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I've never been a fan of the Detroit Diesel 6.2L engine that was so popular in GM trucks from the 1980s, probably because the GMC C1500 that my dad had as a shop truck was about the slowest vehicle I've ever experienced. With 130 HP on tap, a sundial could have been used to measure acceleration. The weak performance of these vehicles means that many are now available for next to nothing, which makes the prospect of doing a performance-oriented rebuild somewhat attractive. Diesel Power walks through this process, updating their 1982-vintage engine with later-model parts and then tossing on a Banks turbo system for good measure. The results? About 190 HP and 350 lb-ft of torque, if I'm reading things correctly (a dyno graph might have been nice). I'm a big fan of oddball projects, but considering the estimated cost of $4,500 for this project, I'd either go with a gas small-block for a lot less money, or invest the same dough into finding a healthy used B-series Cummins I6.

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    • 1 Second Ago
      • 9 Years Ago
      I will go for the Cummins!!!!!!
      • 9 Years Ago
      Yeah for sure. The 6.2 was a serious pile of shit in the early 80s. Seen that engine in the shop too many times to count. Customers who owned them were constantly buying parts. Not durable at all. Certainly no Cummins!
      • 9 Years Ago
      "The Colorado is a GM design!" Technically, yes, but that's like saying the the G6 is a Pontiac design. The Colorado/Canyon are essentially an Isuzu D-Max (sold just about everywhere outside of North America) with GM engines, transmissions, and some minor tweaks on the sheet metal. The "Isuzu" pickups sold here are rebadged Colorados, because the chicken tax keeps out the real Isuzus and their direct-injection gas and diesel engines.
      • 9 Years Ago
      Boat anchor! but still better than the Olds 5.7L Diesel. GM`s Diesels are nothing short of an embarrassment for the company Good thing they have Isuzu.
      • 9 Years Ago
      • 9 Years Ago
      Wait a minute! That wasn't a Detroit Diesel! It was a modified Olds Gasser V8 engine. They were terrible. The one's used in the Cadillacs and Olds cars were terrible, and they used that same engine in the Chevy P.U. trucks. It was a gas engine that was re-engineered into a diesel. They re-inforced the internal webbing in the block, heftier rods, crank, but it was a gas engine just the same. It was not a Detroit diesel if I recall. It was noisey as all heck too. My father-in-law just parked his chevy 6.2 Olds Olds/diesel and bought another make/brand P.U..
      • 9 Years Ago
      Isuzu diesels are fantastic. The Duramax is awesome, just wish it was being used in one of Isuzus own Full size trucks. I can say that sometime early 2010, we might just see one here. Isuzu is off the Hook with GM contractually this year (in a BIG WAY) and is rethinking its market strategy for the US. The gloves are now coming off. FINALLY. Isuzu will still sell its D-max pickups to GM (Colorado and Canyon) and also sell Duramax engines to GM as long as GM stays in business. Kinda Ironic the very company GM almost wiped out is very profitable in Japan and other countries and is helping keep GM afloat selling its own product to them. In my opinion, Isuzu and Cummins are the best there is with diesel engines. :)
      • 9 Years Ago
      130hp out of a 6.2 liter engine, i.e. 20 hp/L!!! Now there is the epitome of efficiency. I know diesels don't make the same hp/L figures as a gas engine, but come on that is bloody terrible!

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