XJ-S V12-5.3L (1982)
Heater Core: Service and Repair
Mark III
HEATER MATRIX - MARK III
RENEW
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With the air conditioning unit removed and located on a workbench, the heater matrix can be removed.
IMPORTANT: It is recommended that the positions of all the operating rods are marked with a scriber, or a similar method.
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Note and disconnect all the cables from the blower motor resistance unit (1) and the water valve temperature switch (2).
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Remove the screws securing the cable harness clip and the bracket (3).
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Remove the screws securing the vacuum pipe clips (4).
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Disengage the return springs from the operating levers (5), remove the screw securing the lower flap operating lever to flap hinge (6) and remove
the lever.
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Slacken the screw securing the operating rod from the vacuum servo to the flap operating lever on the matrix cover (7) and release the lever from
the rod.
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Remove the screws securing the matrix cover plate to the unit (8).
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Remove the screws securing the heater matrix pipes retaining bracket to unit and remove the bracket (9).
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Remove the pipe clips (10).
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With a straight pull, ease the matrix clear of the unit (11).
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Remove the sleeve from the top pipe, the cover plate and the water valve temperature switch from the lower pipe.