Ford Thunderbird Manual page 16

03-oo- 15
SERVICE PROCEDURES {Continued)
Camshaft End Play
CAUTION: Prying against the camshaft sprocket
(6256) with the valve train load on the camshaft
(6250) can break or damage the camshaft
sprocket. Therefore the rocker arm adjusting
nuts (if equipped) must be backed off, or the
rocker arm (6564) must be loosened enough to
free the camshaft. After checking the camshaft
end play, adjust the valve clearance.
3.8L engine
1. Push camshaft toward rear of engine. Install Dial
Indicator with Bracketry TOOL -420 1-C or
equivalent so indicator point is on camshaft
sprocket bolt.
2. Zero the dial indicator. Pull camshaft forward and
release it. Compare dial indicator reading with
specifications. If end play is excessive, replace
camshaft thrust plate (6269).
Remove dial indicator.
3.
4. After replacing camshaft thrust plate, check end
play again. If it is still out of specified range,
inspect camshaft and cylinder head (6049) I
cylinder blocks (60 1 0) for excessive wear.
4.6L Engine
1. NOTE: Dial indicator may also be installed on rear
of engine with indicator point placed on flat area
of camshaft end.
Push camshaft toward rear of engine. Install Dial
Indicator with Bracketry TOOL -420 1-C or
equivalent so indicator point is on camshaft
sprocket bolt.
Engine-Service
Zero the dial indicator. Pull camshaft forward and
2.
release it. Compare dial indicator reading with
specifications. If end play is too tight, check for
binding or foreign material in camshaft thrust
plate. If end play is excessive, check for worn
camshaft thrust plate and replace cylinder head
as required.
3. Remove dial indicator.
Crankshaft End Play
1. Install crankshaft (6303) into cylinder blocks
(6010) as described in Section 03-01A (3.8L) or
A15376-C
Section 03-Q1B (4.6L).
2. Pry crankshaft toward rear of engine.
3. Install Dial Indicator with Bracketry TOOL-4201-C
or equivalent so contact point rests against
crankshaft flange and indicator axis is parallel to
crankshaft axis.
NOTE: P RY CRANKSHAFT IN
DIRECTION OF ARROWS AND
NOTE TOTAL END P LAY
PRYBAR
AA1008-A
1997 Thunderbird, Cougar July 1 996
03-oo- 15