Engine distributors DSG-423 User Manual

DSG-423 GENERAL INFORMATION
01-17
Valve Train Analysis – Static
With engine off and valve cover removed, check for
damaged or severely worn parts and correct assembly.
Make sure correct parts are used with the static engine
analysis as follows.
Rocker Arm
• Check for loose mounting bolts, studs and nuts.
• Check for plugged oil feed in the rocker arms or
cylinder head.
Camshaft Roller Followers and Hydraulic Lash
Adjusters
• Check for loose mounting bolts on camshaft carriers.
• Check for plugged oil feed in the camshaft roller
followers, hydraulic lash adjusters (HLA) or cylinder
heads.
Camshaft
• Check for broken or damaged parts.
• Check the bolts on the intake manifold.
Push Rods (if equipped)
• Check for bent push rods and restricted oil passage.
Valve Springs
• Check for broken or damaged parts.
Valve Spring Retainer and Valve Spring Retainer
Keys
• Check for proper seating of the valve spring retainer
key on the valve stem and in valve spring retainer.
Valve Spring Retainer Keys
• Check for proper seating on the valve stem.
Valves and Cylinder Head
• Check the head gasket for proper installation.
• Check for plugged oil drain back holes.
• Check for worn or damaged valve tips.
• Check for missing or damaged guide-mounted valve
stem seal.
• Check collapsed lash adjuster gap.
• Check installed valve spring height.
• Check for missing or worn valve spring seats.
• Check for plugged oil metering orifice in cylinder
head oil reservoir (if equipped).
Static checks (engine off) are to be made on the engine
prior to the dynamic procedure.
Valve Train Analysis – Dynamic
Start the engine and, while idling, check for proper
operation of all parts. Check the following:
Rocker Arm
• Check for plugged oil in the rocker arms or cylinder
head.
• Check for proper overhead valve train lubrication.
If insufficient oiling is suspected, accelerate the engine
to 1200 rpm ± 100 rpm with the PTO in NEUTRAL or
load removed and the engine at normal operating
temperature. Oil should spurt from the rocker arm oil
holes such that valve tips and rocker arms are well oiled
or, with the valve covers off, oil splash may overshoot
the rocker arms. If oiling is insufficient for this to occur,
check oil passages for blockage.
Push Rods (if equipped)
• Check for bent push rods and restriction in oil
passage.
Positive Rotator and Valve Spring Retainer Keys
• Check for proper operation of positive rotator.
Valves and Cylinder Head
• Check for plugged oil drain back holes.
• Check for missing or damaged valve stem seals or
guide mounted valve stem seals.
If insufficient oiling is suspected, check oil passages for
blockage, then accelerate the engine to 1200 rpm with
the PTO in NEUTRAL or load removed and the engine
at normal operating temperature. Oil should spurt from
the rocker arm oil holes such that valve tips and
camshaft roller followers are well oiled. With the valve
covers off, some oil splash may overshoot camshaft
roller followers.

Engine distributors DSG-423 Specifications

General

Brand	Engine distributors
Model	DSG-423
Category	Engine
Language	English