454
CID (7.4L) / 502 CID (8.2L)
SERVICE MANUAL NUMBER 23
Timing Chain and Sprocket
Removal
1.
2.
Remove torsional damper, oil pan and front cover as outlined.
Turn crankshaft until timing marks on crankshaft and camshaft sprockets are in align-
ment as shown.
b
a
72946
a - Timing Marks Aligned
b - Locating Pin
3.
4.
Remove camshaft sprocket and timing chain. If sprocket does not come off easily, a light
tap on the lower edge of the sprocket, using a plastic mallet, should dislodge it.
If crankshaft sprocket requires replacement, remove as outlined.
Cleaning and Inspection
1.
2.
3.
Clean all parts in solvent and dry with compressed air.
Inspect timing chain for wear and damage.
Inspect sprockets for wear and damage.
Installation
1.
2.
If crankshaft sprocket was removed, install as outlined in “Crankshaft Sprocket.”
Install timing chain on camshaft sprocket. Hold sprocket vertical with chain hanging
down. Align marks on camshaft and crankshaft sprockets.
IMPORTANT: Do not attempt to drive sprocket on camshaft, as welsh plug at rear of
engine can be dislodged.
3.
4.
Install sprocket on camshaft. Torque bolts to 22 lb-ft (30 Nm).
Lubricatetimingchainwithengineoil.Installcrankcasefrontcoverandtorsionaldamper
as outlined.
Index
Page 3A-76
90-861326--1 MARCH 1999
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 454 CID, Mercury MerCruiser 502 CID |
| Model Year | 1998, 1999, 2000, 2001 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
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Marine readers have rated Mercury MerCruiser GM V8 GM V8 454 CID 7.4L and 502 cid 8.2L Marine Engines Service Manual Number 23 5.0 out of 5.0 based on 1 product reviews. Just need the manual. Wrote review. Can't technically review what I haven't seen yet...