• Cars

    Diesel on a Diet

    By Posted on 10.6.2008 9 Comments

    To make its Duramax 4.5 diesel cleaner and leaner, GM turned traditional engine design inside out and dumped 70 parts. The biggest change was flipping around the exhaust system to direct hot gases through short pipes toward a central turbocharger and catalytic converter inside the “V” of the engine. This compact design harnesses more exhaust heat and requires fewer components than conventional V8s, which send exhaust through long manifold pipes that protrude from each side of the engine, taking up more space and losing heat before they reach the turbo.

    10.23.2008 at 12:11am - Comment by stealth1

    How long will it be before we see major recalls like we did with the Ford 6.0? People and engineers push these new engines into the market before they actually test them for durability. It has been my experience that durability decreases when displacement decreases. There is a reason a semi engine weights 2000lb and can go 1 million miles without major overhaul. Smaller engines require tighter tolerances, which leaves less room for error and wear. I am not saying that a small engine can be durable, just look at Honda’s. Something that needs to be considered though, Honda did not develop their engine overnight, and they have stuck with a similar design for the past 15 years. I feel that a good quality design company doesn’t need to design a new engine every three years, but they need to make small changes to better the one they already have. If GM is successful, great, but the likelihood of their success is slim. I predict that the engine will hit the streets only to be pulled off two years later because of major complications. What is going to happen to the ones on the road? It seems as though you will be stuck with a truck or car that has no trade in value and worst case scenario its broke. I am open to new ideas but this kick the auto industry is on with a new engine every 6 months is getting old. New engines mean new parts, new parts mean new part prices, and new part prices just add an accelerant to an already wounded economy.



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