Cylinder Head
Installation
!
CAUTION
Removal
DO NOT use sealer on head gaskets.
1.
2.
Drain engine cooling system.
Remove as outlined:
1.
2.
Place head gasket in position over dowel pins.
Carefully set cylinder head in place over dowel
pins.
a. Exhaust manifolds.
b. Intake manifold.
3.
Coat threads of head bolts with Quicksilver Per-
fect Seal and install finger-tight.
c. Rocker arm covers.
d. Rocker arm assemblies and push rods (keep
in order for reassembly in their original loca-
tions).
4. To insure gasket sealing, torque head bolts in
three steps, following torque sequence for each
step. Start first step at 20 lb. ft. (27 N·m), second
step at 50 lb. ft. (68 N·m), and finish with a final
torque of
e. Any components attached to front or rear of
cylinder head.
7.4L
85 lb. ft. (115 N·m)
92 lb. ft. (124 N·m)
f.
Spark plugs.
454/502 Magnum
g. Head bolts.
!
CAUTION
The head gasket may be holding cylinder head to
block. Use care when prying off cylinder heads.
DO NOT damage gasket surfaces. DO NOT drop
cylinder heads.
3.
Place cylinder head on wooden blocks to prevent
damage to gasket surfaces.
72944
Cylinder Head Torque Sequence
Cleaning and Inspection
5. Install push rods and rocker arm assemblies in
their original positions. Coat threads on rocker
arm bolt with Perfect Seal. Torque
1.
Clean gasket material and sealer from engine
block and cylinder heads.
7.4L
454/502
40 lb. ft. (54 N·m)
45 lb. ft. (61 N·m)
Magnum
2.
Inspect sealing surfaces for deep nicks and
scratches.
6.
Install as outlined:
3.
4.
Inspect for corrosion around cooling passages.
a. Intake manifold.
b. Rocker arm covers.
c. Exhaust manifolds.
d. Spark plugs.
Clean head bolt threads and engine block bolt
hole threads, making sure no dirt, old oil or cool-
ant remain.
e. Any components removed from front or rear
of cylinder heads.
Index
90-823224--2
796
454 CID (7.4L) / 502 CID (8.2L) - 3A-29
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 454 CID, Mercury MerCruiser 502 CID |
| Model Year | 1993, 1994, 1995, 1996, 1997 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
(4 votes, average: 4.5 out of 5)
Marine readers have rated 1993 1997 Mercury-MerCruiser GM V8 454 CID 7.4L and 502 CID 8.2L Marine Engines Service Manual Number 16 4.5 out of 5.0 based on 4 product reviews. Hugely helpful service manual! Perfect. Thank you!
Manuals are all Important for Technician
This book is invaluable if you do your own repairs. Great book.
Could not find a copy until a search brought me here.
Excellent print.
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