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Need timing marks for 2002 ford explorer 4.0 engine. trying 2 check timing chain. any one know specs

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There are no marks on this one. There is a special tool set to align camshafts ($900). The best you can do is to bring #1 cyl to TDC compression with both cam(valve) covers off. #5 cyl should have lobes at equal opening, exhaust just closing and intake just opening.. #1 cyl cam lobes should each be diametrically opposed to the positions of #5. If cams need to be moved, there is no registration of gear onto cam. Just loosen bolt holding gear and move cam. Retighten bolt. Roll thru 2 crank revolutions and check cam timing again.Simple.

Posted on Jul 24, 2009

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On 2002 ford explorer,4.6-v-8, when i was changing timing chain guides and adjusters the chains jumped teeth on the crankshaft. The manual says the left camshaft timing mark should be approx. @ 11:oo & the...


Look for some Youtube videos on this repair. If I remember correctly the links on this chain have different color metal for the spots that the cam tooth goes against. When each side is in the proper tooth the right and left colored links will be on the cam mark and the crank mark should be on the timing TDC mark. Sounds like the slack you describe is wrong and a tooth is off because the tensioner is allowing slack.. You need to slip a tooth one way or the other until the tensioner has room to be in a neutral position.

Mar 10, 2017 | 2002 Ford Explorer

2 Answers

What are the timing chain marks on a 98 ford explore


zjlimited_1748.jpg

Fig. 19: Timing chain alignment - 4.0L engine (click image for zoom)

Hope this helps.

Aug 18, 2011 | 1998 Ford Explorer

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.


Dec 20, 2010 | 2003 Ford Explorer

2 Answers

1998 Explorer: how do i fix the timing belt...


Remove your radiator, water pump, and anything else blocking the front of the engine. remove the timing belt cover and there is the belt. The best advice I can give on exact specs is to purchase a Haynes manual. It will give exact specs on lining up timing marks, resetting the timing, and torque specs of all things involved

May 17, 2010 | 1998 Ford Explorer

2 Answers

Need timing chain marks for 2002 ford explorer 4.0 lit


just need to know what kind of tools to use?

Mar 23, 2010 | 2002 Ford Explorer

2 Answers

Need timing marks for 2002 ford explorer 4.0 engine. trying 2 check timing chain. any one know specs





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.

Jul 24, 2009 | 1997 Ford F150 Regular Cab

1 Answer

I replaced timing chains,guides and sprockets. how do i ensure correct timing .motor is 4.0 v-6 sohc.4wheel drive 99 explorer


make sure that the witness marks on the cam and the crank are in sync with each other. then check for tdc on #1 and check the rotor position relative to #1 on the distributor and see if it mates. time the engine per the factory spec. the haynes manual will tell you all that if you get one from the parts store.

Jul 19, 2009 | 1999 Ford Explorer

1 Answer

Need timing marks for 2002 ford explorer 4.6l engine. replacing timing chain.


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.

May 18, 2009 | 1997 Ford F150 Regular Cab

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