Is a Duramax 6.6 diesel old or new technology

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Joined
Mar 3, 2004
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OZ
I ask this question as I am from OZ and am wondering about this motor as I am thinking of buying a 3500 pickup. My brochure says "Sophisticated electronic injector control uses pilot injection for quieter, smother operation. Does the "pilot injection" refer to the older style indirect injection or pre burning, or is it some fancy direct injection technology
 
The bit I am not sure about is that in 1999 approx the engine went to electronic injection but I am not sure if the injection goes to a precombustion chamber or not. It is still a pushrod engine, ie non overhead cam.
 
it's fancy new technology.

2001 was the first year of the Duramax. It had injector issues that ran into the 2002 model
 
These Duracrap engines CANNOT take any water, ANY. It kills the injectors right away- I've seen it. And GM has not done enough to block water from the fuel system. Oh, and the injectors are approx. $800CDN a piece here.
 
and out come the haters ;)

It killed the old injectors, the new injectors are much more tollerable.

and GM has added a second fuel filter and seperator from Racor to try and solve both the dirty diesel issues and the water issues. I believe it was in 2005. i also believe they moved the fuel rail and injectors outside of the valve cover at the same time to make servicing the inj easier...

Izuzu makes a great engine. It's when GM gets their fingers in it you that have to be worried.
 
Yah in all remember it is a Izuzu engine. So it cannot be all bad. Just the truck is s*** around it.
 
brownbear said:
Yah in all remember it is a Izuzu engine. So it cannot be all bad. Just the truck is s*** around it.

Isnt it the same old chev block that GM has been tinkering with for years?
I thought they just handed it to Isuzu to make something of it.
 
BC Cruiser said:
What ever you do please don't buy a ford 6.0L diesel..... pieces of crap

Please tell me more.

In Australia we have had the F250/350 the last couple of years with the 7.3 l diesel with the 4 speed auto, manufactured in Brazil, RHD, but they have stopped importing them now as the emissions standards have gone up here (Second hand one went up $10K overnight).
There are companies importing LHD Fords with the 6 litre diesel, 5 speed auto, and converting them to RHD, as well as the Chev Silverado/GMC Sierra 6.6L Duramax with 6 speed Allison auto.
The thing about the fords is that due to them previously being available in Australia, lots of parts/panels will be readily available and the resale may be better? If I decide to go for one of these vehicles, I intend keeping it longer term, and realise resale will be poor, but if it does the job and suits me than that will be fine. The Silverado seems a better finished vehicle than the ford and with the Duramax and 6 speed auto, it is preferrable to me, but these thing are ridiculously expensive so a secondhand Ford may have to suffice.
However any info on the engine/drivetrain is appreciated. I have heard the new Sliverados have also gone to a coilover front suspension.
 
Well for starters it costs about $90 for just the oil and fuel filters. All the ones I have worked on seem to leak oil around the back of the valve covers. I've also heard that ford has been having some trouble with this new engine and might switch back to the 7.3PS (just remours so far). Also if you don't run the oil ford specs for the engine, the turbo seals will leak, and you will have oil weaping out of the all the boots on the intake system. You might be better off with a second hand 7.3PS diesel.
 
The Dude said:
and out come the haters ;)

It killed the old injectors, the new injectors are much more tollerable.

and GM has added a second fuel filter and seperator from Racor to try and solve both the dirty diesel issues and the water issues. I believe it was in 2005. i also believe they moved the fuel rail and injectors outside of the valve cover at the same time to make servicing the inj easier...

Izuzu makes a great engine. It's when GM gets their fingers in it you that have to be worried.

Bull#$*&. The new injectors have the same issues. And, they do not have proper water blocking technology to match their candyass injectors. The truck that we had fail was a 2005 with 5000kms on the clock. Working in the bush and fueling out of drums can lead to some fuel contamination. We were running a Cummins, a Ford- both fairly new, and of course my old 3B. Only the GM suffered any problems and man did it suffer. Of course GM refuses to warranty any problems as a result of water in the fuel.
 
100 TD said:
I ask this question as I am from OZ and am wondering about this motor as I am thinking of buying a 3500 pickup. My brochure says "Sophisticated electronic injector control uses pilot injection for quieter, smother operation. Does the "pilot injection" refer to the older style indirect injection or pre burning, or is it some fancy direct injection technology

The Duramax was a completely new engine, definately not related to the previous 6.2 and 6.5 engines. It was a joint venture between GM and Isuzu, using direct injection, common rail high pressure fuel system and alloy heads.

Pilot injection is used in several common rail applications I know of with electronically controlled injectors. Pilot injection refers to the method of squirting a small % of the total injection volume first, to start the flame burning and then squirting the balance in. It all happens really quickly of course, and reduces diesel knock noise and promotes smooter running, particularly when cold.
 
mac said:
Only the GM suffered any problems and man did it suffer. Of course GM refuses to warranty any problems as a result of water in the fuel.

So what happened exactly andwhat had to be done to fix it?

Could this have been prevented by an extra water trap?
 
100 TD said:
So what happened exactly andwhat had to be done to fix it?

Could this have been prevented by an extra water trap?


You would think so

Why dont you wait for the new wide body landcruiser tray top with the V8 diesel:D
We need a test pilot;)
 
roscoFJ73 said:
Why dont you wait for the new wide body landcruiser tray top with the V8 diesel:D
We need a test pilot;)

Well I don't think they are bring it out in a Crew Cab, I have a wife and 3 kids to fit in as well! A Hilux dual cab is too small in the back.
(Plus i am THINKING about a 2500 or 3500, more research needed yet to see if thats really what I want)
 
100 TD said:
Well I don't think they are bring it out in a Crew Cab, I have a wife and 3 kids to fit in as well! A Hilux dual cab is too small in the back.
(Plus i am THINKING about a 2500 or 3500, more research needed yet to see if thats really what I want)

Are you looking for a new 2500/3500 (Suburban?)
I thought they took them off the market.
 
roscoFJ73 said:
Are you looking for a new 2500/3500 (Suburban?)
I thought they took them off the market.

Silverado or Sierra or Ford 250/350, Crew Cab or Dual Cab, Pickup/Ute
 
C'mon haters

I have a 2005 2500HD and that Duramax kicks some seirous ass. I know out planting they did not have the same reliability with the GM injectors, BUT we did not want to buy the Ford or Dodge because the ride is 1000000x worse. My Grandfather has a 2000 Duramax, and it was been awesome for him, ZERO problems. On a gravel road you can drive twice as fast (safely) with the GM, because it rides better than the Ford/Dodge.

I guess if your a total bushmaster and are taking fuel from drums and stuff its not the best. BUT if your getting fuel from normal pumps you dont need to worry about the injectors, and its a better engine than the Cummins and Powerstroke hands down.
 
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