REPAIR INSTRUCTIONS, PART 2
Page 379
A lifter that does not move freely in the lifter bore
can be impacted by the cam lobe during engine
operation. This will result in damage or breakage
of the ceramic roller.
3. Once all lifters have been trial-fit to their
respective bores and H-rings, label each
valve lifter and place on a clean work
surface until reassembly.
Camshaft Installation
General Instructions
Before installing a camshaft in any engine,
ensure that it is clean. Parts that are free of
dirt/contamination and are well-lubricated with
clean engine oil are essential for initial start-up
and run-in. If necessary, wash and brush the
camshaft in solvent and blow-dry with
compressed air. Also, check the camshaft for
possible handling burrs on the edges of journals
and lobes. Any minor burrs can be removed with
a fine stone.
Use camshaft guide tool J 41682 to ease
installation of the camshaft and avoid damage to
the camshaft bushings.
Procedure
Install the camshaft as follows:
In order to use the valve lifter tool to hold the
valve lifters in position, the cylinder heads must
be installed on the engine.
Check the condition of the valve lifters before
installing them. Replace any lifters that are
broken, damaged or show signs of excessive
wear. Arrange the valve lifters in the order
identified so that they can be reinstalled back into
the original location from which they were
removed.
Ceramic lifter rollers will not tolerate high impact
loads. Such loads can crack the ceramic,
resulting in breakage or spalling of the ceramic
roller. If damaged, cracks too small to detect may
be present and result in failure of the ceramic
roller. It is extremely important that a ceramic
roller lifter that has been subjected to high impact
or dropped not be used.
Pre-lubrication of the lifters is critical to provide
adequate break-in for new roller and roller axle
parts at initial engine start-up.
1. Submerge the valve lifters into a container of
clean engine oil to allow oil to fill the
passages to the roller axles. Remove each
lifter and while holding it vertically, spin the
roller to make sure the oil flows to the
surfaces between the axle and roller. This
step is important to provide adequate
break-in of the axle and roller at initial
start-up of new components.
2. Install a lifter into the lifter bore by aligning
the lifter flats with the H-ring flats. As the
lifter is seated, it should be possible to rotate
it slightly from left to right. Verify that all
lifters have complete freedom of movement
in the bore and H-rings in both the upward
and downward direction. Any sticky or tight
lifter conditions can be resolved by referring
to “LIFTER BORE CLEANING AND LIFTER
CHECKS” on page 189.
With the engine in the chassis, the valve lifters
must be held in the UP position, using tappet
holder J 37720-C in combination with J 42425.
3. As the lifter is installed, it must be held in
position by inserting a tappet holder into the
opening through the top of the cylinder head
and block. The tappet holder must be
positioned so that the magnetic head of the
tool holds the lifter in position. Check to see if
the tool has captured the valve lifter by
drawing upward on the tool. A resistance will
be felt that cannot be felt if the magnet has
contacted something other than a valve lifter.
5-111.bk Page 379 Monday, July 10, 2006 2:26 PM
Summary of Contents for ASET AC
Page 6: ...TABLE OF CONTENTS Page iii TABLE OF CONTENTS 5 111 bk Page iii Monday July 10 2006 2 26 PM...
Page 14: ...INTRODUCTION Page 1 INTRODUCTION 5 111 bk Page 1 Monday July 10 2006 2 26 PM...
Page 23: ...Page 10 NOTES 5 111 bk Page 10 Monday July 10 2006 2 26 PM...
Page 96: ...COMPONENT LOCATOR Page 83 COMPONENT LOCATOR 5 111 bk Page 83 Monday July 10 2006 2 26 PM...
Page 99: ...Page 86 NOTES 5 111 bk Page 86 Monday July 10 2006 2 26 PM...
Page 100: ...TROUBLESHOOTING Page 87 TROUBLESHOOTING 5 111 bk Page 87 Monday July 10 2006 2 26 PM...
Page 140: ...MAINTENANCE Page 127 MAINTENANCE 5 111 bk Page 127 Monday July 10 2006 2 26 PM...
Page 153: ...Page 140 NOTES 5 111 bk Page 140 Monday July 10 2006 2 26 PM...
Page 383: ...Page 370 NOTES 5 111 bk Page 370 Monday July 10 2006 2 26 PM...
Page 479: ...Page 466 NOTES 5 111 bk Page 466 Monday July 10 2006 2 26 PM...
Page 480: ...SPECIFICATIONS Page 467 SPECIFICATIONS 5 111 bk Page 467 Monday July 10 2006 2 26 PM...
Page 505: ...Page 492 NOTES 5 111 bk Page 492 Monday July 10 2006 2 26 PM...
Page 513: ...Page 500 NOTES 5 111 bk Page 500 Monday July 10 2006 2 26 PM...
Page 519: ...Page 506 NOTES 5 111 bk Page 506 Monday July 10 2006 2 26 PM...
Page 520: ...APPENDIX Page 507 APPENDIX 5 111 bk Page 507 Monday July 10 2006 2 26 PM...
Page 528: ...INDEX Page 515 INDEX Index fm Page 515 Monday July 10 2006 2 48 PM...
Page 535: ...Page 522 NOTES Index fm Page 522 Monday July 10 2006 2 48 PM...