1981/04/09 Caterpillar

Cooling System Cleaner Removes Rust And Corrosion


All Caterpillar Truck Engines

The 6V4511 Cooling System Cleaner is a solvent which will remove rust, corrosion and debris from cooling systems for Caterpillar Truck Engines.

The cleaner comes in a 1.9 liter (1/2 gallon) quantity, and is used in quantities of 1.9 liter (1/2 gallon) for every 30.3 liter (8 gallons) of cooling system capacity. It is added to the cooling system while the engine is in operation, and it is kept in the cooling system for 16,000 kilometers (10,000 miles). Then, the cooling system is flushed with clean water before coolant and cooling system conditioner are added. It is Caterpillar's recommendation that the 6V4511 Cooling System Cleaner be used one time a year or one time every two years if cooling system conditioner is used.

The 6V4511 Cooling System Cleaner can be used with glycol coolants. It must not be used with Dowtherm 209 Full-Fill.

The 6V4511 Cooling System Cleaner is not a strong solvent. If any of the indications which follow are present, special solvents and/or procedures must be used.

... Radiator tubes closed by rust corrosion or debris.
... Engine runs too hot, but the fan belt, the thermostat and the water pump all work correctly.
... Visible rust and green deposits (chromium hydroxide) are on the radiator cap and in the coolant. The coolant is so dirty that an antifreeze gauge can not be read.

More information on cooling systems can be found in "Questions and Answers About Cylinder Wall Pitting, " Form No. PEDP1101.

Caterpillar Information System:

1981/04/09 Two New Oil Filter Assemblies Available; Always Use Correct Oil Filter And Follow Caterpillar Change Intervals
1981/04/09 Special Studs And Nuts Available For Exhaust Manifolds On Engines Used In Heavy Load Conditions
1981/04/09 Correction To Torque Specification For Locknuts On Valve Clearance Adjustment Screws Of Engines Equipped With Jacobs Engine Brakes
1981/04/09 6V4163 Bit And 6V4164 Driver Now Available For Removal Of Bolts For Flyweight Carrier
1981/04/09 Low Engine Temperatures: Install Check Valve
1981/03/06 New Governor Spring Available For Specific Engine Applications
1981/03/06 New O-ring Seal Used In Egr (exhaust Gas Recirculation) Control Has Better Resistance To Heat Damage
1981/03/06 Check Oil Level Carefully To Prevent Operation With Too Much Oil In Engine Crankcase
1981/03/06 Two New Exhaust Manifolds Available For Replacement Of Single Rear Manifold To Prevent Broken Studs
1981/03/06 Do Not Adjust The Fuel Setting Or High Idle Higher Than Necessary
1981/03/06 Modification Of Flywheel Prevents Loose Clutch Pilot Bearing
1981/03/06 Later Pistons Have A Smaller Number Of Drain Holes In Oil Ring Groove
1981/04/09 Correct Refill Capacity For Engine Oil
1981/04/09 6V3197 Spacer, 6V3041 Tool Group Available For Use During Removal And Installation Of Piston Pin Bearings
1981/04/09 Clean Electrical Contacts In Exhaust Gas Recirculation (e.g.r.) Switch Group And Cover Assembly Before Installation
1981/04/09 Electrical Information For Egr (exhaust Gas Recirculation) Systems On 3208 Truck Engines So Equipped
1981/04/09 Improve Use Of Engine Service Manual Microfiche
1981/04/09 List Of Service Publications
1981/04/09 Check All Settings When Fuel Injection Pump Group Is Installed
1981/04/09 Use 6V4058 Universal Extension To Remove And Install Starter Bolts
1981/04/09 Fuel Pressure Relief Valve Is Shown Inverted (wrong End Up) In Parts Book Illustrations
1981/04/09 6V3150 Engine Pressure Group Gives Direct Indication Of Manifold Pressure
1981/05/12 Crankshaft Failures; New Thrust Plate
1981/05/12 New Tool Makes Glow Plug Wire Removal Easier
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