EXHAUST MANIFOLDS
Removal
The exhaust manifolds can only be removed after taking off the cylinder heads see Cylinder heads—removal.
No Joint is used between the exhaust manifold faces and cylinder heads.
1. Disconnect the automatic choke heat chamber air inlet hose at the inlet tube near the right valve rocker arm cover. Do not remove the air inlet hose at the air cleaner.
2. Remove the air cleaner.
3. Disconnect the exhaust manifold at the muffler inlet pipe.
4. Remove the automatic choke heat tube from the right exhaust manifold.
5. Remove cylinder head(s).
6. Remove the retaining bolts and tab washers and remove the exhaust manifold from the cylinder head.
Cleaning
Remove all gasket material from the manifolds. Make sure the automatic choke air inlet and outlet holes (right exhaust manifold) are completely open and the cover does not leak.
Blow out the automatic choke air heat tube with com-pressed air.
Inspection
Inspect the manifold(s) for cracks, damaged gasket surfaces, or other defects that would make them unfit for further service.
Installation
1. Clean the mating surfaces of the exhaust manifold and cylinder head. Scrape the gasket material from the mounting flange of the exhaust manifold and muffler inlet pipe.
2. Apply graphite grease to the mating surface of the exhaust manifold.
3. Position the exhaust manifold on the cylinder head and Install the retaining bolts and tab washers. Working from the centre to the ends, torque the bolts to specifications. Lock the bolts by bending one tab of the washer over a flat on the bolt.
4. Refit cylinder head(s).
5. Place new gaskets on the muffler inlet pipe. Position the muffler inlet pipe to the manifold, Install and torque the retaining nuts so specifications.
6. Install the automatic choke heat tube on the right exhaust manifold. Install the air cleaner.
7. Connect the automatic choke heat chamber air inlet hose.
8. Start the engine and check for exhaust leaks.
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POSITIVE CRANKCASE VENTILATION SYSTEM
The positive crankcase ventilation system components are shown In Fig. 25.
Refer to the car handbook for the correct mileage interval for maintenance.
Removal
1. Disconnect the automatic choke heat chamber air Inlet hose at the Inlet tube near the right valve rocker arm cover. Do not remove the air Inlet hose at the air cleaner. Remove the air cleaner and Intake duct assembly.
2. Using hose clamp pliers, slide both crankcase vent hose clamps towards the centre of the vent hose. Disconnect the crankcase vent hose at the car-burettor spacer and regulator valve.
3. Pull the regulator valve and fitting (elbow) out of the valve rocker arm cover mounting grommet.
Cleaning
The breather cap located on the rocker arm cover should be cleaned with a solvent at the proper mileage interval. Do not oil the mesh screen after cleaning. At the recommended interval, remove the crankcase
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