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Check Engine

Check with a vacuum gauge

Connect the meter to the intake manifold. Warm up the engine and let it run at idle.

If the motor is defective, the meter should show 17-22 inches, and the arrow should be uniformly twitch.

If the meter below the required, the likelihood of the following reasons: proceeds gasket between the intake manifold and carburetor or throttle proceeds vacuum hose, not adjusted ignition angle or the angle of rotation of the camshaft.

If the meter below normal by 8 inches - flowing intake manifold gasket or defective injector.

If the needle falls at regular intervals to 2 inches below the normal level of - flow valves.

If the arrow is highly uneven jerks down - jammed valve or spark plugs.

Vibration arrows on the four-inch exhaust gases - worn valve guides.

Fast vibration with increasing engine speed - flowing intake manifold gasket or head, the valve springs are worn out, burned valves or faulty spark.

Weak twitching arrows around a normal level of 1 inch - the problem with the ignition.

Strong twitching hands - spoiled cylinder head gasket.

If the arrow slowly deviates over long stretches - incorrectly mixed fuel flowing intake manifold gasket or choke.

Increase the engine speed to 2500 and stop the engine, the arrow should fall almost to zero, and then climb to 5 inches above the normal mark and return to the normal mark.

If it does not, then the worn piston rings.

If there is a long delay - clogged exhaust system.

Compression Test

PERFORMANCE ORDER

1. Disconnect ignition system, having disconnected the high tension of the ignition system of the ignition distributor cap, and grounding it on the block. 2. Connect the device for compression measurement to the spark plug hole of the cylinder N1. 3. Fully open the throttle and spin the crankshaft of the engine starter. After one or two turns of the compression pressure should increase to a peak and then stabilize. Record result. 4. Spend similar check with other cylinders and write down the received indications. 5. Pressure in all cylinders should be identical. The difference is more than 2 bar between any two cylinders means malfunction. In the serviceable engine pressure should accrue quickly. A small pressure of the first step gradually raising at the subsequent steps, specifies that piston rings are worn out. A small pressure of the first measure, which does not accrue at the subsequent steps, specifies in leak in valves or on the punched lining of a head. Deposits on the lower parts of the valve can also cause a low compression. 6. If the inspection you have any doubts, contact the experienced professionals. 7. If pressure, in what or the cylinder too low, spend the following check to establish the cause. Pour a teaspoon of engine oil into the cylinder through the spark plug hole and recheck pressure. 8. If, after adding an oil pressure increased compression, this means that the worn piston or cylinder. If the pressure is not increased, means, the reason in the worn out or scorched valves or in the punched lining of a head of cylinders. 9. Low pressure in two next cylinders practically always means that between them the head lining is punched. 10. If one of the pressure cylinders is about 20% lower than in the rest of the engine and poor idling, this means that the cause is possibly worn camshaft lobe. 11. If the pressure is too large, then most likely, the walls of the combustion chambers are covered with deposits of coal. 12. After completing the inspection screw in spark plugs on places and connect ignition system.