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MALF SENSOR MOUNTING GUIDELINES
MINIMUM 6" STRAIGHT SECTION
3"
TUBE
MALF SENSOR MOUNTING BOSS
MINIMUM 10" FROM THROTTLE BODY
Air Cleaner: It is recommended that a dry element air cleaner be used.
NOTE: Fueling cannot be guaranteed if an oiled element type air cleaner is used.
Oxygen Sensors
NOTE: It is critical that the Oxygen Sensor is mounted per the instructions below. The exhaust system MUST be properly
sealed – any leak near the sensors (upstream or downstream) can cause incorrect operation of the fuel control system.
Vehicle performance and/or driveability may be affected if sensors are not mounted as recommended or if an exhaust
leak exists. Leak check the exhaust system to ensure adequate sealing (even small leaks can affect fuel control).
Oxygen Sensor should be mounted in the collector area of the exhaust manifold in a location that allows exhaust from all
cylinders to be sampled equally (the stock exhaust manifolds include a mounting boss for the oxygen sensors). Be sure the
connectors and wiring are routed away from high heat areas. The oxygen sensor should be mounted with the sensor tip pointing
between horizontal and fully downward – do not mount with the tip oriented upward. Weld in the mounting bosses supplied (7/8"
hole) if using a header.
Positive Crankcase Ventilation System (PCV):
A crankcase ventilation system is used to consume crankcase vapors in the combustion process instead of venting them to
atmosphere. Fresh air from the intake system is supplied to the crankcase, mixed with blow by gases and then passed through a
calibrated orifice into the intake manifold.
The primary control is through the positive crankcase ventilation (PCV) valve orifice (2) which meters the flow at a rate depending
on intake manifold vacuum. The PCV valve is an integral part of the camshaft cover. Fresh air is introduced to the engine through
PCV (1) under normal operating conditions. If abnormal operating conditions occur, the system is designed to allow excessive
amounts of blow by gases to back flow through the crankcase vent valve (3) into the intake system to be consumed by normal
combustion. The connection of the PCV line should be upstream of the compressor inlet and at least 12 inches downstream of
the mass air flow sensor.
LTG Crate Engine Controls System
TITLE
ALL INFORMATION WITHIN ABOVE BORDER TO BE PRINTED EXACTLY AS SHOWN ON 8 1/2 x 11
WHITE 16 POUND BOND PAPER. PRINT ON BOTH SIDES, EXCLUDING TEMPLATES.
TO BE UNITIZED IN ACCORDANCE WITH GM SPECIFICATIONS.
AIRFLOW DIRECTION
TO AIR
FILTER
19328840
REV 03JA17
PART NO.
DATE
01DE14
Initial Release - William Duncan
03JA17
Revision - Blake Nye
MAF Sensor Mounting Area
UP
SHEET
REVISION
4
38
OF
AUTH
N/A
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