Duramax Diesel, 6.2/6.5 GM Diesel, Duramax Problems, Issues and Answers

LLY Overheating: The GM Solution and Beyond

6.5L Diesel Land Speed Racer: Beginnings

Duramax Diesel Fuel Systems: Electronic Components

LLY Overheating: The GM Solution and Beyond Faced with runaway overheating and a thermal feedback loop in his LLY Duramax, Joel Paynton finds the GM LBZ cold-air intake upgrade a measurable improvement. But with one additional LBZ part, omitted in the GM service bulletin, he finds his LLY running significantly cooler – with more power.

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Direct Oil Cooling, Part 2 Discover why direct cooling, properly engineered, offers the only solution that can control 1. Oil temperature, 2. Viscosity and 3. Flow rate to design specification limits under high load/high RPM conditions.

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6.5L Diesel Land Speed Racer: Beginnings In 1978, Bill Heath envisioned himself racing at Bonneville. That vision remained out of reach until last Year. Now, he plans to race there this Summer – in a 6.5L GM Diesel of course...

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Duramax Diesel Fuel Systems: Electronic Components Joel Paynton continues his series on the Duramax diesel fuel system with an overview of the electronic components, their function and common issues.

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Lube Notes: Grease Lube
DMax I+A

In previous Lube Notes we looked at the role lubricants play in overcoming the effects of friction. In this installment, I want to examine one specialized type of lubricant: grease lube. Looking at previous civilizations, we can see that man has tried several methods to provide basic lubrication to load-bearing surfaces; axles have presented one of the most challenging applications. As far back as 1400 BC, mutton fat and beef tallow were used on chariot axles to reduce friction in order to allow for more speed and to slow down wear. One can only imagine the pressure on the maintenance men to make the chariot go faster and to avoid axles catching on fire from the continuous friction. While there is evidence of lime being added to these fats in order to make their lubricating properties last longer, few other improvements to the composition of grease are known to have been used until we reach the magic year of 1859.

In this feature...

Using the Right Grease for Your Vehicle
Grease Lube Compatibility

Read Lube Notes: Grease Lube for Your Vehicle...

Joel Paynton provides the responses for the Duramax section of Issues & Answers. Joel Paynton is an award-winning GM technician who specializes in Duramax fuel systems. He also does custom programming for any GM powertrain.