181
CID (3.0L) 4 CYLINDER GM ENGINE
SERVICE MANUAL NUMBER 26
8.
Check cylinder head gasket surfaces for warp with a machinist’s straight-edge and a
feeler gauge, as shown. Take measurements diagonally across surfaces (both ways)
and straight down center. If surfaces are warped more than .003 in. (0.07 mm) in a 6 in.
area or .007 in. (0.2 mm) overall, block must be resurfaced by an automotive machine
shop.
a
b
72910
a - Machinist’s Straight-Edge
b - Feeler Gauge
CYLINDER CONDITIONING
1.
2.
Performance of the following operation depends upon engine condition at time of repair.
If cylinder block inspection indicates that block is suitable for continued use (except for
out-of-round or tapered cylinders), they can be conditioned by honing or boring.
3.
4.
If cylinders have less than .005 in. (0.127 mm) taper or wear, they can be conditioned
with a hone and fitted with high limit standard size piston. A cylinder bore of more than
.005
in. wear or taper may not clean up entirely when fitted to a high limit piston. To
entirely clean up the bore, it will be necessary to bore for an oversize piston. If more than
in. taper or wear, bore and hone to smallest oversize that will permit complete
.005
resurfacing of all cylinders.
When pistons are being fitted and honing is not necessary, cylinder bores may be
cleaned with a hot water and detergent wash. After cleaning, swab cylinder bores
several times with light engine oil and a clean cloth, then wipe with a clean dry cloth.
CYLINDER BORING
1.
Before using any type boring bar, file off top of cylinder block to remove dirt or burrs. This
is very important to prevent boring bar tilt, resulting in the bored cylinder wall not being
at right angles to crankshaft.
2.
Measure piston to be fitted with a micrometer, measuring at center of piston skirt and
at right angles to piston pin. Bore cylinder to same diameter as piston and hone to give
specified clearance.
NOTE: Hone cylinders as outlined under “Cylinder Honing” and “Piston Selection,”
following.
3.
Carefully observe instructions furnished by manufacturer of equipment being used.
Index
Page 3A-66
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