weird thumping?

[yours_falsely]

I recently bought 4 tires from Costco. They installed and balanced the tires but no alignment. After a few days, I got the bolts tightened. After driving about 200 miles after the installation, I now hear this low thumping coming from the rear of the car. Could this come from not having an alignment?

[WeeYari]

Could this come from not having an alignment?

No. Other than that, I got nothin'. :iono:

[Vinceb]

check to make sure your spare is screwed down tightly in the trunk and make sure the tire wrench isn't loose and banging around ?

[bronsin]

Could be lug nuts not tightened.

Could be tread squirm/defective tires. Look at the tread. If its squiggles its a bad tire.
Could be loose wheel weights used to balance the tires.

I fell safe in saying its NOT alignment cause it started thumping AFTER they installed the tires.

Good luck...tell us what you find out!

[yours_falsely]

Spare is tight. wrench is secured. I checked the lugnuts today and they all seem tight. I was thinking that maybe they weren't balanced quite right but I wasnt sure if that would cause the problem. I'm gonna go out and check the tread now.

[sex]

Costco should have free balance and rotation. You can have them rebalance or rotate or both. Is it noisy at all speeds? Periodic noise or intermittent? During acceleration/braking, turning, and in a straight?

[Lil Abner]

Yeah, bring them back and have them re-checked for balance issues.

[TLyttle]

I dunno, sounds like a bad tire to me. I always feel there are places to save money, but tires ain't one of them...

[yours_falsely]

Costco should have free balance and rotation. You can have them rebalance or rotate or both. Is it noisy at all speeds? Periodic noise or intermittent? During acceleration/braking, turning, and in a straight?

They balanced them when the tires were installed. I hear it at all speeds however it is quieter. Acceleration, braking, turning and straight, the sound is there all the time. I would take it to costco but I'm now at college and even if i could find a costco around here I don't have the membership card. My parents do. Looks like i might have to pay someone to check it out.

[Bluevitz-rs]

It could just be the new tires are noisy. I have some old Parada spec 2 yokohama's on my old Honda and they make SOOO much noise it's insane. Sounds like my wheel bearings are ready to explode.

[yours_falsely]

i feel like new bridgestones shouldn't be that noisy. Idk for sure though. I certainly hope not though.

[Lil Abner]

Well, just because they balanced them, doesn't mean they are currently balanced! The weights used are often stick-on ones, so it's possible a small one fell off in the back. Because it's the rear suspension, you wouldn't feel it as much as the front.

[yours_falsely]

So after troubleshooting for days I felt I missed something and headed to a local tire shop. I explained the issue and they took my yaris around back. 15 minutes later, the guy comes back with a screw in his hand. Apparently this is what was causing the problem. Wow. Thanks everybody for your help lol

[Lil Abner]

A screw IN the tire tread?? Ouch. But that would explain it...sort of. I've had a tire in my tread, and never heard it. You must have good hearing!!

[yours_falsely]

Yeah it was in the tread. I wasn't the only one who heard it though. And it was a decently large screw. Had I not had new tires I probably would have a flat.

[Revsson]

Just a screw?...and here I thought it was someone stashed in your trunk who
wanted to get out. :tongue:

Thanks for keeping us updated on the final cause.

[bronsin]

So...they guy took the screw out of the tire? And its still holds air?

Like...how long was the screw? I mean you better check your tire pressure over the next few days to make sure you dont have a slow leak.

Just because a tire is new doesnt mean it cant have a puncture.

[yours_falsely]

Yeah he took it out and gave it to me. pressure seems fine so far. I guess we'll see how it holds up.

[yours_falsely]

Looks like the tire may be punctured after all. i'll be going tomorrow to get pricing on getting it fixed.

[MUSKOKA800]

Could be that that screw was throwing off the balance and causing the thumping you heard/felt. Once removed all is good once again.

[Lil Abner]

Well, some places offer warranties with tires to cover holes in the tread. If not, it should be less than $20 to fix it.

[MUSKOKA800]

Thrown weight or bad tire.

[yours_falsely]

Yeah I'm going to take it in on Saturday to get it fixed