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Hyundai engine knocking


Josh
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Hi all,

My wife's 2016 Hyunai Santa Fe's engine started knocking on Boxing Day towards the end of a 10 minute drive. 

It seems to be coming from the top of the engine, from one of the two middle cylinders. From reading I've done, it seems like it could be "injector nailing" where fuel ignites before fully getting into the combustion chamber. 

A garage looked at it today and said that they feel like it's something within the engine and it's not advisable to drive it. I've parked it on a residential street near to the garage for now. 

I've tried phoning around engine specialists, but no one is answering due to the time of year. 

Has anyone come across this before that may be able to help in diagnosing it? The noise starts after about a minute of driving from cold.

Admittedly, the car is due a service, and when I took the oil cap off, it had sludgy black oil on it, so wondering if this could have blocked an oil way and caused starvation. Surely a warning light would come on if so. 

Thanks for any help,

Josh

Edited by Josh (see edit history)
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On 12/29/2022 at 10:32 PM, Swampy442 said:

First thing Id do is pull the error codes. You might find you have an injector down or something 

Thanks for that 😊

Another garage checked and there are no error codes. They unplugged each injector and the noise changed slightly but remained with each one. 

The guy that looked at it thinks it's an issue within the head, possibly something stuck. 

I replaced the oil and filter earlier and the noise persists. I moved a strong magnet through the old oil and nothing stuck to it, but there were quite a lot of copper coloured metal flakes on the filter. 

I'd be happy to take the cam covers off to check what the issue is, but may as well ask the professionals to do it so it can be (hopefully) repaired at the same time it's apart. 

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I can't see that there have been any engine issues with this model, so seems to just be one of those things. 

I have it booked in with an engine specialist on Friday, so hopefully they'll find the issue easily and it'll be a simple repair... 😬

I'll send an update once it's gone for surgery lol

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  • 3 weeks later...

Update:

The mechanic the car is with has confirmed the crankshaft main bearing beneath cylinder 3 has worn out and is loose. The crankshaft has been scored by it, so needs to be replaced. 

He's looking for a replacement bottom end or full replacement engine, which isn't ideal. 

I'd like to just sell the car as spares or repair and get something else, but it feels like it'll be worth repairing it and getting rid of it. 

Not the best timing with the wife on maternity leave!

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18 hours ago, Josh said:

Update:

The mechanic the car is with has confirmed the crankshaft main bearing beneath cylinder 3 has worn out and is loose. The crankshaft has been scored by it, so needs to be replaced.

Seems unfortunate for a 2016 car, was there big mileage on it? Petrol or diesel?

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15 hours ago, Swampy442 said:

Did say bearing material 😞  Id be contacting Hyundai Uk with your findings, you may well get some good will In the form of repairs or an engine. Definitely worth a shot

Definitely worth a try 

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On 1/25/2023 at 9:21 AM, TuneR said:
On 1/25/2023 at 6:06 PM, Swampy442 said:

Did say bearing material 😞  Id be contacting Hyundai Uk with your findings, you may well get some good will In the form of repairs or an engine. Definitely worth a shot

Spoken to Hyundai and they said it has to be less than 5 years old and it needs to have been serviced annually by Hyundai for them to get involved and give any assistance. 

I've done a lot of research and ringing around, and we're getting a second hand engine fitted. 

Hopefully won't cost any more than £5k for the supply and fit, but not happy at all about paying it!

 

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