Chrysler 2000 LHS Owner's Manual page 969

9 - 88 3.2/3.5L ENGINE
DIAGNOSIS AND TESTING (Continued)
COOLING SYSTEM TESTER METHOD
WARNING: WITH COOLING SYSTEM TESTER IN
PLACE, PRESSURE WILL BUILD UP FAST. EXCES-
SIVE PRESSURE BUILT UP, BY CONTINUOUS
ENGINE OPERATION, MUST BE RELEASED TO A
SAFE PRESSURE POINT. NEVER PERMIT PRES-
SURE TO EXCEED 138 kPa (20 psi).
Install Cooling System Tester 7700 or equivalent to
pressure cap neck. Start the engine and observe the
tester's pressure gauge. If gauge pulsates with every
power stroke of a cylinder a combustion pressure
leak is evident.
POSSIBLE NOISE SOURCES
Spongy/soft/aerated lash adjusters.
Missing lash adjuster swivel contact pads.
Intake rocker-to-camshaft bearing journal contact.
Rocker arm bind-up.
Intake rocker arm-to-spark plug tube contact.
Excessive cam end play.
Broken valve spring.
Broken/loose camshaft sprocket bolt.
Incomplete cam lobe machining.
Cracked lash adjuster cartridge body.
CHEMICAL TEST METHOD
Combustion leaks into the cooling system can also
be checked by using Bloc-Chek Kit C-3685-A or
equivalent. Perform test following the procedures
supplied with the tool kit.
LASH ADJUSTER (TAPPET) NOISE DIAGNOSIS
Proper noise diagnosis is essential in locating the
source of a NVH complaint. Locating a lash adjuster
(tappet) type noise can sometimes be difficult. As a
result, an initial misdiagnosis may occur.
Refer to the following chart indicating possible lash
adjuster (tappet) noise sources and possible sources
that could lead to a misdiagnosis.
Refer to Lash Adjuster (Tappet) Noise Chart for
Possible Causes and Correction of a lash adjuster
(tappet) type noise.
POSSIBLE NOISE MISDIAGNOSIS SOURCES
SRV valve axle chatter.
Exhaust rocker arm-to-cylinder head cover contact.
Piston pin bore fit.
Timing drive hydraulic tensioner tick.
Accessory drive belt deterioration.
Piston-to-bore clearance knock.
Crankshaft bearing noise.
LH