how to clean cdr valve 6.5 diesel

Crankcase Depression Regulator Valve
CDR

Fuel Filter Clause

February 3, 2022

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Cdr Valve

From the Manual:

The CDR valve is rattling standardised to a PCV valve on gas engine vehicles. It stands for Crankcase Impression Regulator. It's purpose is to recycle the exhaust gases that manage to get past the piston rings and into the crankcase.

If you're using a quart of oil every 1K miles you might want to get a load at their CDR valve.

The Crankcase Depressive disorder Regulator (CDR) Valve maintains crankcase pressure level. Imperativeness must personify regulated to keep oil consumption through the intake system, and to prevent oil leaks imputable undue buildup of pressure. Control is accomplished aside regulation the blow-by gases into the consumption system to be reburned. Inside the CDR valve, a spring holds unfastened a valve plateful that connects to the CDR valve torso with a pliant diaphragm. The valve plate is capable of restricting the outlet passage to the turbocharger air recess duct when airflow pulls it closed against the force of the spring.

Specifications
Crankcase insistence at idle . . . . . . . . . . . . . . . . . 0-1 in H 2 O
Crankcase pressure at 2000 RPM . . . . . . . . . . . 2-5 inch H 2 O

Crankcase Pressure Check
1. Bring the engine to operating temperature.
2. Obtain a water manometer (J23951)
3. Remove the oil dipstick and tie the hose of the piddle
manometer, to the dipstick tube.
4. Start the locomotive and detect the manometer at idle:
b" If the reading indicates that the crankcase pressure is 1
edge or H 2 O or less go to step 5.
b" If the reading indicates that crankcase pressure is highest
than 1 inch H 2 O inspect the CDR valve and recheck
crankcase pressure. (if the CDR valve is cracking check engine
compression).
5. Streak the locomotive at 2,000 RPM, observing the manometer.
b" If the reading indicates crankcase pressure is in a negative
state (-4 to -5 inch H 2 O), the system is OK.
b" If the reading indicates crankcase pressure is in a negative
state greater then -5 inches of H 2 O replace the CDR
valve and retest.
b" If the reading indicates crankcase pressure is in a positive
state, review test and results of step 4."

Actually, you can make a water manometer well. Get a few feet of some clear plastic tubing. Go up information technology to a board so you have a 'U' about 1.5 feet high on each side and about 3" wide. Fill it roughly 1/3 with piss and mark the water unwavering. Hook unitary side busy whatever you are testing and measure how many inches of water the level has changed.

AMG partly number is 5714132 and it costs around $84
Gram#25097699 Crankcase depression governor valve $44.98
ACDelco# CV910

The CDR valve is causative controlling the pressure/vacuum in the engine crankcase, and separating the oil mist from the air and reverting the oil to the crankcase. When the pressure builds up because the CDR is stuck nonopening the crankcase pressure leave increase, and could force oil color ago some gaskets and seals that could result in leakage.

If the CDR is cragfast capable oil mist from the crankcase will be sucked into the engine and burned as fuel, however, IT is heavier and thicker than diesel fuel and, having greater BTU output, causes excessive high temperature in the cylinder. After a period of time, cylinder and top dog temperatures will reach intolerably high levels causation the head bolts to stretch and the head gasket to fail.

A quick way to inspect your CDR valve is to remove the air cleaner assembly and look into the publicise intake with a flashlight. If you see locomotive oil obnubilate in the consumption manifold, test it out per the instruction above or get a new-sprung same.