03·01A·20
IN-VEHICLE SERVICE (Continued)
Head Gasket
CYLINDER BLOCK
6010
Engine, 3.8L
SEcnoN A
CYLINDER HEAD TO
BLOCK DOWEL
6A008
03·01A·20
NOTE: MUST BE BOTIOMED OUT
(FOR MANUAL OPERATIONS ONLY)
SECTION A
TYPICAL
TWO
PLACES
CYLINDER HEAD
TO BLOCK DOWEL
6A008
3. Position cylinder heads onto cylinder blocks.
2 REQ'D
4.
CAUTION: Always use new cylinder head
bolts to ensure a leak-tight assembly. Torque
retention with used bolts can vary, which
may result in coolant or compression
leakage at the cylinder head mating surface
area.
NOTE: When cylinder head retaining bolts have
been tightened using the following procedure, it is
not necessary to retighten bolts after extended
engine operation. However, bolts can be checked
for tightness if desired.
Tighten cylinder head retaining bolts in numerical
sequence in three steps as follows:
a. 20 N·m ( 1 5 1b-ft).
b. 40 N·m (30 lb-ft).
c. 50 N·m (37 lb-ft).
AA0866-A
d.
CAUTION:
Do
not loosen all of the bolts
at the same time; only work on one bolt
at a time or damage to engine or leakage
may occur.
Loosen retaining bolts one at a time two to
three revolutions and retighten as follows:
Long bolts:
•
Tighten to 4Q-50 N·m (3Q-37 1b-ft).
•
Rotate an additional 1 75-185 degrees.
•
Go to next bolt in sequence.
Short bolts:
•
Tighten to 2Q-30 N·m ( 1 5-22 1b-ft).
•
Rotate an additional 1 75-185 degrees.
•
Go to next bolt in sequence.
1 997 Thunderbird, Cougar July 1996
