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2003 Mercury Mountaineer Question: LIFTERS ARE KNOCKING

 

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whtieoak, 4.6L V8, Bluefield, WV, November 03, 2009, 16:20
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WHEN I START THE VEHICLE AFTER IT HAS SET A WHILE THE VALVES MAKE A LOUD KNOCKING SOUND I HAD NEW VALVE LIFTERS INSTALLED AND IT STILL KNOCKS. ONE OF THEM COLLAPSED AND THE MECHANIC REPLACED IT BUT IT STILL DOES IT. WHEN I GET THE OIL CHANGED IT WILL QUIT FOR A FEW DAYS THAN START AGAIN. I USE 5W20 OIL IN IT AS IT CALLS FOR.

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  • Answer #1

    November 03, 2009, 17:37
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     Master

    check the oil level if your missing oil fill to spec also get a lucas that always works good for me may work for you too.

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    whtieoak, November 03, 2009, 18:55
     Rookie

    THE OIL LEVELS ARE FINE IF I USE LUCAS OIL ADDITIVE SHOULD I USE SYNTHETIC SINCE IT USES 5W20 SYNTHETIC THE VEHICLE HAS A 104,000 MILES IS IT POSSIBLE THE LIFTERS ARE JUST BLEEDING OFF . IT HAS EXCELLENT OIL PRESSURE ON START UP AND WHILE DRIVING.

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