03-oo-7
Engine-Service
03-oo-7
SERVICE PROCEDURES (Continued)
•
distributor 0-ring
•
oil level indicator tube connection
•
oil pressure sensor (9278)
Under Engine-With Vehicle on Hoist
•
oil pan gaskets (67 10) (4.6L engine)
•
oil pan sealer (3.8L engine)
•
oil pan rear seal (6723) (3.8L engine)
•
engine front cover gasket
•
crankshaft front seal (6700)
•
crankshaft rear oil seal (6701)
•
·crankshaft main bearing cap side bolts
•
oil pump and filter body (3.8L engine)
Compression Test
Compression Gauge Check
1 . Make sure oil in crankcase is of the correct
viscosity and at proper level and battery ( 1 0655)
is properly charged. Operate vehicle until engine
is at normal operating temperature. Turn ignition
switch to the OFF position, then remove all spark
plugs (1 2405).
2.
Install a compression gauge such as Rotunda
Compression Tester 01 4-Q0707 or equivalent in
No. 1 cylinder.
With Transmission and Flywheel Removed
NOTE: Air leakage in area around a crankshaft rear oil
seal does not necessarily indicate a crankshaft rear oil
seal leak. However, if no other cause can be found for
oil leakage, assume that crankshaft rear oil seal is the
cause of the oil leak.
NOTE: Light foaming equally around valve cover bolts
and crankshaft seals is not detrimental and no
corrections are required.
•
crankshaft rear oil seal
•
rear main bearing cap parting line
•
rear main bearing cap and seals
•
flywheel mounting bolt holes (with flywheel (6375)
installed)
•
camshaft rear bearing covers (6266) and or pipe
plugs at the end of oil passages
Oil leaks at crimped seams in sheet metal parts and
cracks in cast or stamped parts can be detected when
pressurizing the crankcase.
3.
Install an auxiliary starter switch in starting
circuit. With ignition switch in the OFF position,
and using auxiliary starter switch, crank engine a
minimum of five compression strokes and record
highest reading. Note the approximate number of
compression strokes required to obtain the
highest reading.
4.
Repeat test on each cylinder, cranking the engine
approximately the same number of compression
strokes.
Test Results
The indicated compression pressures are considered
within specification
if
the lowest reading cylinder is
within 75 percent of the highest reading. Refer to the
Compression Pressure Limit Chart.
COMP RESSION P RESSURE LIMIT CHART
Maximum
PSI
924 kPa
( 1 34 PSI)
938 kPa
( 1 36 PSI)
952 kPa
( 1 38 PSI)
965 kPa
(140 PSI)
979 kPa
( 1 42 PSI)
933 kPa
( 144 PSI)
1007 kPa
(146PSI)
1020kPa
( 1 48 PSI)
(Continued)
Minimum
PSI
696 kPa
( 1 0 1 PSI)
703 kPa
(102 PSI)
7 1 7 kPa
(104 PSI)
724kPa
(106 PSI)
738kPa
(107 PSI)
745 kPa
(109 PSI)
758kPa
( 1 10 PSI)
765 kPa
( 1 1 1 PSI)
Maximum
Minimum
PSI
PSI
1 1 31 kPa
848 kPa
( 1 64 PSI)
(123 PSI)
1 145 kPa
855 kPa
(166 PSI)
( 1 24 PSI)
1 158 kPa
869 kPa
( 1 68 PSI)
( 1 26 PSI)
1 172 kPa
876 kPa
( 1 70 PSI)
( 127 PSI)
1 186 kPa
889 kPa
( 1 72 PSI)
( 1 29 PSI)
1200 kPa
903kPa
( 1 74 PSI)
( 1 3 1 PSI)
1 2 1 4 kPa
9 10 kPa
( 1 76 PSI)
( 1 32 PSI)
1227 kPa
9 1 7 kPa
( 1 78 PSI)
( 1 33 PSI)
Maximum
Minimum
Maximum
Minimum
PSI
PSI
PSI
PSI
1 338 kPa
1000 kPa
1 544 kPa
1 158 kPa
( 1 94 PSI)
( 1 46 PSI)
(224 PSI)
( 168 PSI)
1 35 1 kPa
1014 kPa
1558 kPa
1 165 kPa
(196 PSI)
( 147 PSI)
(226 PSI)
(169 PSI)
1 365 kPa
1020 kPa
1 572 kPa
1 1 79 kPa
( 1 98 PSI)
( 1 48 PSI)
(228 PSI)
( 1 7 1 PSI)
1 379 kPa
1034kPa
1586 kPa
1 186 kPa
(200 PSI)
( 1 50 PSI)
(230 PSI)
( 1 72 PSI)
1 303 kPa
1041 kPa
1600kPa
1 200 kPa
(202 PSI)
( 1 5 1 PSI)
(232 PSI)
( 1 74 PSI)
1 407 kPa
1055 kPa
1055 kPa
1 207 kPa
(204 PSI)
( 153 PSI)
( 153 PSI)
( 1 75 PSI)
1 420 kPa
1 062 kPa
1627 kPa
1 220 kPa
(206 PSI)
( 154 PSI)
( 1 54 PSI)
(177 PSI)
1 434 kPa
1075 kPa
1641 kPa
1 227 kPa
(208 PSI)
( 1 56 PSI)
(238PSI)
( 1 78 PSI)
1997 Thunderbird, Cougar July 1 996