Question 1

Technician A says backfiring will occur if the distributor is installed 180° off. Technician B says a rebuilt engine should not be run at idle speed for the first few minutes after it is started. Who is right?
A)Technician A
B)Technician B
C)Both technicians
D)Neither technician

Accepted Answer

Both statements are correct. If the distributor is installed 180° off, the engine's timing will be incorrect, leading to backfiring. A rebuilt engine should not be run at idle speed immediately after starting; it should be run at a higher RPM to ensure proper oil distribution and to allow the engine to break in properly.

Question 2

The first oil change on a rebuilt engine should be performed at _____ miles.

Accepted Answer

500

Question 3

Technician A says when reassembling an engine, mushroom-style lifters must be installed after the camshaft. Technician B says it is impossible to straighten a warped camshaft. Who is correct?
A)Technician A
B)Technician B
C)Both technicians
D)Neither technician

Accepted Answer

D

Question 4

Technician A says to avoid lubrication on the thrust bearing surfaces. Technician B says when installing main bearing caps, tap them with a ball peen hammer to insure they seat properly. Who is right?
A)Technician A
B)Technician B
C)Both technicians
D)Nether technician

Accepted Answer

Thrust bearing surfaces require lubrication to function properly and prevent wear. Tapping main bearing caps with a hammer can cause damage; they should be installed carefully and torqued to specifications.

Question 5

A technician has installed a new camshaft and is now installing the distributor. Technician A says to be sure that the number one cylinder is on its intake stroke. Technician B says that the engine can be cranked or turned by hand until the distributor and oil pump are aligned. Who is right?
A)Technician A
B)Technician B
C)Both technicians
D)Neither technician

Accepted Answer

Technician B is correct because the distributor should be installed when the number one cylinder is on its compression stroke, not the intake stroke as Technician A suggests. Aligning the distributor and oil pump can indeed be done by cranking or turning the engine by hand.

Question 6

Technician A says to soak the piston rings thoroughly in oil before installing them to prevent wear during initial break-in. Technician B says a bad fuel pump can trigger a knock sensor. Who is right?
A)Technician A
B)Technician B
C)Both technicians
D)Neither technician

Accepted Answer

Soaking piston rings in oil before installation is a common practice to ensure proper lubrication during the initial break-in period, preventing wear. A bad fuel pump can lead to improper fuel delivery, causing engine knock or pre-detonation, which would trigger a knock sensor.

Question 7

Technician A says when bearing clearance is excessive, polish the entire parting area. Technician B says for a 5-main bearing block, the typical torque sequence is 1,5,3,2,4. Which technician is correct?
A)Technician A
B)Technician B
C)Both technicians
D)Neither technician

Accepted Answer

The answer of Technician A says when bearing clearance is...

Question 8

What tool will we use to check for crankshaft bearing oil clearance?

Accepted Answer

The answer of What tool will we use to check...

Question 9

Technician A says a short piece of fuel hose should be placed over the rod bolts to protect the crankshaft during removal and installation. Technician B says you should wear clean latex gloves before handling engine bearings. Who is correct?
A)Technician A
B)Technician B
C)Both technicians
D)Neither technician

Accepted Answer

Both statements are correct. Placing a short piece of fuel hose over the rod bolts protects the crankshaft from damage during removal and installation, and wearing clean latex gloves before handling engine bearings helps prevent contamination.

Question 10

Technician A says that if a distributor has a gear on the bottom of its shaft, the oil pump cannot be primed in the normal way. Technician B says the lubrication system can be primed with a pressure primer. Who is correct?
A)Technician A
B)Technician B
C)Both technicians
D)Neither technician

Accepted Answer

Technician B is correct because a pressure primer can be used to prime the lubrication system regardless of the distributor's configuration. Technician A is incorrect because the presence of a gear on the distributor shaft does not prevent the oil pump from being primed in the normal way.

Question 11

Two tools we use to check crankshaft end play are a(n) _____ and a(n) _____.

Accepted Answer

The answer of Two tools we use to check crankshaft...

Question 12

Briefly explain what happens when vapor lock occurs.

