Question about 2003 Buick Century

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When started it sounds like a lifter is ratteling,can this be adjusted or what do I do.It quits after about three minutes.

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There is no adjustment I know of. Sounds like a minor problem that won't affect performance. You might try an additive to the oil (they market various products that claim to quiet lifter noise).

Posted on Mar 18, 2011

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How do i fix my 2001 740i bmw it makes a ticking sound win idleing


could possibly be a lifter tapping (Ticking) ,depending on how many miles the vehicle has on it might be time for lifters to be adjusted,most foreign overhead cam engines must have lifters adjuster periodically ,if you turn on the air its puts more of a load on the engine causing a louder sound (also check oil level an engine low on oil will start to tick too.. the more wear the engine gets the looser the lifters can get over time ,look in your service manual if you have one and see what the intervals are on lifter adjustment this can give you an idea.
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the ticking sound is coming from the top of the engine usually comes from under the vavle covers where the lifters are located,

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The 4.3 liter vortex uses a hydraulic lifter. There is no valve adjustment. If you hear a lifter tick than there is either a bad lifter or something broken in the valve train. Something yo can try for a sticky lifter is add 1/2 a can of seafoam motor tune the oil. Start the engine and let it run until the noise goes away. Then change the oil. If the noise doesn't go away than you have bigger issues. I have yet for the seafoam to not fix a sticky lifter especial in the 4.3 liter which we see quite often.

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It is most likely the valve lifters tapping. The lifters are hydraulic meaning they have to be pressurized with engine oil to correctly adjust the valves. Sometimes after an oil change one or more of the lifters can collapse (loose pressure). Usually this is not a problem, it will most likely re-pressurize and quite down after the engine runs for 10 to 15 minutes. Pay attention to the oil pressure, if your truck has a gauge if it reads between 30 to 50 PSI cold when running then you shouldn't need to worry.

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That sound is one or more valve lifter(s) that is out of adjustment or a clogged rod provided your oil level is correct and the oil is not overly used and dirty. If there are several valve lifters making noise I would tend to believe the oil pressure is too low which could be the oil pump failing.

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Are the valves adjustable?


hi, on your vehicle the valves are not adjustable after about 1990 they started using hydraulic lifters, so if you have top end engine rattle then the chances are these lifters will need replacing or worse case the cam lobes could be worn if this is the case then your going to need to do a top end rebuild.

to replace the hydraulic lifters your going to need to remove the cams so as you can get to the lifters under neath the cup they sit under so its quite a big job.

the older type valves were a lot easier as you could adjust them with screwdriver and measuring guages but they started using the new ones as they made less noise and lasted longer, but the downside to this was that you need to do more work to replace the lifters.

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Engine whine knock on cold start ups that last 4-5 minutes


It sounds like you have a lifter problem, Or you have low oil. it does it when you first start it up because it takes time for the oil to get into all the valves. try changing your oil and and adjusting you lifters that should fix your problem but don't hold me to it.

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I have a 1993 ford explorer with a 4.0. have replaced head gaskets and find that the hyd lifters are pumping up to the point they are keepeing the valves open. have changed lifters and have the same...


You are not letting them bleed down.

The lifters will stay "pumped" for some time after the engine is first started. Sometimes its so bad the engine won't start (if fully pumped). If the engine won't start, you can cycle the engine by hand and compress the valve springs and let it sit for a time and they will bleed down (a couple at a time then turn 1/4 turn or so and wait again), but the easiest way is to run the engine at zero lash and tighten the rockers to spec. (one CYLINDER at a time) and let the other cylinders run until the miss goes away. When the miss goes away that cylinder will be at adjusted zero and you can move to the next cylinder. The thinner the oil the faster it will stabilize (which means engine hot).

If the engine will start at adjusted (but pumped up) lash, just let it run. It could take up to 30 minutes for the lifters to leak down.

Lastly, you can pull the lifters out, remove the snap rings, remove the plungers and drain the oil. Reassemble the engine with "dry" lifters, adjust them static (engine off) then start the engine. After the engine warms up they should fill with oil and run normally.

If you don't know how to do any of this, you probably shouldn't be in there to begin with. If you adjust them incorrectly you can damage your engine.

Some engines have no adjustment and those you just have to wait to stabilize. If they won't start, you turn them by hand and let them bleed down.

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YOU NEED TO ISOLATE TICK TO FRONT OR REAR BANK OF ENGINE..A MECHANIC'S STETHOSCOPE CAN HELP YOU ISOLATE..THEN REMOVE FRONT OR REAR VALVE COVER AND PUSH ON EACH ROCKER ARM..IF A LASH ADJUSTER(LIFTER)IS BAD,IT WILL BE SOFT OR COMPRESS WHEN YOU PUSH ON IT..LIFTERS ARE IN ROCKER ARMS ON A 3.0L AND IN BLOCK ON 3.3 AND 3.8L ENGINES

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