Question about 1981 Ford F 150

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I just adjusted the valves on a 300 -6cyl. ford. As the compression is now good I hear now a distinct tapping noise. How can I fix this? Thanks.

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These are hydraulic velves so how did you adjuist them??

Posted on Oct 08, 2009

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  • Master
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It sounds like either you have missed 1 tappet and its looser than the others OR you have done 1 up to tight and its hitting the piston . but you can tell the differance between the two the loose tappet is a tick tick and a valve on the piston in a differant sound as its a metal valve hitting a alloy piston ,,so repair it now dont leave it..

Posted on Oct 08, 2009

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1 Answer

Possible loud valve tap with engine under load only. adjusted valves still tapping


The tapping noise will most probably detonation in the engine . It occurs under load or acceleration and happens when the air /fuel ratio is incorrect allowing the mixture to combust with out spark. The noise is the piston hitting the cylinder hard on the compression stroke. Possible damage is broken rings and melted pistons.. Run fault codes and fix failed sensors or adjust the timing for the fuel octane rating you are using. Check for vacuum leaks on all hoses.

Nov 03, 2013 | Cars & Trucks

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How to change lifters on a 2000 dodge interpid i is making tapping noises


Hi, If you hear tapping. It could be the valves need to be reset or adjusted. Good luck.

Sep 15, 2011 | 2000 Dodge Intrepid

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99 grand cherokee with 4.7l cylinder 8 misfire. changed plugs, coil pack a few times, still tapping away. exhaust doesnt smell rich. alittle bit of oil on the plug though...


Hi, when you say tapping--you mean the cylinder is making a tapping noise? If yes, that is a bad lifter/lash adjuster that is not allowing the valve to open fully. This will cause a misfire, but even if it didn't, it would soon wear out the can lobe and then require a major repair.
If it's not tapping, please see my tip at http://www.fixya.com/cars/r6715318-causes_gasoline_engine_misfires . These are generic instructions. If you get stuck or need specific instructions for your car, please get back to me.

Jan 22, 2011 | 2002 Jeep Grand Cherokee

1 Answer

04 FORD F150 5.4L TRITON,NOISE IN ENGINE( TAPPING)REPLACED CAM PHASERS & TIMING CHAIN KIT ALREADY A TAPPING NOISE IS STILL PRESENT,PUT MOTORCRAFT OIL FILTER USED CASTRO OIL ADDED LUCAS OIL TREATMENT...


there is also a small valve body you are supposed to replace when replaceing the phasers... also there is a ssm for replacing the valve lash adjusters. alot of time the small engine tick you hear can be a cracked exhaust manifold too so checking those really close is heavily advised because the cracks are really hard to see sometimes. i have seen broken push rods on these engines and they can be a pain to pinpoint where the noise is comming from. hope this helps

Jan 18, 2011 | Ford Fairmont Cars & Trucks

2 Answers

How do I tighten the valves down? its making a


Ford valves are not adjustable, something is wrong. There are oversized pushrods that can be installed, but something is wrong to have valve noise, unless they backed off, somehow.

Nov 02, 2010 | 1998 Ford Explorer

1 Answer

I put timing belt on 1989 mitsubishi mightymax and timing marks seem to all line up just seems like the camshaft mark is off by one tooth so i moved it that one tooth and started it up and and u can hear...


the tapping is probably a rocker that isn't adjusted right. The valves will not hit the piston if you're off by one tooth, but the engine will not have much power. The piston is on compression when both valves are shut and the piston is moving up (the cams should be on their marks when the piston tops out on compression). Otherwise, if on exhaust stroke, the exhaust valve will be open until the piston reaches the top. Make sure you have adjusted the valves properly and that the engine has good power. You're doing pretty good so far...

Sep 06, 2010 | 1989 Mitsubishi Mighty Max

1 Answer

Just had timing belt and water pump done now the tapping noise has got worse. real loud on start up then it is a constant tapping. been told it could b valves needing adjusting. do u have any sugestions...


what type eng????most likely the valve push rods and lifters need changed......they are probably hydraulic and have "collapsed" over the years...hydraulic valves cannot be adjusted as such but could be needing tightened-but not likely...this i an expesive job and you may want to consider cutting your losses....good luck and hope this helps

Mar 16, 2010 | Ford Laser Cars & Trucks

2 Answers

I have a 98 Ford Expedition,The valves clatter when you accelerate in drive,ive put octane booster in gas,still clatters. is it possible that the egr valve is not opening correctly?if so ill check and the...


Yes i agree this is a egr problem can you put vacuum to the egr valve while it is running to see if the idle drops if it does then the valve itself is good .Then check the dpfe evr solenoids :)

Sep 30, 2009 | 1998 Ford Expedition

4 Answers

TAPPING IN VALVES


ENGINE CLICKING NOISES
A clicking or tapping noise that gets louder when you rev the engine is probably "tappet" or upper valvetrain noise caused by one of several things: low oil pressure, excessive valve lash, or worn or damaged parts.
First, check the engine dipstick to see if the oil level is low. If low, add oil to bring it back up to the full mark. Is the engine still noisy? Check your oil pressure. A low gauge reading (or oil warning light) would indicate a serious internal engine problem that is preventing normal oil pressure from reaching the upper valvetrain components. The cause might be a worn or damaged oil pump, a clogged oil pump pickup screen or a plugged up oil filter. Using too thick a viscosity of motor oil during cold weather can also slow down the flow of oil to the upper valvetrain, causing noise and wear.
COLLAPSED LIFTER NOISE
Worn, leaky or dirty lifters can also cause valvetrain noise. If oil delivery is restricted to the lifters (plugged oil galley or low oil pressure), the lifters won't "pump up" to take up the normal slack in the valvetrain. A "collapsed" lifter will then allow excessive valve lash and noise.
VALVE LASH NOISE
If you can rule out lubrication-related problems as a cause, the next step would be to remove the valve cover(s) and check valve lash. On older import engines, mechanical lifters require periodic valve lash adjustments (typically every 30,000 miles). Too much space between the tips of the rocker arms and valve stems can make the valvetrain noisy -- and possibly cause accelerated wear of both parts.
To measure (and adjust) valve lash, you need a feeler gauge. The gauge is slid between the tip of the valve stem and rocker arm (or the cam follower or the cam itself on overhead cam engines) when the piston is at top dead center (valve fully closed). Refer to a manual for the specified lash and adjustment procedure. Also, note whether the lash spec is for a hot or cold engine (this makes a big difference!).
On engines with hydraulic lifters, oil pressure pumps up the lifters when the engine is running to maintain zero lash in the valvetrain. This results in quiet operation. So if the rocker arms are clattering, it tells you something is amiss (bad lifter or worn or damaged parts) or the rocker arms need adjusting.

Let me know if you have any other questions.  Thanks for rating my response and for using FixYa!

May 28, 2009 | 1997 Ford Expedition

2 Answers

My friend just got a 1988 ford ranger  v6 2.9L and has a valve tap and was wondering what different kind of ways he could fix this


if its an ohv type the most common fault is that the oil ways to the rocker shafts become blocked
so get some flushing oil drain the oil and replace with the flushing oil and run for the time stayed on the can then Change to good quality oil and new filter
then remove the rocker covers and check and adjust the valve clearances
if its an ohc type its all hydraulic adjustment
you could try flushing as above but apart from that the only other way is to change the lifters and followers
hope this helps

Jan 07, 2009 | 1988 Ford Ranger

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