B3.9 and B5.9 Series Engines
Camshaft Gear (Camshaft Removed) (001-013)
Section 1 - Cylinder Block - Group 01
The camshaft gear will be permanently distorted if over-
heated. The oven temperature should never exceed
Heat the camshaft gear for nonbolted 1991 camshafts in
an oven at 149C [300F] for 45 minutes.
Heat the camshaft gear for bolted 1991 camshafts (steel
gear) and all 1994 automotive to 177C [350F].
Wear protective gloves to prevent personal injury when
handling parts that have been heated.
Install the camshaft gear with the timing marks away from
To prevent engine damage, the timing marks and gear
part numbers must be facing away from the camshaft
when the gear is installed. Keep the camshaft in a ver-
tical position with the gear up until the gear has cooled.
Do not use water to reduce the cooling time. Using
water can crack the gear.
NOTE: The gear must be installed within 30 minutes after
it is removed from the oven.
Remove the gear from the oven. Align the keyway in the
gear with the dowel pin in the camshaft; install the gear on
the camshaft. Make sure the gear is seated against the
NOTE: Be sure the gear is seated against camshaft shoul-
Using a 0.001-inch feeler gauge, check to see if the feeler
gauge can be inserted between the camshaft gear and the
shoulder on the camshaft. If the feeler gauge can be in-
serted, the camshaft gear is not properly seated.