Car Tuning Cooling System Upgrades 2

Question 1

What is the primary purpose of an external oil cooler on a performance engine?

Accepted Answer

To maintain oil viscosity by preventing excessive oil temperature

Answer

To filter metallic particles from the oil circuit

Answer

To increase oil pressure under sustained high loads

Answer

To allow the use of a thinner base oil grade

Question 2

Which coolant formulation is generally recommended for modern aluminum engines to prevent corrosion?

Accepted Answer

OAT or HOAT extended-life coolant

Answer

Green silicate-based IAT coolant

Answer

Ethylene glycol with copper inhibitor additives

Answer

Pure distilled water only

Question 3

Which symptom most commonly indicates a failing water pump in a performance vehicle?

Accepted Answer

Engine overheating combined with coolant weeping from the pump's weep hole

Answer

Increased fuel consumption and lean fuel trims

Answer

Rough idle and cylinder misfires under load

Answer

Loss of power steering assist

Question 4

What does 'row count' describe in radiator terminology?

Accepted Answer

The number of coolant tube layers stacked through the core depth front-to-back

Answer

The number of cooling fins per inch of core

Answer

The total number of inlet and outlet ports on the radiator

Answer

The quantity of coolant channels inside each end tank

Question 5

What is the function of a fan shroud in an engine cooling system?

Accepted Answer

To direct all fan airflow through the radiator core and prevent it from bypassing around the edges

Answer

To shield the radiator core from road debris

Answer

To reduce cooling fan noise at highway speeds

Answer

To improve the vehicle's aerodynamic drag coefficient

Question 6

If a thermostat fails stuck in the open position, what is the most likely result?

Accepted Answer

The engine runs below optimal temperature, hurting fuel economy and emissions

Answer

The engine overheats rapidly due to coolant starvation

Answer

Coolant pressure builds to dangerous levels

Answer

The water pump begins to cavitate

Question 7

What does upgrading a radiator pressure cap from 13 psi to 18 psi accomplish in a performance cooling system?

Accepted Answer

It raises the boiling point of the coolant to prevent premature boiling

Answer

It reduces the risk of water pump cavitation at high RPM

Answer

It increases the total volume of coolant the system can hold

Answer

It lowers the thermostat's opening temperature