MANIFOLDS, ELBOWS AND RISERS
SERVICE MANUAL NUMBER 30
Removal
WARNING
Avoid possible injury or damage to equipment should wires be accidentally
shorted. Disconnect BOTH battery cables from battery before proceeding.
1.
Disconnect battery cables from battery.
CAUTION
To avoid severe engine damage. Exhaust elbows and manifolds MUST BE drained
to prevent water from entering combustion chambers when exhaust elbows are
removed.
2.
Drain water from manifold, elbow and riser, if equipped.
Disconnect exhaust and cooling hoses.
3.
4.
Remove any other components that are mounted to the manifold, elbow and riser, if
equipped.
5.
6.
7.
Remove elbow and riser, if equipped.
Remove exhaust manifold fasteners.
Remove manifold assembly and discard gaskets.
Cleaning and Inspection
1.
2.
3.
Clean gasket material from all surfaces and wash parts in solvent.
Check water passages for foreign material. Passages must be clean for efficient cooling.
If more thorough inspection is desired, pipe plugs may be removed from exhaust man-
ifold.
IMPORTANT: If plugs are removed, coat threads with Quicksilver Perfect Seal before
reinstalling.
4.
5.
Check for cracks.
To test manifold and water rail for leaks, block-off plates, plugs or short hoses with
plugged ends must be used. One block-off plate must have a threaded hole for attaching
compressed air hose. Use new gaskets when installing block-off plates. Apply 20 psi
(138
leak.
kPa) of air pressure and submerge manifold in water. Air bubbles will indicate a
INDEX
Page 7A-4
90-863161 SEPTEMBER 2000
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 496 CID |
| Model Year | 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
(2 votes, average: 4 out of 4)
Marine readers have rated Mercury MerCruiser 496 CID 8.1L Gasoline Marine Engines Service Manual Number 30 4.0 out of 4.0 based on 2 product reviews. How many openings for crankcaseventilation is there on
Merc 496 HO ?
Great down load . it was all there an more