Question about 2001 Jeep Cherokee

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My 2002 jeep is tapping in the engine . could it be a valve adjustment issue?

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: 4.7 liter jeep motor making tappinf sound and motor is missing

sounds like the lifters losed prime! here is a little trick that ive learned add a half off quirt off transmission fluid to the oil to prime the lifter

Posted on Nov 30, 2008

Rebgagnon
  • 382 Answers

SOURCE: 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.

Posted on Jan 26, 2009

smartr10U
  • 1305 Answers

SOURCE: my valves are making a tapping noise do i need to adj. valves

Before adjusting the valves, 1. check the oil level 2. use an engine cleaner that you add to the oil (berryman's or equivalent) and run thru the engine for 30 minutes 3. change oil and filter 4 run and check for tappet noise. This may improve things without opening things up.

Posted on Jun 11, 2009

  • 491 Answers

SOURCE: valves are tapping in my 2002 jeep liberty sport

The cleaners such as rislone etc.....need to be left in and run in the engine for a few days to a few weeks. You can run two cans at once.
You can also run a thicker oil such as 15w40 to see if that helps.
If none of the above makes a difference you may have a blocked oil passage or a crack in a oil passage lowering oil pressure to the lifters.

If it is "lifters" and not just one lifter allowing to much clearance in the valve train you may indeed have a blockage or crack.
If it is just one it may be a mechanical lifter defect and it may need replacing.

The above assumes all oil changes were done on time with high quality oil.

The cheap cleaning method is 25% gas and 75% oil put into the crankcase and run that for 20 mins.

Posted on Oct 20, 2009

  • 563 Answers

SOURCE: Is valve adjustment a part of normal maitenance on Suzuki Esteem

When you hear some tapping, that's why you need -valve adjustments. At 137,000miles you probably need more than that to continue your trouble-free drives.

Posted on Nov 12, 2009

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I have a 2002 Toyota Corolla with a 1.8 Liter engine, a loud tapping noise and loss of power. Not a rod knocking noise, because it sounds too fast. The sound seems to be in the top of the engine. Please...


I googled this: but you probably need more information to veryify.
2002 toyota corolla with a 1.8 liter engine interference engine
I believe there is a strong possibility this is an interference engine, and something has slipped in the timing belt or the camshaft gear. The sound is probably a valve hitting a piston. Otherwise a spring
on a valve has broken and it too is hitting a piston. This may be less damaging to the engine, but the first scenario can easily destroy the engine. Do not drive it or start it untill you get it sorted out. hopefully, it is not too late. Good luck

Mar 27, 2015 | 2002 Toyota Corolla

1 Answer

Send the valve settings for a toyota 3L engine


Valve setting? Most engine valves have an automatic adjuster to self adjust the setting. You didn't say you had it apart. So, I'm thinking you have a dirty condition that would make the adjuster or valve tap. If so good additives just for both those conditions can restore the adjusting by cleaning and freeing the ailing parts. Try the link below for more info and needed product. Stops noisy engine valve tap in 10 minutes or free Add Driving ends tap

Nov 04, 2014 | 2007 Toyota Hilux 2.7

1 Answer

"How to adjust 1996 jeep 4.0l lifters?


more than likely u have a rocker arm assembly on the jeep and the lifters are not adjustable in the event you can adjust them pull the valve cover using a ratchet and short ext. with the engine to operating temp at normal idle turn the nut on top of the rocker clockwise untill you the engine change idle then turn the nut back to the left one quarter turn you should heear the engine smooth out at that point if it does not back the nut off another eighth a turn or so this will put the lifter within specs and it should not be tapping in the event it is you will need to install new lifters

May 30, 2014 | 1996 Jeep Grand Cherokee

1 Answer

Is there ANY other engine that will fit in a 2002 jeep liberty limited? 3.7L v6... need a whole new engine


3.7L EKG Powertec, engine. SOHC with roller followers,
did you check compression, or just P030x codes???????
and what if its just a stuck valve or collapsed lifter
why not ask for help in diagnosis?
compression bad? on one or more? cylinders, post #
pull the Valve covers, see if there are broken valve springs
or bad cam lobes, or lifter bad? (motion)
if it didnt burn oil , try rebuilt heads.?

