Exam 13: Engine Sealing and Reassembly

The thermostat is installed with the temperature sensor [wax pellet] facing toward the ____________________.

What is the major difference between aerobic and anaerobic sealants?

The proper engine break-in procedure is a test run at ______.

After the head has been resurfaced on an OHC engine, a stackable multilayer aftermarket head gasket can be used to restore proper cam timing.

Gasket sealants should be used on all gasket installations.

When is a torque angle gauge used?

All head bolts in an engine are the same length.

The prelubricator hose is connected to the _____.

Technician A measures valve lash on an OHC engine by rotating the engine to TDC for number 1 cylinder then measures the gap between the cam and tappet for all the valves. Technician B sets the engine at TDC for number 1 cylinder then measures the gap between the cam and tappet only on the valves that are closed. He then rotates the crankshaft 360 degrees and measures the gap between cam and tappet for the remaining valves. Who is correct?

Gasket material must be able to seal valve covers that are made from steel, aluminum, and ____________________.

Molded rubber gaskets should be coated with hardening-type sealer prior to installation.

Why is it important to check TSBs before replacing a failed gasket?

Describe the torque-angle method of tightening bolts.

Never use a ____________________drying sealant (such as shellac) on gaskets.

Technician A says aluminum expands at a different rate than cast iron. Technician B says cast iron has a coefficient of thermal expansion two or three times greater than aluminum. Who is correct?

Proper engine break-in procedure is being discussed. Technician A says the engine should run at idle speed for at least two hours. Technician B says the engine should be accelerated at full throttle from 30 mph to 50 mph (80 to 133 km/h). Who is correct?

What part of the head gasket is in contact with the combustion gases?

If a bolt is stretched into ____________________, it takes a permanent set and never returns to normal.

A gasket installed upside down or reversed may cause loss of oil pressure, overheating, and engine failure.

A(n) ____________________ is required for a bolt that enters a water jacket.