1991 1999 ford explorer chilton User Manual
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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 HOW TO USE THIS BOOK 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 HOW TO USE THIS BOOK 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. 11. HOW TO USE THIS BOOK 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