Coolant Draining (Changing Coolant) And Filling - ILMOR 2011 MV8 User Manual

• Drain heat exchangers of raw water.
• Open cooled systems will have an oil/transmission heat exchanger.
• Remove heat exchanger end caps and allow draining.
• Closed cooled systems will have an oil/transmission and engine heat exchanger.
• Remove heat exchanger drain plugs and allow draining.
• Reinstall exhaust manifold drain plugs, engine block drain plugs, and heat exchanger
end caps/drain plugs after all the raw water has been drained. If any other components
contain raw water, such as a water heater, drain them now.
• Torque knock sensor retaining nut to 15 lb-ft.
• Remove the coolant cap to allow for an air bleed.
• Remove the exhaust header feed hoses to the thermostat to allow for an air bleed.
Remove the 1 ¼" hose between the engine and heat exchanger. Allow all of the cool-
ant to drain.
• Drain both exhaust manifolds by removing the end plugs on the bottom rail.
• Drain the cylinder block:
• 5.7L: Remove knock sensors on both sides of block.
• 6.0L: Remove the electric heater 17mm Allen plug from the engine block raw
water pump side. Remove the 10mm Allen plug on starter side of engine block.
• 6.2L: Remove the electric heater 17mm Allen plug from the engine block raw water
pump side. Remove the 10mm Allen plug on the starter side of engine block.
• Re-assemble all hoses and drain plugs once all coolant has drained.
• Refill cooling system with ILMOR antifreeze. Use premixed 50/50 or use a 50/50 mix
of ILMOR antifreeze and distilled water. The cooling system will take between 5.8
gallons (22 L) to 6.8 gallons (26L) of coolant.
• With the coolant cap off, cycle the engine speed from idle to 2000 rpm in 10-second
intervals while engine temperature is below 104 F (40C). Refill the coolant reservoir
as needed.
• Install coolant cap.
• Cycle engine speed from idle to 3000rpm in 30second intervals until the coolant tem-
perature reaches 76C (169F).
• Shut off the engine.
• Top off coolant reservoir as needed.
• Cycle engine speed from idle to 3000 rpm in 30-second intervals until the coolant
2011 ILMOR MV8 Owner's Manual • Page 34
Coolant Draining
(Changing Coolant)
and Filling