Auto 140 Final Review Notes

Question 1

What is resistance to flow of oil called?

Answer 1

Viscosity

Question 2

What is the ring called that is pressed on to many crankshaft?

Answer 2

Crank Shaft position sensor ring.

Question 3

To clean minor rust from a crankshaft what grit sandpaper should you use?

Answer 3

400 grit or finer.

Question 4

How many degrees apart are the power strokes on a v8 engine?

Answer 4

90 degrees apart.

Question 5

How many threads per inch on a micrometer?

Answer 5

40

Question 6

One complete turn of the thimble on a micrometer is how many thousands of an inch?

Answer 6

.025, twenty five thousands.

Question 7

On an aluminum head what kind of shim goes under the valve spring? Aluminum or steel?

Answer 7

Aluminum.

Question 8

How would you check for cracks on an aluminum head?

Answer 8

Dye Penetrant.

Question 9

How would you check for cracks on a cast Iron head?

Answer 9

Magnuflux.

Question 10

What is the only acceptable method for welding a cracked aluminum head?

Answer 10

Heli-Arc

Question 11

Valve guide or seat first?

Answer 11

Guide

Question 12

New or rebuilt engine what should you do when you first fire it up?

Answer 12

Run it at 1500 - 2000 rpms for at least 20-30 min

Question 13

What is the hardest wear speed on a camshaft?

Answer 13

Idle

Question 14

Are there camshafts that drive a distributor gear?

Answer 14

Yes

Question 15

Where does valve overlap occur?

Answer 15

Top of the intake stroke.

Question 16

Flat tappet lifters vs roller tappet lifters?

Answer 16

Flat replace, roller don’t need to.

Question 17

What are the 2 types of superchargers?

Answer 17

Blow through and draw through.

Question 18

Turbos are driven by?

Answer 18

Exhaust flow.

Question 19

Main bore alignment?

Answer 19

Blue dye.

Question 20

the greatest amount of cylinder wear occurs?

Answer 20

At 90 degrees to the wrist pin.

Question 21

Polish in the opposite direction. T or F?

Answer 21

T

Question 22

What determines the major thrust surface?

Answer 22

The rotation of the crankshaft.

Question 23

Valve spring pressure may be 10 percent less than spec?

Answer 23

True 10 or less

Question 24

Way clean cylinder wall?

Answer 24

Wash Down

Question 25

Describe zero lash valve adjustment on a push rod engine?

Answer 25

1. Make sure piston is at TDC.
2. Grab the Pushrod and move it up and down.
3. Simultaneously tighten the rocker arm nut just until the pushrod stops moving up and down. That’s zero lash.
4. Then tighten the rocker nut a 1/2 - 3/4 of a turn further.