XK-8 Coupe (X100) V8-4.0L (AJ27) (1999)
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To simplify the installation of the tensioner on the engine, a clip (shown in Illustration 2) is provided to hold the piston in a partly compressed
position during assembly.
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When the piston and spring assembly is compressed to approximately half of its travel, the pin end of the clip is inserted into the hole in the tensioner
body, in front of the piston head/slipper, with the finger ring of the clip positioned at the rear of the head, (as shown in Illustration 1).
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Installation of the tensioners is covered in JTIS 5, section 303-01, Basic Engine, Removal and Installation, Timing Chain Tensioner (Secondary) -
A-Bank (12.65.63) or Timing Chain Tensioner (Secondary;) - B-Bank (12.65.64).
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The method of removing and reinstalling the secondary timing chain tensioners has been simplified by the use of a ball-end drive bit as described in
Technical Bulletin 303-28, dated 8/98.
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The installation of the revised tensioner, (1, Illustration 3), is the same as the original style tensioner except that it must be installed in the
compressed condition (retained by the clip).
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The retaining bolts should be tightened to the recommended torque setting of 10-14 Nm (7.4 - 10.3 lb. ft, 88.5 - 123.9 lb. in.), (2, Illustration 3),
before the clip (3, Illustration 3), is removed to release the piston and tension the secondary chain.
Note:
After installing a revised tensioner and removing the clip, save the clip as a service tool to assist in any future removal and reinstallation. To avoid
the loss of the clip inside the timing cover, attach a length of string to assist retrieval.
Parts Information:
