Question about 2003 Chevrolet Avalanche

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  • coneedham Mar 13, 2009

    I have the same problem. My 2003 only has 45,000 miles on it. This problem started a couple of months ago. It ticks very loud when started but after engine warms up it stops. The problem also seems to be affecting my oil pressure. Strange thing is when I have my oil changed it stops for about the 1st 1200 miles or so and then starts up again. I have had the truck checked out and they cannot pin point the reason for this. I have had the oil pan dropped and cleaned and the pick up tube replaced. They have also checked the oil pump and it is fine.

  • Anonymous Mar 22, 2009

    i have the same problem but now mine dosent stop and now it misses on #4



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Stuck Hydraulic Lifter...

Posted on Mar 12, 2009


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Have a 06 Pilot with 3.5 v6 and 120000 miles. Has developed a ticking in valve train. Valves were adjusted, plugs replaced engine is spotless inside no visible signs of any problems and no codes yet...

the valve train has nothing to do with the adjustment of the valves , , the ticking sounds like something may be hitting somewhere , when you rev the engine does the ticking go faster or what you have to be more specific on this problem ,

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Whats the ticking sound all of a sudden?

It sounds like a collapsed hydraulic valve lifter- a part of yoiur valve train in the upper engine. You need to have it checked at a shop you trust I don't know of any oil additives that can cure this, although someone here may give you some advice.
Loose valve train noise is common on high-mileage engines, but if it is a collapsed lifter, I think you should have it checked.
A loose timing chain will make a rhythmic slapping sound, but the ticking you describe sounds more like it's in your valve train. Have someone check it.

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The ticking could be a spark plug wire shorted out to ground of which you can watch in the dark while the car is running and see if you see a plug wire jumping to ground which will look like a lightening bolt hitting the ground. It could also be a lifter making noise. Could be a exhaust leak. What is your oil pressure? Does your gauge tell you pounds of pressure or is it just a light?

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Most dodge motors have adjusters on the rockers for taking up slack in the valve-train. when these get worn or plugged by dirt they turn the valves from soft hydraulic to hard ticking due to a space between the lifter and the valve. If this is an overhead cam with roller lifters then these have become worn or fouled.

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