Cylinder Head Cover Disassembly (3.0L); Lower Intake Manifold Disassembly (3.0L); Exhaust Manifolds (3.0L) - Mazda B-Series 1997 Workshop Manual

DISASSEMBLY
Disassembly Note
Cylinder head cover
1.
Disconnect the high-tension leads from the spark plugs.
2. Remove the high-tension lead separator assembly from
the cylinder head cover studs and move it out of the way.
3. Remove the PCV valve.
4.
Remove the fuel injector harness stand-offs from the
inboard cylinder head cover studs arld move the harness
out of the way.
5. Disconnect the engine harness connectors on the right
cylinder head cover.
6. Remove the PCV closure hose frorr~ the oil fill adapter.
7. Loosen all of the cylinder head cover bolts.
8. Carefully slide a sharp, thin-bladed knife between the
cylinder head gasket surface and the cylinder head cover
gasket at the two RTV junctions. Cut only the RTV sealer
and avoid cutting the integral gasket. Lift the cover from
the cylinder head while making sure that the RTV sealer
is not pulling the gasket from the cover.
Note
The cylinder head cover incorporates an integral
gasket which should last the life of the vehicle.
4BUOB2-075
Lower intake manifold
1.
Mark the location of vacuum lines and remove them.
2. Disconnect the following harness connectors:
(1) Intake air temperature sensor
(2) Idle air control solenoid
(3) Engine coolant temperature sensor
(4) Ignition coil
(5) Water temperature indicator sender
3. Disconnect each injector's electrical connector and re-
move the harness from the engine.
4. Loosen the No. 3 cylinder intake valve rocker arm retain-
ing bolt and rotate the arm off the push rod and away from
the valve stem.
5. Remove the push rod from the No. 3 cylinder intake valve.
6. Remove the bolts.
Note
Before attempting to remove the lower intake mani-
fold, break the seal between the manifold and the
cylinder block. Wedge a large screwdriver or simi-
lar heavy-duty tool between the manifold and the
cylinder block.
I 1
7. Remove the lower intake manifold.
MB1140-A 613UOB2-009
Exhaust manifolds
Note
Spray the nuts with rust penetrant prior to loosen-
ing to prevent the removal of thie stud with the nut.