Question about 2002 Ford Explorer

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2002 ford explorer 4.0 sohc racheting engine noise l/f changes with rpm. i understand this could be timing chain guide. im fixing car for friend who had stroke and family need car for his transportation. need to know if you can just change l/f guide or should all be replaced, can this be left alone and run for long time with noise or will engine fail completely. just checking options. any info would be appriaciated. Thanks Rich p/s i am a gm mechanic, not familiar with ford

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If it sounds bad. I wouldn't recommend driving it. If you have a bad guide. It would be best to replace all timing components. You don't want to get stranded on the road.

Posted on Apr 22, 2017

  • Adam alvarez Apr 22, 2017

    If it sounds bad. I wouldn't recommend driving it. If you have a bad guide. It would be best to replace all timing components. You don't want to get stranded on the road.

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SOURCE: 1997 ford explorer 4.0 sohc how to set timing

There are no timing marks. Timing is done using special tools to hold the crank at top center and a tool to hold each camshaft in position. the cam sprockets are not pinned to the cams. there are also dummy tensioners installed to take up the slack till the tightening is done. Also there are chains at the back of the motor that can only be timed with the motor out of vehical.

Posted on Feb 21, 2009

  • 1348 Answers

SOURCE: 2001 Ford Explorer 4.0 SOHC no timing marks on cam or chain

get a haynes manual and look up camshaft replacement..its worth the 30 bucks

Posted on May 14, 2009

moparownr
  • 667 Answers

SOURCE: need timing marks for 2002 ford explorer 4.6l

If you can not find a Haynes or Chilton Manual for sale in your local parts store, you should check your local library, they may have the manual or repair (shop) manual that you can copy pages from for your use. This way you will have pictures.

Posted on May 19, 2009

  • 1596 Answers

SOURCE: Need timing marks for 2002 ford explorer 4.0




The Info I Have Is Extensive and Has Illistrations, I Need to Emali it to You As it is Very Large, This Is A Small Example Im @rejakwilson@aol.com

Special Tool(s)

  1. With the vehicle in neutral, position it on a hoist.
  2. Remove the intake manifold.
  3. Remove the fuel supply manifold.
  4. Remove the accessory drive belt.
  5. Remove the thermostat housing.
  6. Remove the roller followers.
  7. NOTE: You must retime the LH and RH camshafts when either camshaft is disturbed. Turn the crankshaft clockwise to position the number one cylinder at top dead center (TDC).
  8. NOTE: Late build pulley shown, early build pulley similar. NOTE: The special tool must be installed on the damper and should contact the engine block to position the engine at TDC.

Posted on Jul 24, 2009

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What can cause the timing chain to jump time on an 05 ford explorer


The 4.0l sohc v6 is notorious for breaking the plastic chain guides. You will need t remove the engine to repair it properly and there are lots of special tools required to properly time the vehicle. There are actually 4 timing chains and I suggest replacing all 4 and their respective guides and tensioners.

Jul 27, 2015 | Cars & Trucks

1 Answer

Setting of timing chains


Get Ford timing tool kit, part = otc-6488 (For about $119 USD on eBay)

4 timing chains (3 front including the optional balance shaft chain + 1 back)

2 cam guides (1 front + 1 back)

2 oil tensioners (1 front + 1 back)

1 jackshaft tensioner (1 front)

1 jackshaft guide/cassette (1 front)

1 balance shaft tensioner (1 front) (will probably be ok, so dont replace it)

1 balance shaft guide (1 front) (will probably be ok, so dont replace it)

new sprockets + bolts + gaskets etc.

new spark plugs + throttle body cleaner + lithium grease spray + oil change

head gaskets


some of these parts (the front stuff) can be obtained as a primary timing chain rattle noise kit Part# = 2u3e-6d256-** ab for 4*4 & bb for 2*4.

