1991 1999 ford explorer chilton User Manual

							A close-up view of a homemade holding clip ...HOW TO USE THIS BOOK
394 REMOVAL & INSTALLATION 
						

							... and its proper positioning on the tensioner
Remove the lower tensioner bolt and install a holding clip in the bolt hole and the slot on the rubbing
block.
6. 
Unbolt and remove the tensioner. Remove the camshaft sprocket bolt and sprocket retaining key.
7.  HOW TO USE THIS BOOK
REMOVAL & INSTALLATION 395 
						

							Loosen the camshaft sprocket bolt ...HOW TO USE THIS BOOK
396 REMOVAL & INSTALLATION 
						

							... then remove it
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REMOVAL & INSTALLATION 397 
						

							Remove the camshaft sprocket and chain
Remove the camshaft and crankshaft sprockets with the timing chain.
8. 
If necessary, unbolt the chain guide attaching bolts ...HOW TO USE THIS BOOK
398 REMOVAL & INSTALLATION 
						

							... and remove the guide from the engine
To remove the crankshaft sprocket, use a chisel to loosen the keyway ...
... then remove the keyway from the crankshaft Click to enlarge
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REMOVAL & INSTALLATION 399 
						

							Using a jawed puller, tighten the center bolt ...HOW TO USE THIS BOOK
400 REMOVAL & INSTALLATION 
						

							... and pull the crankshaft sprocket from the engine
If necessary, remove the chain guide.
9. 
To install: Install the timing chain guide. Make sure the pin of the guide is in the hole in the block. Tighten the
bolts to 84-96 inch lbs.
10. 
Align the timing marks on the crankshaft and camshaft sprockets and install the sprockets and chain.
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REMOVAL & INSTALLATION 401 
						

							Timing chain alignment-4.0L engine
Click to enlarge
Install the camshaft sprocket bolt and sprocket retaining key. Make sure that the timing marks are still
aligned.
12. 
Install the tensioner with the clip in place to keep it retracted.
13. 
Install the crankshaft key. Make sure the timing marks are still aligned.
14. 
Make sure the tensioner side of the chain is held inward and the other side is straight and tight.
15. 
Install the camshaft sprocket bolt and tighten it to 50 ft. lbs.
16. 
Remove the tensioner clip.
17. 
Check camshaft end-play.
18. 
Install the front cover.
19. 
Install the radiator.
20. 
Fill the cooling system.
21. 
Fill the crankcase to the proper level. Connect the negative battery cable. Start engine check for leaks
and roadtest the vehicle for proper operation.
22. 
4.0L SOHC Engine (VIN E)
On the 4.0L SOHC engine, there are four chains which are used to time the camshafts and balance the engine.
There is a jackshaft mounted in the middle of the engine block. The two camshafts are connected to the
jackshaft by two chains. The jackshaft is connected to the crankshaft by a third chain. Also, a balance shaft
assembly is chain driven off of the crankshaft and timed to the rotation of the engine.
In order to remove either of the camshaft timing or balance shaft chains, the jack shaft chain and sprockets
must first be removed. Once the jackshaft chain is removed, the left-hand camshaft and the balance shaft
chain can be serviced. In order to remove the right-hand camshaft chain, the jackshaft must be removed.
Additionally, in order to service either camshaft chain assembly, the cylinder heads must be removed. HOW TO USE THIS BOOK
402 REMOVAL & INSTALLATION 
						

							
According to the manufacturer, the engine must be removed in order to service the timing chain and
sprocket assemblies.
Remove the engine from the vehicle.
1. 
Remove the oil pan and ladder frame.
2. 
For ladder frame removal procedures, refer to the oil pump removal and installation procedure in this
section.
Remove the front cover attaching bolts and remove the cover.
3. 
Remove the cylinder heads
4. 
Install a pin into the jackshaft chain tensioner (arrow)HOW TO USE THIS BOOK
REMOVAL & INSTALLATION 403