Author Topic: Intermittent knocking from rear right wheel  (Read 393 times)

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Intermittent knocking from rear right wheel
« July 24, 2020, 12:37:59 »
Hello all,

Purchased our i30 back in 2018 on hire purchase with Hyundai. The car has been great until recently when going over bumps, sometimes there is a knock that sounds like a pinging metal on metal noise from the rear right side.

It does not always happen, I tried to replicate it by driving both slowly and relatively fast over bumps and there is no pattern. Sometimes when cornering it causes the noise but again, not always.

I tried to push the car up and down from the boot to replicate it but that didn't cause the sound.

Im thinking it might be a shock that is worn. If it is something like this, would it be covered under the 5 year warranty? The car is 5 years old but first registered in October 2015 (assuming that's when the warranty starts), if not, how much would Hyundai charge roughly to put this sort of thing right?

Im dubious about going to a 3rd party garage in case it invalidates us giving the car back at the end of the 4 year term

Thank you


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Re: Intermittent knocking from rear right wheel
« Reply #1 : July 24, 2020, 16:34:55 »
I wouldn't think it's the shock absorber at fault, unless one of it's mounting bolts is loose. Obvious though it may sound, I would double check your wheel nuts are all tight. If they're all tight, I would jack the car up and take the wheel off. Have a look at the coil springs and make sure they're not broken. It's often the last 1/2 coil that snaps off close to the end. If they're sound, it could be a worn suspension joint, the anti-roll drop links are a common culprit when the end ball joints wear. Easiest way to diagnose it is to get someone big and strong to bounce the car vigorously up and down, whilst you listen for the knocking sound. If you're very careful, you can place your hand on the drop link joints and feel it clicking, but beware of crushing your hand as the car bounces up and down. There may be a tiny amount of play in the joint but it doesn't take much to make a loud clunk when the car's moving.

If you have to give the car back after 4 years, I assume you have a personal contract plan (PCP)? I would check the terms of service and repair in the contract. The warranty covers wheel bearings, ball joints, suspension bushes, track rod ends, shock absorbers, all rubber components for 5 years/60,000 miles, excluding wear and tear. As your car is still under warranty, why not just take it back to the dealer and get them to have a look at it to tell you if it's a warranty issue? If it isn't, and you don't like their price for fixing it, I would take it elsewhere. When you finally hand it back, I don't think they're going to mark down the value just because it has after-market drop links or shock absorbers fitted.

They would be more concerned about visible damage like dents, scratches, rips and stains on the upholstery.

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Re: Intermittent knocking from rear right wheel
« Reply #2 : July 25, 2020, 02:11:18 »
Welcome JC,

As usual Brendan has given some sound advice. Your salted roads and harsh weather conditions can wreak havoc on suspension components over there. 

i've seen this noise caused by a partly detached exhaust bracket near the rear bumper allowing the exhaust to randomly move and make a metallic clunk. So check that too (try and wriggle the exhaust - don't forget to let it cool first though!) :cool:
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Re: Intermittent knocking from rear right wheel
« Reply #3 : July 25, 2020, 09:10:26 »
As Dazzler points out, it could just be a loose exhaust.This is when you need a friendly garage that can put the car on a lift, get underneath, and see what might be rattling. Even then, it ought to be covered by the warranty, and you are entitled to a free annual car health check during the warranty period, so I'd try and argue they ought to check for something if you think it may be covered by the warranty.

A lot of garages these days won't allow you into the working area. My preferred MoT testing station is different in that they expect you to sit in the car when it's up on the lift, so you're working the brakes and jiggling the steering. If they find a worn joint or bush under the car they will invite you to join them under the car so they can show you what the problem is and give advice on fixing it yourself.
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Re: Intermittent knocking from rear right wheel
« Reply #4 : July 25, 2020, 09:57:51 »
Thank you all for your responses.

