Question about 2002 Jeep Grand Cherokee

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Without warning I went out to start my Jeep and heard a loud ticking noise. My Brother-in-Law checked it out and said it would need a valve job but then the valve freed up and went quite again (no ticking). Five minutes later it got stuck again. Since I'm on disability income I just can't have it towed in to a shop without first know the average cost of a valve job or are there any additives that might help to free up the valve until I can save up some more money to have the work done? I still owe 5,000 on it so selling it is not an option and it only has 105,000 miles on it......

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  • n2lwc May 24, 2011

    What is "Engin Flush? Is there a certain name brand I should ask for at AutoZone. Someone told me to try doing an oil change with synthetic oil but replace the last quart wit Marvel Mystery Oil and it will most likely solve the problem...



  • n2lwc May 24, 2011

    Ok great. Thanks Ed, I will give it a try and let you know. It seems like it should work as I never had a problem with it before and it only has 105,000 miles on it. I was tied while recovery from spinal surgery so it was only started off & on for five minutes from late December to the beginning of April. I then drove it for about 120 miles it it ran great. The next day when I started it is when the loud ticking started so I'm hoping it was a carbon/sludge build up and this will solve the problem.

    Thanks again!



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Add a quart of engine flush to your oil and drive for about 20 miles then change the oil and add an additive for "sticky valves" Any auto store ( Pep Boys. AutoZone NAPA) will have these items

Posted on May 24, 2011

  • n2lwc May 24, 2011

    What is "Engin Flush? Is there a certain name brand I should ask for at AutoZone. Someone told me to try doing an oil change with synthetic oil but replace the last quart wit Marvel Mystery Oil and it will most likely solve the problem...



  • Ed Mac May 24, 2011

    Engine flush is a petroleum product that when added to your oil helps breakdown sludge, It thins the oil and allows contaminats to be suspended in the oil. Thats why its necessary to use then drain it.

    There are many brands on the market Slick 50 , Gunk, Gumout all make this type of product. Marvel Mystery oil is an addative that you leave in. That you would put in after the flush OR you can just try it first and see what happens
    Good Luck



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1 Answer

2006 cts 2.8 making loud ticking noise ,running rough and has misfire codes po300,301,303,305

codes p 300 is a random/ multiple misfire===causes spark plugs---HT leads ---injectors/s--ignition coil/s--low compression---wiring
codes p 301,303,305 are misfires detected for no 1,3 5 cylinders === causes listed are engine mechanical fault---wiring---ignition/fuel systems ---injectors---ECT/MAF sensors---ECM
You do not mention if this is a v6 engine in which case no 1,3 5 will be all in the one bank head
With the loud ticking noise that amounts to a mechanical fault associated with that bank
could be loose valve seat inserts , cam lobes failure or cam follower failure or hydraulic lifters problem even loose cam shaft bearings / caps
I would be inclined to remove the rocker cover and check for metal , loose bolts , excessive valve clearance before I went plugs etc
the main indicator for the answer is the loud ticking noise which indicates a valve train problem which will cause the rough running

Jan 15, 2016 | Cars & Trucks

1 Answer

Car started knocking really bad got a cylinder 2 misfire code after opening coolant bleed valve with enging hot

Okay, it may be due to overheating, that may be the noise you heard, lets hope. first allow engine to cool, open radiator cap or the resivoir cap, which ever is the fill, remove the bleeder at top hose and fill radiator slowly until coolant comes out bleeder.

note if water pump was replaced due to leaking and engine was overheated at that time then it may be a good idea to replace the thermostat .
after filling is done start engine and allow it to run. watch temperature if temp start to climb past half way shut engine down and let sit for 5min. then restart and check level, in res do not open cap . feel air from fan and see if it is getting hot, this may take up to a half hour but do not drive,

A few questions, does this jeep have an electric fan?
when you heard the knocking was engine temp hot?
If you start jeep cold does engine knock?
Did this jeep get a new thermostat with waterpump job?
did it overheat when pump went bad and why did water pump get replaced?

sorry for all the questions ,just trying to get all the info to help you .

Dec 25, 2012 | 2004 Jeep Grand Cherokee

1 Answer

I went over a pot hole then I heard a loud pop. Stopped and looked under my jeep and there was grease or something all over the inside of my wheel. What was it? Is this a serious problem? Service 4 wheel...

You might want to get all that checked out soon. The grease might be left over from a lube job. But the POP noise, you may have broke a hub or something. If it doesn't make a noise or doesn't wobble, it is not that serious. Make sure the front end is not making any weird or unusuall noises.

Feb 06, 2011 | 2005 Jeep Grand Cherokee

3 Answers

My jeep is making a very loud tic noise coming from the motor...does this mean my motor is gone? How much am I looking at fixing this problem

ticking can be a few problems that are not terminal first check oil if low top off and see if noise quiets down if oil good than have oil pressure checked -may be clogging or bad oil pump-check check where the ticking is coming from if its the head area than possible need to clean repair or replace a valve train part-[clogged push rod ,bad/need adjustment rocker sticking /bent valve oil return clogging /sludge] if coming from front of engine check the pulleys and water pump or fan for damage or debris a ticking noise usually is a noise that can be repaired just need to pinpoint the location

Jul 10, 2010 | 1999 Jeep Grand Cherokee

1 Answer

Loud ticking from engine

check your oil level immediately.

cant verify exactly without hearing it's most likely a valve tap and would need to be checked out at a shop.

If its a Deeper "thud" it could possibly be a rod knock or even a piston slap. regardless if your oil level is ok and the noise remains get it checked

May 13, 2010 | 2001 Jeep Cherokee

1 Answer

Hi i just put petrol in my subaru impreza 97 sport model as usual,and i started the car and i heard a loud bang noise coming from the exhaust the car made a loud ticking noise from the engine like a...


Dec 12, 2009 | 1997 Subaru Impreza

1 Answer

2004 Jeep Grand Cherokee makes a loud ticking noise, won't start.

Your problem is likely a bad battery and/or corrosion on the battery terminals. Remove the cables from the battery terminals and clean them with a wire brush or other tool. NOTE: always remove the negative cable first and reconnect it last. Reconnect the cables and then try to start/jump the vehicle again. If that doesn't clear the problem, take the battery to your local auto parts store or supplier and have them check it. You will probably need a new one.

Oct 26, 2009 | 2004 Jeep Grand Cherokee

6 Answers

A loud ticking noise?

No I would not chase to the pistons, these vehicle were very comon in creating HLA noise hydraulic lash adjusting valves, meaning the valves pump up with oil as the oil gets thinner they dont pump up as fast and create a very loud ticking noise, I would not express a great concern over simplicity, dodge was famous for this, they really were.

Oct 22, 2009 | 2000 Jeep Grand Cherokee

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