600 SRM 496
Engine Removal and Installation
General
This section has the instructions for removal, disas-
sembly, repair, assembly, installation, checks, adjust-
ments, and troubleshooting for the Mazda M4-2.0G
and M4-2.2G engines. The engine specifications are
given at the end of the section.
Additional information on engine components can be
found in the sections for Gasoline Fuel System,
LPG Fuel System, and Electrical System.
Description
WARNING
Some gaskets used in this engine can contain
dangerous fibers. Breathing dust from these
fibers is a cancer or lung disease hazard. Do
not create dust!
Use vacuum equipment for
asbestos or follow the cleaning procedure de-
scribed below.
• Make sure the gasket material is wet with wa-
ter or oil to prevent particles in the air.
• Use a hand scraper to remove old gasket ma-
terial. Do not use a power tool or compressed
air.
• Discard all asbestos material in a closed con-
tainer while it is still wet.
• Put a DANGEROUS FIBERS warning label on
the container. Discard dangerous fiber mate-
rial safely.
CAUTION
Disconnect the battery cables before doing any
disassembly and repair to the engine or parts
of the electrical system.
The diodes and resistors in the electrical sys-
tem can be damaged if the following cautions
are not followed:
• Do not disconnect the battery when the en-
gine is running. The voltage surge can dam-
age the diodes and resistors.
• Do not disconnect an electric wire before the
engine is stopped and the key switch is OFF.
• Do not cause a short circuit by connection
of the electric wires to the wrong terminals.
Make sure a correct identification of the wire
is made wire before it is connected.
• Make sure a battery is the correct voltage and
polarity before it is connected.
• Do not check for current flow by making a
spark because the transistors can be dam-
aged.
The Mazda M4-2.0G and M4-2.2G engines have
four cylinders.
The displacement of the M4-2.0G
is 1998 cm
3
(121.9 in.
3
). The displacement of the
M4-2.2G is 2184 cm
3
(133.2 in.
3
). The firing order is
1 – 3 – 4 – 2. They are both available with either a
gasoline or LPG fuel system. The No. 1 cylinder is
toward the end of the engine with the cooling fan.
The overhead camshaft is driven by a cog belt. The
camshaft operates the rocker arms that actuate the
valves.
The crankshaft has five main bearings. The main
bearing in the center of the crankshaft is also the
thrust bearing.
The pistons are aluminum alloy and have three pis-
ton rings. Each of the two compression rings have a
special shape designed for its position on the piston.
The third piston ring is the oil control ring.
Engine Removal and Installation
The removal and installation procedures for the engine are not included in this section.
For model
units H1.50-1.75 (S/H25-35XM) and H2.00 (S/H40XMS), see the section Frame 100 SRM 545. For model
units S/H2.00-3.20 (S/H40-65XM), see the section Frame 100 SRM 505.
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