Question 1

High-volume engine rebuilders use a run-in stand to ____________________ rebuilt engines following assembly.

Accepted Answer

spin test

Question 2

Short blocks are completely assembled rebuilt blocks purchased from automotive machine shops and engine rebuilding companies.

Accepted Answer

Short blocks include the engine block, crankshaft, connecting rods, pistons, and bearings, but do not include the cylinder heads, timing components, or valve train, making them partially assembled units ready for further build-up.

Question 3

While having a discussion, Technician A says that the Automotive Engine Rebuilders Association recommends prefilling hydraulic lifters. Technician B says that if they are underfilled, the valves can be held off their seats, which will make starting the engine difficult. Who is correct?
A) A only
B) B only
C) Both A and B
D) Neither A nor B

Accepted Answer

D

Question 4

Tightening down an OHC camshaft sprocket with an impact wrench can result in a broken camshaft ____________________.

Accepted Answer

The answer of Tightening down an OHC camshaft sprocket with...

Question 5

During assembly of pushrod V-type engines, it is best to adjust ____________________ preload before the intake manifold is installed because you will be able to see that the lifters are on the heel of the cam lobes and are positioned low in their bores.

Accepted Answer

The answer of During assembly of pushrod V-type engines, it...

Question 6

The kit that will MOST-Likely include gaskets, piston rings, crankshaft bearings, and sometimes, a timing set, is the:
A) crankshaft kit
B) timing chain set
C) master kit
D) overhaul kit

Accepted Answer

An overhaul kit typically includes gaskets, piston rings, crankshaft bearings, and sometimes a timing set, as it is designed for a comprehensive engine rebuild.

Question 7

Long blocks are tested in run-in stands or spin testers so more problems can be spotted before installation.

Accepted Answer

Long blocks are tested in run-in stands or spin testers to ensure they are functioning correctly and to identify any issues before they are installed in a vehicle, improving reliability and reducing the likelihood of future problems.

Question 8

A(n) ____________________ is one where a customer's engine is rebuilt for use in the same vehicle from which it was removed.

Accepted Answer

The answer of A(n) ____________________ is one where a customer's...

Question 9

A(n) ____ includes the chain and sprockets as well as chain guides and a tensioner for overhead cam (OHC) engines.
A) crankshaft kit
B) timing chain set
C) overhaul kit
D) master kit

Accepted Answer

A timing chain set includes the chain and sprockets as well as chain guides and a tensioner, which are essential components for the operation of overhead cam (OHC) engines.

Question 10

The machinist is paid to clean the crankshaft after grinding.

Accepted Answer

The answer of The machinist is paid to clean the...

Question 11

Which of the following statements is LEAST-Likely true?
A) When installing the crank, cleaning the recesses where the bearing lock tab will fit is often the cause of a tight crankshaft.
B) When installing the crank, clean the main bearing bores to prevent oil clearance and heat transfer problems.
C) It takes only a small film of dirt left from the hot tank, bake oven, or shot peening process to increase the oil clearance by 0.001" or more.
D) Often, during an oil clearance check on a newly rebuilt engine, excessive clearance is discovered.

Accepted Answer

Explanation: The statement that cleaning the recesses where the bearing lock tab will fit is often the cause of a tight crankshaft is the least likely to be true. In reality, ensuring cleanliness during the installation of the crank, including the recesses for bearing lock tabs, is crucial for preventing issues. The other statements accurately reflect common practices and concerns in engine rebuilding and maintenance.

Question 12

All of the following statements are true EXCEPT:
A) once an engine is assembled, the only way for dirt to get in is past the air cleaner, so cleanliness during assembly is a must.
B) if a bolt cannot be turned into a hole by finger pressure only, something is wrong.
C) it is okay to force threads together with hand tools or an impact wrench.
D) finger-start all bolts that fasten a particular part before proceeding to torque any of them down.

Accepted Answer

Forcing threads together with hand tools or an impact wrench can damage the threads and compromise the integrity of the connection. Proper practice is to ensure threads align and engage smoothly without excessive force, indicating that parts are correctly matched and aligned.

Question 13

All of the following statements are true EXCEPT:
A) if an engine failed due to an overheating problem, it is possible that the sensors for coolant temperature and the fan relay could be defective.
B) sometimes a piston will seize in the cylinder due to an air leak in the intake manifold or a fuel system problem, resulting in too lean an air-fuel mixture.
C) any fuel and cooling system hoses that are not in excellent condition must be replaced.
D) if a problem is one that is not the responsibility of the rebuilder, under the terms of the warranty the rebuilder is still liable for the cost of the repair.

