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Old 01-08-2011, 03:26 AM   #1
jeffro
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Updated front engine cover

Thought you guys would like to see this. Today at work I installed a new updated front engine cover on a customer's 6.4L. The new design is to hopefully stop the water cavitation issues that are causing front cover failures. We are still waiting for a thermostat fix. There is a new radiator design in the works also I am told.

Old cover with damage.
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Updated new cover.
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Old 01-08-2011, 03:16 PM   #2
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just curious, what cause cavitation?? how many miles on the truck??
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Old 01-09-2011, 03:24 AM   #3
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Very interesting. It would seem that there is/was a design flaw causing areas prone to cavitation. I wonder if they will ultimately issue a recall / TSB on this.
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Old 01-10-2011, 12:03 PM   #4
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Not sure what causes the cavitation issue. I think it has to do with water pump speed. It usually is found on the 450/550 trucks. Probably due to the lower gear in the rear end causing the engine to turn more RPM while driving. Some trucks have 30k, some trucks have 120k. We have a fleet company that some of their trucks go through covers in about every 12k. Hope the new cover is the fix.....
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Old 01-10-2011, 03:38 PM   #5
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hopefully that solves the issue keep us posted
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Old 01-10-2011, 04:36 PM   #6
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The tab they added will certainly change the fluid flow, presumably eliminating areas of low pressure prone to cavitation. I would hope they issue a recall / TSB on this so we can all get the new covers prior to a cavitation eat through and the collateral damage that causes.
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Old 01-10-2011, 04:53 PM   #7
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Where does the cavitation cause coolant to leak to? Out of the front of the cover, or into the engine?
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Old 01-10-2011, 05:35 PM   #8
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Quote:
Originally Posted by cartmanea View Post
Where does the cavitation cause coolant to leak to? Out of the front of the cover, or into the engine?
Oil leaks out into the coolant when the engine is running, since the oil pressure is higher than the coolant pressure. When the engine is off and both pressures drop to zero some coolant leaks back into the engine. It makes a heck of a mess and can do a lot of damage.
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Old 01-10-2011, 05:37 PM   #9
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Yikes...
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Old 01-10-2011, 09:42 PM   #10
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Usually coolant goes into engine crankcase. The hole ends up right in front of camshaft area. Cooling system pressure is higher than crankcase pressure. If you add water then you will fill engine with water. I have had some customers add up to 8 gallons of water trying to fill system. Some oil does make it into coolant though. I have also seen a hole in the bottom causing an external leak.
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