Question about 2004 Pontiac Grand Am

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Tapping valves; oil is full but dirty - 2004 Pontiac Grand Am

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Flush the engine and change your oil. Dirty oil will clog and slow things down as well as have poor lubricating qualities. Worst case scenario, is the lifter is toast and you have valvetrain damage. Regular oil changes definitely help improve the lifespan of an engine.

Posted on Feb 07, 2014


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Slight tapping noise from engine when accelerating when engine is warm.Started about 3 days ago but hasnt got any worse.Doesnt do it when cold.

tap usually associated with lifters when vehicle warms up oil thins out and a bad or worn lifter will make a tapping noise --other oil level low --oil needs changing --low level will starve rockers/push rods/and lifters which will also cause tap ---damaged /dirty{sludge oil can cause same problems

May 24, 2016 | Cars & Trucks

2 Answers

Valve tap cause

Most engines now use hydraulic lifters and they can leak a little, this causes space between then lifter and the push rod. This results in a tapping noise that goes away when they get warm or fill back up.

Mar 13, 2016 | 2004 Lincoln Town Car

1 Answer

Oil light comes on and then a light tapping is heard in engine

Try an oil change with the manufacturer recommended oil. Make sure it is the correct weight, type and grade. I never recommend synthetic for older cars with high miles. You can also buy oil additives at the parts store designed to increase oil pressure and quiet noisy lifters/valves. Oil light means low oil pressure, usually due to broken down old oil, dirty oil filter, or incorrect oil weight used.

Jul 21, 2014 | 2002 Hyundai XG350 L

3 Answers

What can cause a knocking at the right hand side valve cover

Hi , usually a knocking / pinging from the valve cover indicates a lifter tapping. Could be worn out or just worn. Do you change your oil every 3000 with high quality oil? (I always have used valvoline standard with outstanding results) Dirty oil and filter and or incorect weight oil and or using synthetic oil in older cars can result in lifters tapping. If your oil is under 2000 miles since last change and you used a high quality oil (watch who changes your oil, some places use inferior oil because its cheaper) you can buy a pint of oil treatment formula to quiet noisy lifters to coat the lifter and quiet it down. It is a sign of engine wear, but one lifter tapping a bit wont really hurt your engine mechanically. If they all get noisy, time for a valve job. Root cause is wear due to insufficient lubrication. The lifters on newer cars are all hydraulic and they self adjust. No manual adjustment is possible. Bottom line: keep your oil changed regularly using a high quality non-synthetic oil for your 1999 vehicle.
Please rate this answer! Thanks, Mike

Jun 14, 2011 | 1999 Ford Expedition

2 Answers

When car is on whether driving or idling, it makes tappping noise.

Could be lifter noise...valve cams, parts of the engine, are supposed to move the valves up and down to let in air and let out exhaust...there are lifters that good between the cams and the valves to make sure the valves are tight against the cams, they maintain the tightness even when things wear...when the lifter stops doing its job, it lets a gap form between the valve and the cam, and a tapping is heard, actually metal hitting against metal...this could be from the lifter being damaged, dirty, or starved for oil...make sure your oil level is right, make sure the oil is clean...sometimes a dirty lifter can benefit from a fresh oil change...if the tapping keeps up, damage can occur to the valve ends or cam probably wouldn't notice the engine not running as well, unless damage occurred that caused to valve to stop working...there are lots of other sounds from the engine that are bad, like persistent knocking, which is a piston in the act of breaking, and not so bad like ignition knocking from using too low an octane gas...depending on the engine type, tapping could be lived with for years, and sometimes lifter replacement, if needed, can be fairly inexpensive...good luck...

Apr 12, 2011 | Mazda MPV Cars & Trucks

1 Answer

Oil pressure can read 40 pounds, rev the engine up

valve train noise is common in this line of engine and in no way will harm the engine, it is just a sticky cam follower

May 14, 2010 | 1996 GMC Sonoma

1 Answer

Engine tapping oil pressure is good and is full of oil

If the tapping speeds up with the engine, ten to one it's a worn valve lifter, push rod, or rocker arm.

May 14, 2010 | 1999 Ford Taurus

2 Answers

Trying to figure out where the knocking is coming from, on engine

It all depends how loud the knock is. A tapping valve can be caused by low oil level, or dirty oil. Topping up or changing oil will solve the problem. A really loud valve tapping is abnormal. Cars sometimes make what you call a spark knock when accelerating hard. Extremely loud knock coming from deep within the engine is a bad sign, which means the engine has failed. Further examination would reveal metallic residue on the dipstick.

Jun 27, 2009 | 1994 Ford Thunderbird

1 Answer

2002 Concorde valves tapping

How long has it been from oil change. Have you checked Oil pressure? If filter is old and dirty fluid needs to warm to be thin enough to get enough volume to valve train. If oil pump is getting weak it will not pump sufficient fluid to valves at low RPM. First change oil and filter. After that make sure pressure is in spec's.

Jan 26, 2009 | 2002 Chrysler Concorde

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