181
CID (3.0L) 4 CYLINDER GM ENGINE
SERVICE MANUAL NUMBER 26
Camshaft
Measuring Lobe Lift
NOTE: Procedure is similar to checking valve timing. If improper valve operation is indi-
cated, measure lift of each push rod in consecutive order and record readings.
1.
2.
Remove valve mechanism as previously outlined.
Position indicator with ball socket adaptor tool on push rod. Be sure that push rod is in
lifter socket.
a
72907
a - Ball Socket Adaptor Tool (J-8520-1)
3.
4.
Rotate crankshaft torsional damper slowly in direction of rotation until lifter is on heel of
cam lobe. At this point, push rod will be in its lowest position.
Set dial indicator on zero, then rotate balancer slowly (or attach an auxiliary starter
switch and “bump” engine over) until push rod is in fully raised position.
5.
6.
Compare total lift, recorded from dial indicator, with “Specifications.”
Continue to rotate engine until indicator reads zero. This will be a check on accuracy of
original indicator reading.
7.
8.
If camshaft readings for all lobes are within specifications, remove dial indicator assem-
bly.
Install rocker arm and push rod. Torque nuts to 20 lb-ft (27 Nm).
Removal
1.
2.
3.
4.
Remove valve lifters as previously outlined.
Remove crankcase front cover as previously outlined.
Remove fuel pump.
Align timing gear marks, then remove the two camshaft thrust plate screws by working
through holes in camshaft gear.
Index
Page 3A-58
90-861329--1 MARCH 1999
| 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)
Marine readers have rated Mercury MerCruiser GM 4 Cylinder 181 cid 3.0L Marine Engines Service Manual Number 26 5.0 out of 5.0 based on 6 product reviews. Thanks for sharing this material. Helps a lot after suffering with bad mechanics. spend too much money and nothing very good
great manual, makes impossible jobs possible. without a manual you can not do the job, a must have.
Great resource. Excellent information provided.
Need help to install automate choke
Need help to instal automate choke