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DI Fuel pump rattling noise #5282282 12/01/19 06:36 PM
Joined: Jul 2017
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OilUzer Offline OP
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Hyundai 2.4L GDI engine. 87K miles

I hear this Rattling sound between 2600 and 2800 rpm. Otherwise car runs very smooth.

I'm thinking the Direct Injection High Pressure fuel pump is making the rattling sound but could be wrong. Need to ask the wife to rev up the engine and check. Seems to be coming from the top of the engine right where the pump is located.

It has been cold(er) lately maybe 27°F shocked2 don't laugh please grin2
I think the noise started when it got colder but maybe something else other than the pump is causing it.

I also have another question.
I have always had the engine cover off. The cover has a hole that fits right over the High pres pump and is fully insulated all around the pump and covers it like a blanket . iirc, when I had touched the pump in the summer, it was relatively hot but when I touched it yesterday after getting off the freeway it was cold. I just put the engine cover back on. I was thinking the cover and the insulation is to suppress engine noise and the ticking noise but maybe the High pressure pump needs to retain some heat!? idk

Re: DI Fuel pump rattling noise [Re: OilUzer] #5282305 12/01/19 07:09 PM
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WhyMe Offline
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i heard the rattling on my kid 2019 tucson from the beginning. 2.4 engine. its normal. i would stick the cover back on

Re: DI Fuel pump rattling noise [Re: OilUzer] #5282310 12/01/19 07:18 PM
Joined: Apr 2007
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dblshock Offline
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try a couple tanks spiked with TCW-3 oil...worth a try.


05 Lexus GX470 175k
640:1 TCW-3
M1 0W40 XG-3614
Toyo Open Country H/T II

06 4Runner SR5 155k
640:1 TCW-3
M1 0W40 XG-3614
Falken Wildpeak AT3W
Re: DI Fuel pump rattling noise [Re: dblshock] #5282366 12/01/19 08:20 PM
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OilUzer Offline OP
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Originally Posted by WhyMe
i heard the rattling on my kid 2019 tucson from the beginning. 2.4 engine. its normal. i would stick the cover back on


This is also a Tuscon but 2014.

Originally Posted by dblshock
try a couple tanks spiked with TCW-3 oil...worth a try.

I will check it. Never heard of it before.

Re: DI Fuel pump rattling noise [Re: OilUzer] #5282378 12/01/19 08:35 PM
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Propflux01 Offline
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You are still under warranty. If you are concerned, at least take it to dealer and get it down on record that you inquired about it, let them take a listen. Its probably noting, as these are noisy in themselves, but doing that can be added insurance.


2014 Hyundai Elantra
2014 Hyundai Elantra GT
Re: DI Fuel pump rattling noise [Re: Propflux01] #5282492 12/01/19 11:30 PM
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OilUzer Offline OP
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Originally Posted by Propflux01
You are still under warranty. If you are concerned, at least take it to dealer and get it down on record that you inquired about it, let them take a listen. Its probably noting, as these are noisy in themselves, but doing that can be added insurance.


good idea about getting it on the records!

Re: DI Fuel pump rattling noise [Re: OilUzer] #5282550 12/02/19 04:25 AM
Joined: Aug 2003
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JTK Offline
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That little DI pump clatters like crazy on my 2019 Nissan Pathfinder 3.5l. It would be worse if they didn't have the foam rubber cover over it.


2019 Nissan Pathfinder SV
2017 Ram 1500 4x4, 3.6L.
2015 Nissan Versa 1.6 S
Re: DI Fuel pump rattling noise [Re: OilUzer] #5282658 12/02/19 08:12 AM
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Railrust Offline
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You'd have a check engine light on if there was something catastrophic going on with the high pressure part of the fuel system, but those Hyundai pumps have been known to fail. Like others have said, get it documented for warranty purposes and put that cover back on.

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