Question 1

Technician A says that a pressed-fit cylinder sleeve usually has an I.D. that is smaller than the original bore size. Technician B says to clean the block thoroughly with solvent after honing. Who is right

Accepted Answer

Technician A is correct because a pressed-fit cylinder sleeve is designed to be pressed into the block with a slightly smaller I.D. than the original bore size. Technician B is incorrect because cleaning the block with solvent after honing can cause residual solvent to contaminate the engine, leading to potential issues. Instead, the block should be thoroughly cleaned with hot soapy water and rinsed in hot water before assembly.

Question 2

Technician A says that oil gallery plugs and heater-hose connections usually have NPT threads. Technician B says that a 3/8" to 1/4" socket adapter is used to remove oil gallery plugs. Who is right?

Accepted Answer

Technician A is correct that oil gallery plugs and heater-hose connections usually have NPT (National Pipe Thread) threads. Technician B is incorrect that a 3/8" to 1/4" socket adapter is used to remove oil gallery plugs - the appropriate tool would depend on the specific make and model of the vehicle.

Question 3

Technician A says that removing 0.015" of material from the cylinder wall will result in a bore that is 0.030" larger. Technician B says that a 0.030" oversized cylinder has a wall thickness that is 0.015" thinner than stock. Who is right?

Accepted Answer

Technician A is correct because removing 0.015" of material from each side of the cylinder wall results in a bore that is 0.030" larger in diameter. This is because the diameter is measured across the center of the cylinder, so removing material from both sides increases the diameter by twice the amount removed. 
Technician B is also correct because when a cylinder is bored oversize, the wall thickness is reduced by half the amount oversize. Therefore, a cylinder bored 0.030" oversize will have a wall thickness that is 0.015" thinner than a stock cylinder.

Question 4

Technician A says that if the camshaft is too tight after new cam bearings are installed, the bearing can be sanded with emery cloth. Technician B says that the front cam bearing is always installed flush with the front of the block. Who is right?

Accepted Answer

The answer of Technician A says that if the camshaft...

Quiz 10: Cylinder Block: Inspection and Service

Technician A says that a pressed-fit cylinder sleeve usually has an I.D. that is smaller than the original bore size. Technician B says to clean the block thoroughly with solvent after honing. Who is right

Technician A says that oil gallery plugs and heater-hose connections usually have NPT threads. Technician B says that a 3/8" to 1/4" socket adapter is used to remove oil gallery plugs. Who is right?

Technician A says that removing 0.015" of material from the cylinder wall will result in a bore that is 0.030" larger. Technician B says that a 0.030" oversized cylinder has a wall thickness that is 0.015" thinner than stock. Who is right?

Technician A says that if the camshaft is too tight after new cam bearings are installed, the bearing can be sanded with emery cloth. Technician B says that the front cam bearing is always installed flush with the front of the block. Who is right?