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Hot lug nuts, no always, caliper or bearing?
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Okidoky
Novice
Jun 5, 2017, 8:38 AM
Post #1 of 11
(2227 views)
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Hot lug nuts, no always, caliper or bearing?
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After feeling and hearing a vibration of sorts while driving on the highway with my 2010 Sonata, I arrived home about 10 minutes later. The vibration came on sudden and then subsided. At first I thought it was the road surface, but that wasn't it I thought later.
At home I felt around, and one of the wheels had very hot lug nuts, too hot to touch. But the wheel I didn't find very hot. The other lug nuts on the other wheels were cool.
I took the car into my mechanic and all he thought was needed was a brake service. He took all sides apart and got everything to move smoothly.
I then drove about 30 minutes on a country road without much braking action, and stopped to check the nuts. Again, same wheel, hot nuts. Other wheels, cool.
Given the heat is more in the center and not so much the whole rim (cheap steel rims), and given the vibration before, I thought maybe the bearing is bad.
Before returning home (I canceled my trip 30 minutes in, because of the heating problem not being solved), I let it cool down for 15 minutes give or take.
I then drove back home. To my surprise when I got back home, the nuts were not hot. Same cool feel as the other wheels. What gives? It's an intermittent problem?
First opinion is probably caliper not retracting properly, and to replace it.
But could it still be the bearing? Is it possible that a bearing shows an intermittent problem?
Another small detail: that last trip (today) where I canceled it after 30 minutes into it, I though maybe there was that vibration again - but only very slightly, and it is easy to confuse perhaps with the exhaust. There are no exhaust issues. It's hard to describe the vibration. It's subtle now.
That trip home, I felt that there was no vibration at all.
So maybe that subtle vibration coincides with that overheating. When I heard that vibration, I thought that pressing the brake pedal a few times did not make it go away.
Does anyone have any ideas? Could a stuck or not properly moving caliper cause a vibration? Perhaps making the pads jump back and forth enough to make that vibration? Again, this vibration is very very subtle now. It was pronounced for about 3 minutes on the highway when it first occurred, but subsided after about 3 minutes.
It would be logical that *if* it were the bearing that you always get the same result, where 30 minutes of driving would always make it hot, and not just once in a while, right?
~Oki
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Jun 5, 2017, 1:31 PM
Post #2 of 11
(2199 views)
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Re: Hot lug nuts, no always, caliper or bearing?
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Probably the brakes but you don't know what parts to blame yet. Caliper is just one thing that could do that or a flex hose. That much heat could have harmed the wheel bearing - can't know just yet.
Can you just hoist car with drive wheel off ground, removed wheels and just quick bleed out a spit from the hot wheel's bleeder? If wheel was stuck and car in neutral while hoisted that wheel wouldn't turn well but is also trying to turn other wheel so bleed out just a spit and see if it frees up.
After being so hot if stuck brake by caliper, flex hose or brake parts maybe just so worn can't work right do all items to both sides, lube as required slides, pins how caliper retracts and where it touches hard with brakes applied. One side that hot if the pads were new recently are probably really trashed and other harm done.
By description should be a brake problem first. A bearing almost always makes a growl for a while and if ignored long enough to drag would be just about ready to self destruct. IDK - almost no bearing just go by surprise without warnings even if not all that long a time or miles not as likely as a brake issue to be diagnosed and all parts that got that hot I'd toss for new when found what the problem is for sure and it can be found for sure. Said, bearing wouldn't have liked being that hot and may not be great now or may be a problem soon?
T
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Okidoky
Novice
Jun 7, 2017, 1:22 PM
Post #3 of 11
(2175 views)
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Re: Hot lug nuts, no always, caliper or bearing?
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The mechanic got back to me after looking at this. He thinks it is the parking brake cable. Something about one side having to be fixed, which also means that the other side should be fixed. Cable + 2 x something for both sides + something else? 3 hours of labor. $600 CDN...
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Hammer Time
Ultimate Carjunky
/ Moderator
Jun 7, 2017, 1:53 PM
Post #4 of 11
(2169 views)
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Re: Hot lug nuts, no always, caliper or bearing?
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That makes sense.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Jun 7, 2017, 1:54 PM
Post #5 of 11
(2167 views)
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Re: Hot lug nuts, no always, caliper or bearing?
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I mistakenly thought you were noticing a front wheel sorry. Almost all parking brakes are rear wheels and yes could be but why any question it's simple to just watch it move and not retract or can't move like you were putting it on and more just looking with nothing apart at all.
Still if it is it is and for $600CN that should include new pads, service rotors if possible and caliper check. Tired to look it up right now but the parking brakes on 4 wheel disc brake cars are usually applied thru the caliper which is pricey and larger vehicles will sometimes use a small drum brake hidden inside rotor. Those can just fill up with junk as junk and rust can't get out easily by itself more for larger vehicles to do it that way not this car.
The diagnosis shouldn't really be a guess if checked in person. A cable is easy to know, this caliper is not so easy to know for sure if it runs the parking brake and think it does,
T
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Hammer Time
Ultimate Carjunky
/ Moderator
Jun 7, 2017, 2:57 PM
Post #6 of 11
(2158 views)
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Re: Hot lug nuts, no always, caliper or bearing?
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This car came with either disc or drum options. If it has disc in the rear, it has a parking brake shoe inside the rotor but it could have regular drum brakes in the rear.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Okidoky
Novice
Jun 7, 2017, 3:59 PM
Post #7 of 11
(2154 views)
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Re: Hot lug nuts, no always, caliper or bearing?
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Discs in the rear. So, parking brake pads, with a drum built into the rotors?
By the sounds of it, the mechanic is replacing both pads, cable, and something else related. I thought the cost was a bit high. $600 CDN, which is about $450 USD.
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Hammer Time
Ultimate Carjunky
/ Moderator
Jun 7, 2017, 4:05 PM
Post #8 of 11
(2152 views)
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Re: Hot lug nuts, no always, caliper or bearing?
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It depends what he's changing but that doesn't sound high at all.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Jun 7, 2017, 10:53 PM
Post #9 of 11
(2140 views)
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Re: Hot lug nuts, no always, caliper or bearing?
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Ditto - not that high of a price at all if done properly you would do BOTH sides equally. Disc or drum can both add up parts and costs for parts once friction material has been baked way too hot it destroys it plus metals that go "blue" hot meaning look at it shows a blue tint after the metal is no longer right so really just replacing stuff adds up. Another type of car/truck this could add up to much more $$ than that. Know what you are getting so this isn't an instant replay again soon,
T
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Okidoky
Novice
Jun 19, 2017, 7:42 AM
Post #10 of 11
(2106 views)
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Re: Hot lug nuts, no always, caliper or bearing?
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Thanks everyone for the replies! I don't feel so totally stupid anymore, after finding out that it wasn't all that expensive. When I picked up the car, the guy showed me the cable. Complicated thing, looks like a dual cable. They weren't moving well at all. So, cables, brake shoes, spring kit, all done. $640 all in. He had to apparently take a bunch of stuff apart inside the car, under the carpet I think. A finicky bit lengthy job by the sounds of it...
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Hammer Time
Ultimate Carjunky
/ Moderator
Jun 19, 2017, 1:23 PM
Post #11 of 11
(2096 views)
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Re: Hot lug nuts, no always, caliper or bearing?
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Glad to hear it all worked out for you.
Closing this now as solved.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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