/8 lateral travel on the inline grooves of my tires back there.

So the rims are most of the problem.

I even got the run out reading on the rim itself (where the bottom of the bead would be) and that was 0.020 when it should only be .006 from the warpage of the hub.

I was able to rotate my rim around on the passenger side rear to match a high of the rim runout with a low of the hub runout and was able to decrease the warp so it's hardly noticable in the lateral direction. So that idea can have success.

However nothing I tried (including breaking all the bead on both sides of the tire(s) and reseating them with soap all around) was able to improve the driver's side rear.

I drove 800 miles this weekend and got the worse tank I've ever gotten - 30 mpg as opposed to 40 mpg at a comparative speed average (80 mph). Originally the car would start vibrating enough to start shaking my rearview mirror significantly (well it's a panoramic mirror) at 80 mph but towards the 2nd half of the trip the vibrations didn't start coming till 85 mph.

I think I am going to buy one new rim, tire, and have it professional mounted and balanced so I know it's perfectly true. Then use it to help me fully troubleshot the problem here.

[redneck]

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Originally the car would start vibrating enough to start shaking my rearview mirror significantly

This is what I call "significant" shake.



That little bit of run out your reading is nothing to worry about.

It sounds more like a tire problem.

Are you sure that you don't have a tire that is separating ?

A tire that is separating will cause all sorts of problems like you are describing.

It's possible that a tire was injured in your accident.

This can also happen as the tire is nearing the end of it's life, one or more steel belts can shift.

Check all the tires carefully.


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[Frank Lee]

Dial indicators and torque wrenches?!?

I've been eyeballing wheels and tires for trueness, and using the factory-supplied lug wrenches or those nice X-lug wrenches for decades. And dish soap for mounting/bead work.

A few weeks ago I had to deal with what had to have been an impact wrench mounted wheel; normally I never need to use a cheater pipe but this bad boy needed TWO on the X-lug wrench, one for up and one for down. Oh- no warpage. That ain't gonna happen. And don't even think about using washers as spacers.

[freebeard]

That's a great GIF.

[Frank Lee]

It looks like a cat getting ready to pounce!

[DragBean]

I put tires on all 4 rims myself after the incident in LA, but that has turned into a disaster.

The car definitely did not have this problem originally. I maxed the speedo and it was smooth at every speed.

[DragBean]

The issue went away.
I'm sure it was the Nanking tires I had.
Probably was stealing an mpg.