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.
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REMOVAL & INSTALLATION 395 

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

... then remove it
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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...

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