Cub Cadet Challenger 500, Service Manual

Page: 98 / 244

Engine
4 ‐ 11
Remove the valve guide:

This process is easier if the cylinder
head is heated to 212 degrees
Fahrenheit in an oven.
Install a new valve guide with a valve
guide installer (2) and removal (1) tool.
After installing, the valve guide needs to
be resized with a reamer of the correct size.
Install the new or refaced valve into the
head, apply a light coat of lapping
compound to the face of the valve. Turn
the valve until the valve face and the
valve seat are evenly polished.
Clean off all of the lapping compound and
install a new valve guide seal.
Install:

valve spring seats

valve springs

valve collars

valve spring keepers
Install the valve springs with the tight
windings toward the head.
Note:
Using a spring compressor (1) and
attachment (2), compress the spring,
apply a dab of lithium grease to the
keeper to help hold it in place above the
collar.
To secure the valve keeper onto the valve
stem after installed, lightly tap the valve tip
with a rubber hammer.