Question about 2001 Hyundai Accent

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Upon start up, have what sounds like valve train noise

When I first start the car, engine makes rattling noise which sound like valves goes away on accel but you can hear it again when you decel.
After it warms up it almost completely goes away. I use 10 40 penzoil and change it and filter every 3 thousand car has 89000 on it.

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SOUNDS THAT YOUR TAPPETS ARE NOISEY COULDN'T TELL YOU IF ARE ADJUSTABLE OR THEY ARE HYDRAULIC TAPPETS NEED TO REFER TO HYUNDAI.

Posted on Dec 17, 2008

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Why is there a knocking sound from the top of the engine?


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if you think it could be in the valve train try this. Add 1/2 can of seafoam motor tune to the oil. Start the car and let it run. If the noise goes away it was a valve train issue. change the oil and make sure you are keeping up with the proper maintenance for you vehicle.

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If it increases with RPM that means you may have a serious issue.

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Check under the hood and inspect the valve cover gasket. If it's bad it would explain why you don't see any leaks on the ground because it's probably burning off on the manifold. This ticking you're hearing is a lack of lubrication to the rocker arms. Apart from the valve cover gasket, you should get under the car and inspect the oil pan and oil filter for seepage. Best of luck on your problem.
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This may be due to old oil. I'd first try changing the oil. The viscosity of old oil may be to thin causing serious run off in the top end. All of the lubrication may be off of the valve assembly causing it to chatter and make these noises until the motor can re-lubricate the valve train.

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