Cylinder Head and Valves
02
020
22
RG,RG34710,72
–19–30SEP97–1/1
Preliminary Cylinder Head and Valve Checks
Make preliminary inspection of cylinder head and valve
assembly during disassembly.
Look for the following conditions:
Sticking Valves:
•
Carbon deposits on valve stem.
•
Worn valve guides.
•
Scored valve stems.
•
Warped valve stems.
•
Misaligned or broken valve springs.
•
Worn or distorted valve seats.
•
Insufficient lubrication.
Warped, Worn, or Distorted Valve Guides:
•
Lack of lubrication.
•
Cylinder head distortion.
•
Excessive heat.
•
Unevenly tightened cylinder head cap screws.
Distorted Cylinder Head and Gasket Leakage:
•
Loss of cylinder head cap screw torque.
•
Broken cylinder head cap screw.
•
Overheating from low coolant level operation.
•
Insufficient liner standout.
•
Coolant leakage into cylinder causing hydraulic
failure of gasket.
•
Leaking aftercooler.
•
Cracked cylinder head.
•
Cracked cylinder liner.
•
Damaged or incorrect gasket.
•
Overpowering or overfueling.
•
Damaged cylinder head or block surfaces.
•
Improper surface finish on cylinder head.
•
Improperly tightened cylinder head cap screws or
faulty gasket installation (misaligned).
Worn or Broken Valve Seats:
•
Misaligned valves.
•
Distorted cylinder head.
•
Carbon deposits on seats due to incomplete
combustion.
•
Valve spring tension too weak.
•
Excessive heat.
•
Improper valve clearance.
•
Improper valve timing.
•
Incorrect valve or seat installed.
Burned, Pitted, Worn, or Broken Valves:
•
Worn or distorted valve seats.
•
Loose valve seats.
•
Worn valve guides.
•
Insufficient cooling.
•
Cocked or broken valve springs.
•
Improper engine operation.
•
Improper valve train timing.
•
Faulty valve rotators.
•
Warped or distorted valve stems.
•
“Stretched” valves due to excessive spring tension.
•
Warped cylinder head.
•
Carbon build-up on valve seats.
•
Rocker arm failure.
•
Incorrect valve or seat installed.
•
Incorrect piston-to-valve clearance.
Improper Valve Clearance:
•
Inefficient use of fuel.
•
Engine starts harder.
•
Maximum engine power will not be achieved.
•
Shorter service life of valve train.
•
Greater chance for engine to overheat.
Excessive Valve Recession:
•
Worn valve seats.
•
Bent valves.
•
Debris passed through valve train.
CTM100 (06APR04)
02-020-22
P
OWER
T
ECH
10.5 L & 12.5 L Diesel Engines
040604
PN=94
Содержание 6105ADW
Страница 14: ...Contents 01 02 03 04 05 06 INDX CTM100 06APR04 ii POWERTECH 10 5 L 12 5 L Diesel Engines 040604 PN 2 ...
Страница 16: ...Contents 01 CTM100 06APR04 01 2 POWERTECH 10 5 L 12 5 L Diesel Engines 040604 PN 2 ...
Страница 50: ...Contents 02 CTM100 06APR04 02 4 POWERTECH 10 5 L 12 5 L Diesel Engines 040604 PN 4 ...
Страница 302: ...Cooling System 02 070 16 CTM100 06APR04 02 070 16 POWERTECH 10 5 L 12 5 L Diesel Engines 040604 PN 300 ...
Страница 328: ...Air Intake and Exhaust System 02 080 26 CTM100 06APR04 02 080 26 POWERTECH 10 5 L 12 5 L Diesel Engines 040604 PN 326 ...
Страница 330: ...Fuel System 02 090 2 CTM100 06APR04 02 090 2 POWERTECH 10 5 L 12 5 L Diesel Engines 040604 PN 328 ...
Страница 334: ...Contents 03 CTM100 06APR04 03 2 POWERTECH 10 5 L 12 5 L Diesel Engines 040604 PN 2 ...
Страница 341: ...Base Engine Operation 03 120 7 CTM100 06APR04 03 120 7 POWERTECH 10 5 L 12 5 L Diesel Engines 040604 PN 339 ...
Страница 348: ...Base Engine Operation 03 120 14 CTM100 06APR04 03 120 14 POWERTECH 10 5 L 12 5 L Diesel Engines 040604 PN 346 ...
Страница 350: ...Contents 04 CTM100 06APR04 04 2 POWERTECH 10 5 L 12 5 L Diesel Engines 040604 PN 2 ...
Страница 376: ...Contents 05 CTM100 06APR04 05 2 POWERTECH 10 5 L 12 5 L Diesel Engines 040604 PN 2 ...
Страница 412: ...Contents 06 CTM100 06APR04 06 2 POWERTECH 10 5 L 12 5 L Diesel Engines 040604 PN 2 ...
Страница 444: ...Diagnostic Specifications 06 210 8 CTM100 06APR04 06 210 8 POWERTECH 10 5 L 12 5 L Diesel Engines 040604 PN 442 ...