Sonata 95 v6 engine noise

[Mikito Harakiri]

My Sonata 95 V6 started to sound like a race car on low RPM (<2200). I'm not 100% sure though if it's an engine, as the noise is smaller when engine runs in neutral (or parking) gear. Thank you for any hints.

 

[Harvey]

My Sonata 95 V6 started to sound like a race car on low RPM (<2200). I'm not 100% sure though if it's an engine, as the noise is smaller when engine runs in neutral (or parking) gear. Thank you for any hints.

If you mean it emits a high pitched whine then my 98 Sonata has the same problem at first startup each day. I have tried two dealers and neither can tell me what it may be. The sound starts at 1500 rpm and stops at 2000rpm. It happens for maybe a minute or two then disappears for the rest of the day. Happens every day. If you get an answer I would love to know what it was.

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[Mikito Harakiri]

If you mean it emits a high pitched whine then my 98 Sonata has the same problem at first startup each day. I have tried two dealers and neither can tell me what it may be. The sound starts at 1500 rpm and stops at 2000rpm. It happens for maybe a minute or two then disappears for the rest of the day. Happens every day. If you get an answer I would love to know what it was.

It still had 3.0 liters Mitsubishi engine that year, right?

Well, my problem is quite the opposite: the engine is calm when cold. It sounds like a motorcycle when hot in the 1500-2200 rpm range. Especially, when I press the gas pedal. Can I reprogram the cooling system to cool it more? (Couple of years ago I asked the mechanic to lower the cooling a little bit, because in the cold climate cooling indicator was sitting into the blue when running at highway speed).

On the other hand, I discovered that there was no transmission oil. Adding it didn't fix the problem, though.

 

[Harvey]

It still had 3.0 liters Mitsubishi engine that year, right?

Well, my problem is quite the opposite: the engine is calm when cold. It sounds like a motorcycle when hot in the 1500-2200 rpm range. Especially, when I press the gas pedal. Can I reprogram the cooling system to cool it more? (Couple of years ago I asked the mechanic to lower the cooling a little bit, because in the cold climate cooling indicator was sitting into the blue when running at highway speed).

On the other hand, I discovered that there was no transmission oil. Adding it didn't fix the problem, though.

Yes... mine is the early 98 model with the 3lt engine.

I guess no transmission oil may have had a little to do with it. Refilling may be a little too late to prevent the damage. My car has had ongoing transmission problems since I bought it. Transmission had to be stripped when it was less than 1 year old as seals had collapsed. No matter how many times I have leaks repaired they tend to return within a month or two. It rattles like a diesel on some days and on other is relatively quiet
- this seems to be sticking lifters (I have had 4 lifters replaced over the last 18 months but it continues at random so have given up on that - it did fix the collapsed ones but it continues to rattle some days). Sorry I can't be of any help but I guess this is just one of the many problems of owning an older Hyundai.

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[Paul Sharon]

I have a 2002 Santa Fe. About around 30,000 km my tranny would jump rpm's went coming to a very near stop. When looked at they found that the gear pump wasn't working (or even never worked) and caused damage to the tranny. After replacing it with a new one I went about a month when I would get a high pitched whine going from 3rd to 4th - almost like gear slippage. The whine was directly related to engine rpm's. This was worse when cold and has progressively gotten worse to now at all gears. Hyundai has ordered yet another transmission.

Harvey wrote:

On 11 Aug 2003 10:53:58 -0700, (Mikito Harakiri)
wrote:

>Harvey wrote:
>
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>>On 9 Aug 2003 15:39:41 -0700, (Mikito Harakiri)
>>wrote:
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