Volvo MD5A, Workshop Manual

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Replacing valve guides
45.
The valve guides must be replaced if there is too much
play between the valve stem and the valve guide. (See
technical data.) Press out the valve guides with tool 884538.
Nozzle sleeve
47. Remove the injector sleeve with tool 884541. Insert the
expanding screw in the nozzle sleeve and screw anti-clock-
wise until the screw has expanded and gripped the sleeve.
Tighten hard so that the threads bite into the copper. Fit the
yoke onto the studs which hold the nozzle. Screw on the nut
and tighten until the sleeve is removed.
46. New valve guides are fitted with tool 884549. Use a
press. This tool gives the guide the right height above the
cylinder head’s valve spring seat surface. Check the dimen-
sion “A” - this must be 9 mm (0,3543 in.) when the guide is
pressed into place.
48. Remove the 0-ring which provides a seal between the
sleeve and the cylinder head. Clean carefully and dry with
compressed air and then dip the new 0-ring in a soap
solution to facilitate assembly. Lubricate and fit the new
nozzle sleeve with tool 884557. Knock in the sleeve until it
reaches bottom.
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