The Original i30 Owners Club

GOT PROBLEMS OR ISSUES? => PETROL => Topic started by: pidim on May 12, 2014, 02:24:39

Title: "Diesel sound" on warm startup
Post by: pidim on May 12, 2014, 02:24:39
Hi everyone.  I was wondering if this is normal on a GD i30 1.8L petrol engine. 

Each morning I start the car from cold and everything starts normally... no issues

What I have noticed with the car (since new) is that if you start the car again around 20-30 mins after driving, it makes a "diesel rattle" sound for 1 second or so and seems to disappear when oil gets to all parts of the engine.

After 2 years, I've never questioned it because I also had a Toyota with a similar characteristic but lately it's got me thinking whether this can be fixed.

1) Is this symptom OK on a warm engine startup if oil may not have fully settled in the sump and does it happen to other owners here? 
2) Is this a fault of some kind - eg oil pump?
3) Or can it be improved with a better oil - eg 0wx40

Can anyone offer any advise as to what I should tell the Hyundai dealer in tech talk.

Thanks for any help anyone can offer   :)
Title: Re: "Diesel sound" on warm startup
Post by: Phil №❶ on May 12, 2014, 02:34:23
This is only a theory, but it would be most likely the result of oil completely draining from certain areas of the motor to the sump. As the oil pump is not operating till the engine is started, there has to be a period of low oil, until supply is resumed. Other manufacturers may design their engines to leave pools of oil, which cancels the initial start up noise.

I hear it in the Diesel too, so not really anything to worry about, as long as the oil pressure light extinguishes quickly at start up.
Title: Re: "Diesel sound" on warm startup
Post by: pidim on May 12, 2014, 02:42:48
Hi Phil, thanks for your quick response.  Yes the light definitely extinguishes after a very short time.  Do you think this would be improved with better oil?
Title: Re: "Diesel sound" on warm startup
Post by: Phil №❶ on May 12, 2014, 02:48:09
Hard to say, what are you running at the moment.

Most members are using 0-30 to 5-40. The 0 oil is designed to remain thin and viscous in winter conditions. This allows the oil to drain when the engine is off, so I don't think there will be any benefit by moving outside theses ranges.

Always use good brand oils, don't skimp on quality for price, the oil is the blood of your engine.
Title: Re: "Diesel sound" on warm startup
Post by: pidim on May 12, 2014, 02:54:41
Yeah I wish I knew what oil was used, but it was serviced at the Hyundai dealer, so I have no idea.  I'm also about to book my next service coming up in June.
Title: Re: "Diesel sound" on warm startup
Post by: Phil №❶ on May 12, 2014, 02:58:06
Many members supply their own oil filter and oils. Get a quote from you dealer, then after the price is given, ask them for a price without oil filter and oil. It should be significantly cheaper. I buy oil on special and save $ this way.
Title: Re: "Diesel sound" on warm startup
Post by: pidim on May 12, 2014, 03:13:26
I've thought of doing that sometimes, but what's to stop the apprentice doing the job throwing in the boot of his car and giving me the standard oil?
Title: Re: "Diesel sound" on warm startup
Post by: Aussie Keith on May 12, 2014, 04:26:48
The Getz did this at one point. Changed the oil, problem resolved. Never done it since. The replaced oil was supplied by a dealer at a scheduled service.
Title: Re: "Diesel sound" on warm startup
Post by: Phil №❶ on May 12, 2014, 10:49:21
I've thought of doing that sometimes, but what's to stop the apprentice doing the job throwing in the boot of his car and giving me the standard oil?

They do return the empties, but unless you stand and watch, I guess they could do that. I don't think they would do that though because if caught, there would be hell to pay.
Title: Re: "Diesel sound" on warm startup
Post by: Doggie 1 on May 12, 2014, 12:19:43
It sounds to me like oil not getting to the top end as quickly as it should.
As suggested, I would replace the oil (& filter) with a quality oil of your choice that meets the specified criteria.
I use a non-Hyundai workshop so trust my mechanic that they use what I supply.
I'd try that and see how you go.  :)
Title: Re: "Diesel sound" on warm startup
Post by: pidim on June 19, 2014, 04:04:36
Just thought I would update this in case anyone is interested.  I have just completed my 2 year service and used Shell Helix Ultra 5w x 40.  I can say the problem has been fixed and not only that, it also rectified the "Wierd Noise on Startup" topic from cold starts.
Title: Re: "Diesel sound" on warm startup
Post by: Doggie 1 on June 20, 2014, 10:12:31
 :goodjob:
Good news.
Title: Re: "Diesel sound" on warm startup
Post by: Dazzler on June 20, 2014, 10:31:33
 :whsaid: Dave swears by that oil too...  Mind you he swears about AAMI, Qantas, Telstra and a lot of other stuff too...  :lol:
Title: Re: "Diesel sound" on warm startup
Post by: Phil №❶ on June 20, 2014, 10:32:10
 :rofl: :rofl: :rofl:
Title: Re: "Diesel sound" on warm startup
Post by: Doggie 1 on June 20, 2014, 10:33:12
 :lol:
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