Auto 140 Final Review Notes Flashcards
What is resistance to flow of oil called?
Viscosity
What is the ring called that is pressed on to many crankshaft?
Crank Shaft position sensor ring.
To clean minor rust from a crankshaft what grit sandpaper should you use?
400 grit or finer.
How many degrees apart are the power strokes on a v8 engine?
90 degrees apart.
How many threads per inch on a micrometer?
40
One complete turn of the thimble on a micrometer is how many thousands of an inch?
.025, twenty five thousands.
On an aluminum head what kind of shim goes under the valve spring? Aluminum or steel?
Aluminum.
How would you check for cracks on an aluminum head?
Dye Penetrant.
How would you check for cracks on a cast Iron head?
Magnuflux.
What is the only acceptable method for welding a cracked aluminum head?
Heli-Arc
Valve guide or seat first?
Guide
New or rebuilt engine what should you do when you first fire it up?
Run it at 1500 - 2000 rpms for at least 20-30 min
What is the hardest wear speed on a camshaft?
Idle
Are there camshafts that drive a distributor gear?
Yes
Where does valve overlap occur?
Top of the intake stroke.
Flat tappet lifters vs roller tappet lifters?
Flat replace, roller don’t need to.
What are the 2 types of superchargers?
Blow through and draw through.
Turbos are driven by?
Exhaust flow.
Main bore alignment?
Blue dye.
the greatest amount of cylinder wear occurs?
At 90 degrees to the wrist pin.
Polish in the opposite direction. T or F?
T
What determines the major thrust surface?
The rotation of the crankshaft.
Valve spring pressure may be 10 percent less than spec?
True 10 or less
Way clean cylinder wall?
Wash Down
Describe zero lash valve adjustment on a push rod engine?
- Make sure piston is at TDC.
- Grab the Pushrod and move it up and down.
- Simultaneously tighten the rocker arm nut just until the pushrod stops moving up and down. That’s zero lash.
- Then tighten the rocker nut a 1/2 - 3/4 of a turn further.
