GM och deras hyllvärmare Duramax 4500

Det kommer fler och fler indikationer på att den av GM malpåselagda Duramax 4500 med block i CGI är på väg att återgå och kommer i produktion.

Image: DURAMAX-V8-1.jpg

Mortimer skriver nu:

But the bigger question is: Will GM revive its ideas for a 4.5-liter Duramax 72-degree V-8 diesel (code-named LMK) in its full-size half ton trucks? This project hit the rocks amidst The General’s financial woes. The project was cancelled in 2009, and it was reported earlier this year that GM vice president of global powertrain, Steve Kiefer, had made various comments to the effect that GM could “dust off” the 4.5L diesel engine.


Tidigare i år har ledande personer uttalat att GM kommer att satsa mer på diesel framöver.





This engine is not yet commercially launched although it was touted in the automobile press as one of the most important new engine concepts for small trucks and SUVs by finally delivering a capable diesel engine in a compact enough package. The engine project is current on indefinite hold by GM. General Motors planned a 4.5-litre 72-degree[9] V8 for light-duty applications which would be built at GM’s powertrain facility in Tonawanda, New York after 2009. Designed to fit in the same space as a Chevrolet Small-Block engine, it is expected to produce over 310 bhp (230 kW) and 520 lb·ft (705 N·m) of torque. It added urea injection, 29,000-psi (2,000 bar) piezo-electric common-rail fuel system over previous Duramax architecture.[10]

It was initially targeted for the Chevy Silverado/GMC Sierra and Hummer H2.[11] Unlike previous Duramax engines, the 4.5-liter is planned to be designed and built entirely by GM, without assistance from Isuzu.[12]

As of March 2009, a GM spokesperson stated the engine project has been put on an ”indefinite hold” due to current economic conditions



Tonawanda stod helt klart 2009 att börja producera denna motorn med Sintercast CGI i blocket då den ströks och man tryckte inte på knappen till produktion. Sintercast fick stryka 500.000 årliga ekvivalenter ur orderboken. Detta blev början till kursfallet från ca 170 kr till ca 35 kr.

Om den kommer igen så är det givetvis en succé för Sintercast.

”Technical highlights of the engine include aluminum cylinder heads with integrated manifolding; a variable-vane turbocharger with intercooling; a Compacted Graphite Iron (CGI) block for a stronger and lighter engine base (compared to lower-strength aluminum or heavier grey cast iron)”

2010 var man på gång