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Is there a simple way to see if a 2004 jeep 4.0 jumped timing without stripping to the timing chain?

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  • Cars & Trucks Master
  • 14,585 Answers

You have a chain in it, not a belt. It hasn't jumped a tooth or two. Guides could be worn. It would throw a code. But it wouldn't jump. Whta's the problem?

Posted on Dec 03, 2014

Testimonial: "No, it was towed to a relatives house. The following week he tried to move it. He said it started, made a bunch of noise, drove about 15 feet and shut down. Surprisingly the rad is still full of coolant regardless."

  • 4 more comments 
  • Mustang_Guru
    Mustang_Guru Dec 03, 2014

    Was in accident and run with rad fan and shroud bashed into motor and it shut down. Now all of the broken parts have been removed but it's backfiring out the throttle body and won't start. No codes, no blown fuses.

  • Randy Ohler Dec 03, 2014

    Well this is a different story. Running the engine with NO cooling system can cause lots of problems. Everything gets way to hot. It warps . Heads, valves, rings get burnt, seals get burnt. Most likely heads. Most codes don't set without 3 to 5 minutes of running time..

  • Randy Ohler Dec 03, 2014

    Then the shut down could be from wires being cut from the accident. Ther noise also could be fromfas coming on because they are shorted.

  • Randy Ohler Dec 03, 2014

    Sorry, hit the enter button too soon. From fans coming on at key on. The noise really has to be isolated to find out what is really going on.

  • Mustang_Guru
    Mustang_Guru Dec 03, 2014

    The only wire cut is the electric fan which has no power until up to temp. If you can't answer the question please move on because you are not helping.

  • Mustang_Guru
    Mustang_Guru Dec 03, 2014

    Noise? Backfiring out throttle body and not starting is the problem. The only noise was when it was started before with the broken electric fan and shroud into the belt and accessories. Im thinking it jumped timing then. I know it's a chain I said that in first post. But an old stretched chain can jump if the engine or parts of it are bound up suddenly while running!

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Posted on Jan 02, 2017

JustJeeps
  • 74 Answers

SOURCE: 1995 jeep wrangle timing chain

to be safe !00k is good time for 4 cyl or earlier if used for towing

Posted on Nov 18, 2008

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How do i troubleshoot a transfer case problem?


When was the last time the 1995 transfer case was serviced? First change the oil, It is possible for the transfer chain to jump teeth when the tensioner is not adjusted correctly. Do not engage any 4WD functions until further investigation is done. Also disengage front hub locks(free). Never operate 4WD on pavement, Damage to drivetrain and premature tire wear will occur. Buy a Chilton manual for the Jeep for detailed maint. procedures. The transfer case is very expensive

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Is there a way to check the timing chain without removing the cover ( this is quite a job) for a look at the timing marks


no way of doing so. need to remove cover. i have been doing this since 1996 and have never seen chain driven nissan jump timing. have seen some timing belt cars jump, but never chain driven engines. i think you have something else going on. i have done many and many timing chain jobs on frontiers and maximas, but not for a timing chain jumping issue. upper timing chain shoes wear out and engine gets noisy. i have to say i have seen some with the primary chain stretched a bit, but car still ran fine.

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What happens when ur car jumps timing and what causes it?


A car with a timing belt will jump time for several reasons, the belt dries out and the teeth strip off the belt, the tensioner or guide wear and fail, the belt can stretch over the years causing it to jump the sprockets. A car with a timing chain can jump because many were made with cam gears that had plastic teeth and they wore out, or the gear was made out of a casting that wore out, or the chain stretched replacement cam gears were usually made out of steel. Bob Bristol Magic Collision


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How do you tell if an engine has jumped valve timing (not ignition timing)?


Essentially, since the valves and distributor are both driven by the camshaft (via the timing chain), both are equally affected by anything that happens to the chain. Chains don't actually "jump time"
but most often will stretch out and cause the cam and distributor to lag behind the crankshaft so the pistons are out of phase with them. That causes lower and lower actual compression and later and later spark, resulting in poor power output and in extreme cases, a piston can actually touch and bend a lagging valve. If an engine is fitted with an aluminum cam gear, the gear teeth are nylon. As the gear turns, an excessively worn chain will ride up and strip off the teeth.
The best way to check is to remove the valve cover and watch the rocker arms on #1 cylinder. Both valves should be completely closed when the engine is turned to the top dead center (0) position on the timing scale and the distributor rotor should point to the #1 tower on the distributor cap. (will also point exactly 180 degrees away from it if on the exhaust stroke)
Very low compression readings in all cylinders and a rotor that "stutters when the engine is cranking are other common symptoms)
If you have those symptoms, the next thing to do is remove the timing case cover and look at the chain. if the engine has 200K miles or better, I'd replace the chain, as at that point, most chains have sufficient wear to justify replacement even in engines that seem to be running well.
This answers your question but may not solve your problem as your post leads me to believe there is something other than a valve timing issue going on there.

Feb 08, 2011 | 1990 Jeep Wrangler

1 Answer

Suspect timing chain has jumped, is there a way to verify the timing marlks without taking off the lower cover(valve cover already off).


check compression. if its low (below 125psi) its most likeky jumped. Usually it wont sound normal when turning the engine over. it it has jumped, you will have bent valves. If any rocker arms are loose, you have bent valves.

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When do I have to replace my timing belt 4 cylinder 2004 manual honda accord?


On Honda Accord between 2002 - 2010 all they came with was an 2.4L engine, all have timing chain in them, no timing belt

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No hi gears making jumped chain noise/ 90's wrangler 5spd 4x4


There is pretty much nothing you can do without removing trans & transfer case to repair this (everything is inside). Your best option is likely to have a good trans shop look at it. As long as driveshafts are connected, the best you can do is take a long bar, broomstick etc and use it as a long "stethescope" to find the source of the noise.(without actually being under the vehicle where you may get injured if it decides to jump foreward.)

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NEED INSTRUCTIONS TO INSTALL A TIMING CHAIN


how about a timing belt!!! not easy keep in mind you should consider changing your water pump and cam shaft seal these are well known to go at 80-100 thou km it would be a shame to see you do all this work and a week or two later strip it all down again just to change a $6.00 seal or a water pump that is on the same drive as that timing belt!! you have a job on your hands do you have timing experience prior to your attempted? I just did mine!!I do you have a impact gun and finger pullers for crank shaft pulley removal a harmonic puller won't help you any! be sure to have your timing marks bang on the cam shaft gear and crank shaft pulley these valves will bend if it jumps!hope this helps.

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