SERVICE MANUAL NUMBER 23
454 CID (7.4L) / 502 CID (8.2L)
Crankshaft Sprocket
Removal
1.
2.
3.
Remove torsional damper and crankcase front cover as outlined.
Remove camshaft timing chain as outlined.
Remove crankshaft sprocket using crankshaft gear and sprocket puller (J-24420-B).
Installation
1.
Using crankshaft gear and sprocket installer, as shown, install sprocket on crankshaft.
a
72550
a - Crankshaft Gear And Sprocket Installer (J-1058-20)
2.
3.
Install timing chain as outlined.
Install crankcase cover and torsional damper as outlined.
Checking Timing Chain Deflection
With timing chain and sprockets installed, check timing chain deflection, as follows:
1.
2.
Rotate camshaft (in either direction) to place tension on one side of the chain.
Establish a reference point on the block (on taut side of chain) and measure from this
point to the chain.
3.
4.
Rotate camshaft in the opposite direction to slacken the chain, then force chain out with
fingers and again measure the distance between reference point and timing chain.
The deflection is the difference between these two measurements. If the deflection
exceeds 3/4 in. (19 mm), timing chain should be replaced.
a
72946
a - Reference Point
5.
Install torsional damper and crankcase front cover.
Index
90-861326--1 MARCH 1999
Page 3A-77
| 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...