Accepted Answer

The answer of Briefly explain what happens when vapor lock...

Question 13

On an engine with a standard transmission, insure the flexplate is installed correctly.

Accepted Answer

In an engine with a standard (manual) transmission, a flywheel is used instead of a flexplate. The flexplate is used in automatic transmissions.

Question 14

Technician A says valve lash can be set on some engines when it is running. Technician B says to break in the rings, on the highway accelerate to 50 mph and coast back to 35 mph at least 10 times. Who is right?
A)Technician A
B)Technician B
C)Both technicians
D)Neither technician

Accepted Answer

Technician A is correct because valve lash can indeed be set on some engines while they are running, particularly on older engines with mechanical valve lifters. This process allows for adjustments to be made when the engine is at its operating temperature, ensuring the valve clearance is set accurately for the engine's normal operating conditions. Technician B's statement about breaking in the rings is not a universally recommended practice for engine break-in and can vary depending on the engine and manufacturer's guidelines.

Question 15

A feeler gauge is used to measure mechanical valve lash.

Accepted Answer

A feeler gauge is a tool used to measure gap widths or clearances between two parts, commonly used for adjusting and measuring the mechanical valve lash (clearance) in engines.

Question 16

Without protective gloves, it is possible for acid from your hands to etch engine bearings.

Accepted Answer

The natural oils and acids from human skin can cause corrosion or etching on sensitive metal surfaces like engine bearings if handled without protective gloves.

Question 17

Technician A says when the timing is advanced, the idle will be high. Technician B says to check connecting rod side clearance with an inside micrometer. Who is correct?
A)Technician A
B)Technician B
C)Both technicians
D)Neither technician

Accepted Answer

Advancing the timing can indeed cause the idle to be higher because it changes the point at which the spark plug ignites the fuel-air mixture, potentially leading to faster or more efficient combustion at idle. Checking connecting rod side clearance with an inside micrometer is not the correct method; a feeler gauge is typically used for this purpose.

Question 18

Immediately following an engine overhaul, why should the customer check the oil frequently?

Accepted Answer

The answer of Immediately following an engine overhaul, why should...

Question 19

If an engine is difficult to start, spray starting fluid into it while cranking it over.

Accepted Answer

The answer of If an engine is difficult to start,...

Question 20

Some main bearings have dowels that must fit into a hole in the block.

Accepted Answer

Main bearings can have dowels that fit into holes in the engine block to ensure correct alignment and prevent movement during operation.

Quiz 16: Reassembly and Starting

Technician A says backfiring will occur if the distributor is installed 180° off. Technician B says a rebuilt engine should not be run at idle speed for the first few minutes after it is started. Who is right?

The first oil change on a rebuilt engine should be performed at _____ miles.

Technician A says when reassembling an engine, mushroom-style lifters must be installed after the camshaft. Technician B says it is impossible to straighten a warped camshaft. Who is correct?

Technician A says to avoid lubrication on the thrust bearing surfaces. Technician B says when installing main bearing caps, tap them with a ball peen hammer to insure they seat properly. Who is right?

A technician has installed a new camshaft and is now installing the distributor. Technician A says to be sure that the number one cylinder is on its intake stroke. Technician B says that the engine can be cranked or turned by hand until the distributor and oil pump are aligned. Who is right?

Technician A says to soak the piston rings thoroughly in oil before installing them to prevent wear during initial break-in. Technician B says a bad fuel pump can trigger a knock sensor. Who is right?

Technician A says when bearing clearance is excessive, polish the entire parting area. Technician B says for a 5-main bearing block, the typical torque sequence is 1,5,3,2,4. Which technician is correct?

What tool will we use to check for crankshaft bearing oil clearance?

Technician A says a short piece of fuel hose should be placed over the rod bolts to protect the crankshaft during removal and installation. Technician B says you should wear clean latex gloves before handling engine bearings. Who is correct?

Technician A says that if a distributor has a gear on the bottom of its shaft, the oil pump cannot be primed in the normal way. Technician B says the lubrication system can be primed with a pressure primer. Who is correct?

Two tools we use to check crankshaft end play are a(n) _ and a(n) _.