I am seeing some friends tomorrow so might ask them to help me investigate the noise and I will see if one of them has a jack I can use.


The car is overdue its MOT/Service (was due 3 weeks ago but I delayed it due to the backlog at the garage, given the age of the car I wasn't too concerned but now I will get this booked in). I'm hoping the warranty will be from when the car was registered rather than built. I will see if it is something covered. Last year the cost of service, MOT was £400 but then quoted an additional £600 for new tyres, front discs/pads and new wiper! Silly money for a 5 year old car. I do of course understand those are consumable parts and not covered which is fair enough.

If they do find the fault and quote stupid money to repair it, I'll take it elsewhere.

It doesn't happen all the time, maybe 1 in 3 speed bumps? So I don't think it will be something super serious or dangerous, but could be something that left may get worse.

Thank you everyone, I'll report back any developments
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Re: Intermittent knocking from rear right wheel
« Reply #5 : July 25, 2020, 10:16:31 »
I've booked in its MOT and service plus the free healthcheck for August 25th. £600 all in! If it wasn't on PCP I'd get the work done elsewhere, but I am sure the annual service stamp is a requirement.
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Re: Intermittent knocking from rear right wheel
« Reply #6 : July 25, 2020, 15:33:35 »
Sounds expensive even by dealer standards. Just double check it here...

:link: Request Hyundai Car Servicing | Hyundai UK

Warranty is from the day its registered.

Pinging could be lots of things.

If you didnt't have the pinging you might have got away with the cheaper hyndai Essentials Service booking it for when its 5 years  + a day old. (cars has to be 5 years old to get essentials)




Re: Intermittent knocking from rear right wheel
« Reply #7 : July 25, 2020, 16:00:17 »
Sounds expensive even by dealer standards. Just double check it here...

:link: Request Hyundai Car Servicing | Hyundai UK

Warranty is from the day its registered.

Pinging could be lots of things.

If you didnt't have the pinging you might have got away with the cheaper hyndai Essentials Service booking it for when its 5 years  + a day old. (cars has to be 5 years old to get essentials)

Thats the quote it gives me, though only gives the option for 6 years for some reason? The last service was done as 5 years, not sure why? I have the paperwork for last year still.

See the quote for this year here:

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Re: Intermittent knocking from rear right wheel
« Reply #8 : July 26, 2020, 04:42:15 »
Just looked at the link.

That service cost is way way far more than I would accept at year 5.

Think year 5 is just minor service, i.e oil change.


My car is now 8 yo and since year 5 have only done oil change as only do 5k pa, level 1 hy essential service and had 12 months free breakdown and home start cover.
 
This year I'm having an mot and level 3 essential service by a dealer and includes 12 months AA full breakdown cover worth £150, for £269.

If this is a hy dealer they should be  offering you the essential service options once out of warranty.

Re warranty.
I read hy uk has extended warranty for think 3 or 6 months if the warranty 5 years expired during covid lockdown.

You can check both out on their web page via lorians post above.
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Re: Intermittent knocking from rear right wheel
« Reply #9 : July 28, 2020, 13:52:14 »
Any update as interested in the service cost quoted

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Re: Intermittent knocking from rear right wheel
« Reply #10 : July 28, 2020, 19:51:26 »
My car (2015 CRDi) is almost 5 years old and done 62,000 miles. I had services done at 18,000 miles (£358), 38,000 miles (£380) and 58,000 miles (£495). The last service included coolant change. I change the engine oil and filter myself between services, using a Mahle filter which is what Hyundai use. I do a fair amount of business miles so the payment for that more than covers the cost of servicing.

Once the car is out of warranty, I shall service it myself. I intend to keep it for at least 10 years, by the time a car gets that old I don't think having a full service history will make much difference to the value. As long as you keep a log of what work you've done, with the receipts, and appear to know what you're talking about, I think most buyers would recognise your car's been looked after, especially if you have a succession of MoT passes with no or few advisories
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