Accepted Answer

The rebuilder's warranty typically covers defects in workmanship or materials from the rebuilding process itself, not issues that arise from external factors or components not covered by the rebuild.

Question 14

____________________ is a broad term that refers to parts that are sold by the non-OE market.

Accepted Answer

The answer of ____________________ is a broad term that refers...

Question 15

Cylinder bores, core plug holes, and valve guides and stems cannot be oversize.

Accepted Answer

Cylinder bores, core plug holes, and valve guides and stems can indeed be machined to oversize dimensions to accommodate wear or damage. This is a common practice in engine rebuilding and repair to extend the life of the engine components.

Question 16

End play tolerance is usually from ____ for a crankshaft with a 2" to 2-3/4" main bearing diameter.
A) 0.002" to 0.004"
B) 0.004" to 0.006"
C) 0.006" to 0.008"
D) 0.008" to 0.010"

Accepted Answer

The typical end play tolerance for a crankshaft with a 2" to 2-3/4" main bearing diameter is usually between 0.004" to 0.006".

Question 17

Some rebuilt engines have warranties that expire in as little as 90 days or 4,000 miles.

Accepted Answer

Rebuilt engines can come with varying warranties depending on the rebuilder, and it's not uncommon for some to offer short-term warranties such as 90 days or 4,000 miles, especially if the rebuild was minimal or if the engine is expected to undergo light use.

Question 18

The kit that will MOST-Likely include a reground crankshaft and bearings is the:
A) crankshaft kit
B) timing chain set
C) overhaul kit
D) master kit

Accepted Answer

A crankshaft kit typically includes a reground crankshaft and bearings, which are essential components for rebuilding or repairing the bottom end of an engine.

Question 19

While having a discussion, Technician A says that you should always oil the bearing backs. Technician B says that they are not a bearing surface so should not be oiled. Who is correct?
A) A only
B) B only
C) Both A and B
D) Neither A nor B

Accepted Answer

The backs of bearings are not a bearing surface and should not be oiled, as oiling them can cause them to slip or rotate in their housing.

Question 20

The parts that are LEAST-Likely to be found in an engine "master kit" are:
A) pistons
B) rings
C) plenums
D) reground crank and bearings

Accepted Answer

Plenums are not typically included in an engine "master kit". Master kits usually contain internal engine components such as pistons, rings, and bearings, but plenums, which are part of the air intake system, are not commonly included.

Quiz 55: Ordering Parts, Short and Long Blocks, Engine Assembly

High-volume engine rebuilders use a run-in stand to ____________________ rebuilt engines following assembly.

Short blocks are completely assembled rebuilt blocks purchased from automotive machine shops and engine rebuilding companies.

While having a discussion, Technician A says that the Automotive Engine Rebuilders Association recommends prefilling hydraulic lifters. Technician B says that if they are underfilled, the valves can be held off their seats, which will make starting the engine difficult. Who is correct?

Tightening down an OHC camshaft sprocket with an impact wrench can result in a broken camshaft ____________________.

During assembly of pushrod V-type engines, it is best to adjust ____________________ preload before the intake manifold is installed because you will be able to see that the lifters are on the heel of the cam lobes and are positioned low in their bores.

The kit that will MOST-Likely include gaskets, piston rings, crankshaft bearings, and sometimes, a timing set, is the:

Long blocks are tested in run-in stands or spin testers so more problems can be spotted before installation.

A(n) ____________________ is one where a customer's engine is rebuilt for use in the same vehicle from which it was removed.

A(n) ____ includes the chain and sprockets as well as chain guides and a tensioner for overhead cam (OHC) engines.

The machinist is paid to clean the crankshaft after grinding.

Which of the following statements is LEAST-Likely true?

All of the following statements are true EXCEPT:

All of the following statements are true EXCEPT:

____________________ is a broad term that refers to parts that are sold by the non-OE market.

Cylinder bores, core plug holes, and valve guides and stems cannot be oversize.

End play tolerance is usually from ____ for a crankshaft with a 2" to 2-3/4" main bearing diameter.

Some rebuilt engines have warranties that expire in as little as 90 days or 4,000 miles.

The kit that will MOST-Likely include a reground crankshaft and bearings is the:

While having a discussion, Technician A says that you should always oil the bearing backs. Technician B says that they are not a bearing surface so should not be oiled. Who is correct?

The parts that are LEAST-Likely to be found in an engine "master kit" are: