LBZ coolant loss solution?

[dmaxfireman]

I was doing some reading today.... this says oil mixed in with coolant but maybe its why some lbz guys lose coolant mysteriously?? i stopped using coolant when i took my stock turbo off so i think it may be applicable

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#PIP4704: Engine Oil Found In Coolant Surge Tank - keywords 6.6 6.6L bottle contamination cool cooling diesel LBZ leak LLY LMM mix mixing recovery - (Sep 23, 2009)

<table border="0"><tbody><tr><td width="100" valign="top">Subject:</td><td valign="top">Engine Oil Found In Coolant Surge Tank </td></tr></tbody></table>
<table border="0"><tbody><tr><td width="100" valign="top">Models:</td><td valign="top">2006-2009 Chevrolet Express, Kodiak, Silverado</td></tr></tbody></table>
<table border="0"><tbody><tr><td width="100" valign="top">
</td><td valign="top">2006-2009 GMC Savana, Sierra, Topkick</td></tr></tbody></table>
<table border="0"><tbody><tr><td width="100" valign="top">
</td><td valign="top">Equipped with the 6.6L Diesel Engine RPO codes LBZ LLY or LMM</td></tr></tbody></table>​

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The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern:

A dealer may encounter a customer concern of engine oil found in the coolant surge tank. A casting flaw in the turbo may cause oil to mix with coolant.
This casting flaw has just started to emerge. It will only occur on a new low mileage vehicle (5000 miles or less), or a vehicle that has recently had a turbo replaced.
If there is a casting concern in the center section of the turbo, it is possible for oil to mix with coolant.
Recommendation/Instructions:

If a dealer has encountered a customer concern of oil in the coolant surge tank (on a new vehicle or vehicle with new turbo) complete the test below.

1. Remove the engine cover and air cleaner components necessary to access the turbo coolant hoses.
2. Drain or lower coolant level as needed.
3. Remove the rubber coolant hose leading from the coolant bypass valve to the turbo inlet pipe.
   
   
   
   
4. Leave the short piece of hose connected to the bypass valve. Use a suitable plug and clamp to stop coolant flowing from this hose/bypass valve.
5. Run a length of hose from the turbo inlet pipe into a clear plastic bottle.
   
   
   
   
6. Remove the rubber section of hose from the turbo outlet pipe. This length of hose is located near the EGR cooler.
7. Run another section of hose from the outlet side of the turbo into the same plastic container.
   
   
   
   
8. Plug or cap pipe that leads back into the engine cooling system.
9. This will isolate the turbo coolant inlet and outlet into the clear plastic container, and make it so engine can be run with no coolant leaks.
10. Idle the engine at operating temperature and inspect for oil leakage into the container. Only coolant should be found in the pipes or clear plastic bottle. If oil starts to flow into clear plastic bottle the turbo has an internal casting flaw and should be replaced.

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.