ran for 12 years, so what is the mileage>? 300k?
Oil changes, at 5000 ?

the 3.7 may fit...says wiki.
warning, some engine blocks may NOT be same. (filter mounts, engine mounts) check first.
but you can find this at any engine builders web site. (google them)
ive swapped many and engine, even wrong engines.?grin
there are always choices, i always have and had spare cars.
so down time is never an issue for me.
but others yes. (rent a car is one option while fixing another)
1: if the block is bad get a short block.
2: if the heads are bad get yours rebuilt , or exchanged.
3: if you blew the engine to total destruction, pistons hit valves? (rare)
then get a used engine, or buy a rebuilt.
or pull yours and take it to any top machine shop and drop it off.
bingo, fixed and cheap too. no middle man, to rip you.

history.
The 3.7 liter PowerTech V-6 engine is, essentially, the 4.7 V-8 with two fewer cylinders.
then later, morphed to the Pentastar V6. (today's motor)
cast iron block, (lasts long time, easy to bore and rebuild)
no rubberband cam belts, real chain, drive.
2 valves per cyl. making head rebuilds fast and cheaper.
forged pistons, not cheap cast.
MOPAR is not POS.
ask engineer Brian Crothers

I run the 3.8L in my 08 JK.
its a real low tech, push rod motor. (ended in 2011)

id fix mine, if it failed
my guess is it is head failure, , so get the newer
rebuilds with pinned, valve guides and run it.




Jan 10, 2014 | 2002 Jeep Liberty

1 Answer

Its making sorta a tapping noise not really a knock, got good oil pressure not over heating its running good and the knock/tap is not getting any worse. Its sounds like its coming from the top end of the...


Could be a bad hydraulic lash adjuster. Use a mechanics stethoscope to find from which head it comes. Then you will have to remove the valve cover from that side (cold engine) and feel each adjuster if its spongy. They should all be hard. You will need to rotate the crankshaft with a socket on the balancer bolt to be sure that each valve is closed at a time.

Sep 25, 2013 | 2001 Jeep Grand Cherokee

1 Answer

2002 grand cherokee engine tapping loudly


My first guess would be a failing valve lifter. They can become weak with age and not able to hold oil pressure.
Especially in an engine with that many miles on the clock.
If the noise is constant you may be able to find out which cylinder by running a compression test. maybe.

Apr 08, 2013 | 1997 Jeep Grand Cherokee

2 Answers

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

2 Answers

My valves are making a tapping noise do i need to adj. valves


Before adjusting the valves, 1. check the oil level 2. use an engine cleaner that you add to the oil (berryman's or equivalent) and run thru the engine for 30 minutes 3. change oil and filter 4 run and check for tappet noise. This may improve things without opening things up.

Jun 11, 2009 | 1990 Jeep Cherokee Limited

1 Answer

4.7 liter jeep motor making tappinf sound and motor is missing


sounds like the lifters losed prime! here is a little trick that ive learned add a half off quirt off transmission fluid to the oil to prime the lifter

Nov 30, 2008 | 2002 Jeep Grand Cherokee

1 Answer

Tapping noise


The first Zetec engine appeared in 1992, powering the fourth generation of the European Ford Escort and Orion. It was codenamed as the "Zeta" engine before Italian car maker Lancia threatened to sue Ford for trademark infringement as it already owned the name. Ford hurriedly renamed the engine "Zetec".

Early versions of the engine (prior to mid 1998) came complete with self-adjusting hydraulic valves. This helped prevent the notorious valve tapping (on the CVH) but caused other issues. The biggest problem was that a special Ford formulation of oil was required otherwise the valves tended to stick. Similarly, failure to regularly rev the engine above 4000 rpm also led to valve sticking. For these reasons, conventional tappets with shims were introduced in 1998.
Hope this shed some light on you r deli ma Let me know MrRodneyLong@gmail.com

Jul 03, 2008 | 1997 Ford Escort

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