The kits also have later part numbers for us$ 76 @ http://www.fordpartsonline.com


My parts order (without the balance shaft stuff) was:

$76.04 KIT-TENSIONER TIMING 2u3e-6d256-ab

$47.93 Engine, Camshaft and timing, Timing chain, TIMING CHAIN, Explorer, Mountaineer, Rear - 4.0L SOHC - 4.0L SOHC

$57.36 Engine, Camshaft and timing, Chain guide, CHAIN GUIDE, Explorer, Mountaineer, Jackshaft To Cam - 4.0L SOHC - 4.0L SOHC

$103.22 Engine, Overhaul gasket set, OVERHAUL GASKET SET, Explorer, Mountaineer, Upper (Valve Grind) - 4.0L SOHC - 4.0L SOHC

$28.93 Engine, Camshaft and timing, Tensioner, TENSIONER, Explorer, Mountaineer, Upper - 4.0L SOHC - 4.0L SOHC

Its worth mentioning that this procedure is not enjoyable at all and should be undertaken with at least 8 full days to completion (I recon you could do it in half the time the second time).

It is basically on entire engine re-build with both heads off and the engine out of the vehicle.

It is not possible to do the rear chain or sprocket with the engine in the car as the flywheel needs to come off + at least 1 head, but it is possible to do the front primary chain and or front cam chain with the engine in the car.

You will be a ford exploder and timing expert after you do this - the main reason should be the love of your American built vehicle. Its a solid car - except for the plastic guides!

Disclaimer Note: This is how i successfully did the job, but i am not a ford mechanic and don't hold me responsible if this does not work for you.
Timing Overview

A Small Sprocket on the crank turns a larger (2 to 1 ratio) jackshaft sprocket that is in turn connected front & back to the 2 camshafts.

Thus a 360o turn of the crank will turn both the camshafts 180o.

Firing order is 1-4 2-5 3-6, Right side numbers 1,2,3. Left Side = 4,5,6.

At TDC pistons 1 & 5 are fully raised, thus 1 is about to spark & 5 is evacuated.

The engine will turn freely (no piston to valve contact) with the cams 180o out, it will even run (roughly) with 1 out 180o, any other settings may cause major damage to the valves.

The 2 cam shafts come with timing markings, "yes" real timing marks that anyone can use (even without special tools) to ensure correct timing.

The way to time it is to ensure both the off centre cam shaft slits are level/flat with the head.

With the engine at TDC both the cams need to have the off centre slot in the same position either up and level or down and level.

It is super critical that both the camshafts are 100% in sink with each other, i.e. not a few degrees off, the engine computer can compensate for crank timing but not engineering failure.

Be warned the camshafts can turn easily fast & hard by themselves as a few springs are compressed at TDC, I got my finger jammed and its still healing + if the engine is not at TDC you may damage a valve.

Now heres the hard thing that you will need special tools for - if you need to change the timing, you will need to be able to undo the cam sprocket bolt on both cams & these are done up real tight.

There is a tool that you attach that has 2 pencil thick shafts that fit into the sprocket and prevent it from turning - then you need to put about 90Nm of force on the bolt (remember the rear one if LHT)

For the $money$, its well worth getting yourself the tool kit - it will save you hours in the long run. Search eBay for otc-6488 should be US $119 - then sell them again for say $100.

There is also a tool version of the oil tensioner in the kit that screws right in and puts the correct amount of force on the chain + guide, to enable you to do up the cam bolt with the chain and sprocket in the right spot on the cam.


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1997 Explorer - 4.0 SOHC v6 engine knocking noise


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the dots line up at top dead center(point to each other) and you wound have a harmonic balancer.

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You have a 4.0L SOHC engine which has 4 timing chains. No belts. The only thing you have to worry about is the chain tensioners breaking. You'll get engine noise at idle from underneath or it'll sound like pinging at 2200 to 2700 rpms.

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1 Answer

1997 Ford Explorer SOHC. timing chains


The front of the motor has to be removed to access the chains and guides [which may have broken] This can be done without removing the engine, but there are special tools needed to set the chain timing and also for removal of the crank dampner. It is not an easy task.

Feb 20, 2009 | 1997 Ford Explorer AWD

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