SERVICE MANUAL NUMBER 26
181 CID (3.0L) 4 CYLINDER GM ENGINE
Inspection
Clean camshaft bearing bores in cylinder block with solvent and blow out with compressed
air. Be sure grooves and drilled oil passages are clean.
Installation
CAUTION
Oil holes in bearings must line up with oil holes in cylinder block. Oil hole is on top
side of bearing shell and cannot be seen during installation, so first align bearing
shell oil hole with oil hole in bore and mark opposite side of bearing and block at
bore to easily position oil hole during installation.
IMPORTANT: Front bearing must be driven approximately .125 in. (3 mm) behind the
block face to uncover oil hole to timing gear oil nozzle.
IMPORTANT: All camshaft bearings are not the same. Be sure to install bearings in
proper locations (Indicated by bearing manufacturer) and to position bearings as
follows (directional references are in reference to engine in its normal operating
position):
Lubricate outer surface of new camshaft bearings with engine oil to ease installation.
1.
Installing intermediate and center bearings:
a. Install nut and thrust washer all the way onto puller screw, then position pilot in front
camshaft bearing bore and insert screw through pilot.
b. Index center camshaft bearing, then position appropriate size remover and installer
tool in bearing and thread puller screw into tool. Be sure at least 1/2 in. (13 mm) of
threads are engaged.
74478
Pulling Cam Bearing From Bore
c. Using two wrenches, hold puller screw and turn nut until bearing has been pulled into
position. Remove the remover and installer tool and ensure that oil hole(s) in bearing
is positioned correctly.
d. Install intermediate bearings in same manner. Be sure to index bearings correctly.
It will be necessary to position pilot in rear camshaft bearing bore to install rear inter-
mediate bearing.
2.
Installing front and rear bearings:
a. Install appropriate size remover and installer tool on drive handle.
Index
90-861329--1
MARCH 1999
Page 3A-63
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 181 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 |
(6 votes, average: 5 out of 5)
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