Cylinder Head And Valvetrain Flashcards Preview

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Flashcards in Cylinder Head And Valvetrain Deck (11):
1

Cylinder head removal should be performed on a completely _________ engine to reduce the chance of ________.
Head bolts should be removed in a sequence exactly _______ of the ______ sequence
Do not sit the head directly on the workbench many Diesel engines have __________ or __________ protruding from them.

Cool
Warping
-
Opposite
Installation
-
Injector tips
Glow plugs

2

When cracks in the head are suspected, ________ or ________ detection equipment may be required to highlight them.
Visually inspect the head for cracks in the _______,scale build up in the __________, and pitting of ______ .
Obstructions lodged in holes such as metal liquids can cause a bolt to bottom and _______ without obtaining the required ___________.

Magnetic
Dye
__
Casting
Coolant passages
Machined surfaces
___
Torque value
Clamping force

3

The cylinder head should be checked for _____ using a _____ and ______, measure for ______.
Check cylinder head thickness called _______ thickness to determine the maximum allowable machining thickness.
Cylinder head thickness should be measured if a tech suspects the head has been __________.

Warping
Straightedge
Feeler gauge
Flatness
_
Deck to deck
_
Machined

4

Check for war page at each end and between each _________ between center lines of ______, and the outer edge of the ________.
If properly reassembled a machined cylinder head allows ________ tips __________, and ________ to move deeper into the cylinder.
This can increase ______,______ of injector spray pattern and contact with _______. In OHC engines ________ operation can be affected

Cylinder
Valves
Fire deck
_
Injectors
Glow plugs
Valves
_
Compression
Misalignment
Piston
Cam

5

Check valve spring straightness using a _____. This will prevent stems from ________ and _______ in guides.

Replace valve springs that don't meet tension specs to prevent damage to the _________ or __________.

Valve springs that use the same valve bridge must be replaced together to prevent __________ operation.

Square
Binding
Twisting
_
Piston
Crankshaft
_
Unbalanced

6

Valve ________ rotate the valve every time it's actuated.

Valve _______ keep the spring on the valve.

If valve _______ fail the valve drop into the cylinder and jams the piston this is called ________ .

_______ between the valve guide and valve _________ prevents oil from entering the cylinder.

Rotators
-
Retainers
Dropping a valve
-
Seals
Stem

7

Defective seals can cause excessive ________ leading to engine________ .

Injector sleeves are inspected __________ for damage.

Check the injector tip protrusion using a ___________ and ________ failure to meet specs will result in improper _____________ .

Oil consumption
Smoke
-
Visually
-
Dial indicator
Sled gauge
-
Spray pattern

8

Valve bridges ( cross heads) are used on engines with _______ or ________ valves per cylinder.

The crosshead is a bracket or bridge like device that allows a single rocker arm to open________ valves at the same time

If the bridge is adjustable the adjustment is made when the valves are _________ ( closed). The purpose is to ensure that both valves are opening _________ to prevent ________ of the bridge on the guide .

Three
Four
-
Two
-
Loose
Equally
Binding

9

___________ bridges are not adjustable.

___________ are components that are positioned to ride on the camshaft and transfer motion to the pushrod or ________.

When cam followers are mounted on a plate bolted to the side of the engine it may be necessary to adjust there placement by gaskets of different ________ .

Guide less
-
Cam followers
Rocker arms
-
Thickness

10

When valves are properly adjusted there should be appropriate clearance between the ________ and the top of the ________.

________ is required to ensure the the valves seat completely in the cylinder head.

Exhaust valves operate at _______ temps and are usually adjusted to a ________ spec.

Rocker arm
Valve stem
-
Valve lash
-
Higher
Wider

11

Valves are adjusted _______. Set all valves In firing order sequence.

Injector adjustments on some engines will involve tightening the injector to a specified _________ and tightening the ________.

Other models the adjusting screw will be tightened until the injector ___________ is bottomed the backed off a specified number of _________.

Closed
-
Torque
Locknut
-
Plunger
Degrees