Automotive Technology: A Systems Approach (MindTap Course List)
6th Edition
ISBN: 9781133612315
Author: Jack Erjavec, Rob Thompson
Publisher: Cengage Learning
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Question
Chapter 12, Problem 8RQ
To determine
The effect of resurfacing cylinder head on valve timing and steps taken when heads need resurfacing of OHC engine.
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How does resurfacing a cylind head in OHC engine affect valve timing and what should be done when a head needs resurfacing?
th
OHC engine affect valve timing and what should
of an
5. M
be done when the head needs resurfacing?
4. What usually causes warpage in an aluminum
2. Ho
3. Define valve margin.
cylinder head?
5. What are the two ways pushrods can be
checked for straightness?
6.
True or False
1. True False? Fiat's MultiAir system relies on
mechanical, hydraulic, and electronic technol-
ogies.
2 True False? Camshaft straightness is checked
using V-blocks and a feeler gauge?
driel
bonir
Multiple Choice
1. Which of the following is not true of knurling?
a. It is one of the fastest techniques for restor-
ing the ID dimensions of a worn valve guide.
b. It reduces the amount of work necessary to
reseat the valve.
C. It is useful for restoring badly worn guides to
their original condition.
d. Nond
The gas/oil mixture used in a two stroke engine has been properly mixed. The carburetor high speed & cruise circuit is adjusted to lean. Tech a says that the lean adjustment may cause the engine to fail due to improper lubrication: tech b says that it may cause the engine to fail because of overheating. Who is correct?
Chapter 12 Solutions
Automotive Technology: A Systems Approach (MindTap Course List)
Ch. 12 - Explain staged and continuously variable value...Ch. 12 - Define valve margin.Ch. 12 - What usually causes warpage in an aluminum cylin...Ch. 12 - What are the two ways pushrods can be checked for...Ch. 12 - Which of the following is not true of knurling? It...Ch. 12 - True False? Fiats MultiAir system relies on...Ch. 12 - To allow the engine to run on the Atkinson cycle,...Ch. 12 - Prob. 8RQCh. 12 - To ensure proper seating of the valve, the valve...Ch. 12 - When checking valve fit, contact between the valve...
Ch. 12 - If the valve face and valve seat do not contact...Ch. 12 - Many engines with WT have a phaser mounted to the...Ch. 12 - Multiple valve engines tend to be more efficient...Ch. 12 - Which of the following is not a type of valve...Ch. 12 - Which of the following statements is not true?...Ch. 12 - While discussing the reasons for resurfacing a...Ch. 12 - While inspecting the timing gears of an engine:...Ch. 12 - Technician A says that positive valve stem seals...Ch. 12 - When fitting a freshly ground valve into a freshly...Ch. 12 - Technician A says off-square springs may cause...Ch. 12 - Technician A says it is not necessary to measure...Ch. 12 - Technician A uses a 30-degree stone for topping a...Ch. 12 - While discussing the Valvetronic system:...Ch. 12 - While checking a hydraulic phaser after the...Ch. 12 - While servicing a pair of aluminum cylinder heads:...
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- Which of the following is not one of the strokes of a four-cycle engine? Compression Exhaust Intake Ignitionarrow_forwardTo allow the engine to run on the Atkinson cycle, Toyotas VVT-i system causes the- intake valve to open early exhaust valve to open late intake valve to close late exhaust valve to close earlyarrow_forwardJust need answers of questionarrow_forward
- What is exhaust stroke?arrow_forwardA engine develops power output for each two engine revolution. * Your answer It is the difference in expansion amounts between the cylinder head and pushrod that effectively increases the space between the valve stem and the rocker's arm. * Your answer On a four-stroke cycle reciprocating engine, which strokes are both valves close? * Intake Power Ignition Compression Exhaust It represents the net power output of the engine at the crankshaft. * Your answer If the fuel/air ratio is proper and ignition timing is correct, the combustion process should be completed just after center at the beginning of the power stroke. * Your answerarrow_forwardA six-cylinder engine has a 1 5 3 6 2 4 firing order. Technician A says that after cylinder number 1 begins its intake stroke, the crankshaft will have to travel 240° before cylinder number 3 begins its intake stoke. Technician B says that when cylinder number 3 and 4 are at TDC, cylinders number 5 and 2 are at BDC. Who is correct and explain why? Technician A Technician B Both A and B Neither A nor Barrow_forward
- Which of the following are not typically found in the block of a modern engine? a. Pistons b. Crankshaft c. Valves d. Oil pumparrow_forwardTrue or False? Valve lash is adjusted in many different ways; however, on many OHC engines, the clearance is set by replacing a shim.arrow_forwardHow does a 2 stroke engine run?arrow_forward
- Need solution through half hr pleasearrow_forwardis it true that an l head engine has the intake and exhaust valves mounted in the cylinder headarrow_forwardWhich does makes the volumetric efficiency of the reciprocating engine decrease? * Low cylinder head temperatures Improper valve timing Full throttle operation Sharp bends in the induction system High carburetor air temperatures When the piston reaches the bottom center it reverses direction and starts moving up on the compression stroke. TRUE OR FALSE? * Your answer What happens with the volumetric efficiency when the engine's heat increases? Your answer As an aircraft climbs, air density decreases, thereby decreasing the amount of air in the fuel/air mixture. This results in a vibrant air/fuel mixture which causes a reduction in engine power. TRUE OR FALSE? * Your answerarrow_forward
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