D22 is ZD30...Quote:
Originally Posted by c.h.i.e.f
only the D40 2.5
Printable View
D22 is ZD30...Quote:
Originally Posted by c.h.i.e.f
only the D40 2.5
The ZD30 left the D22 building quite some time ago. D22's have had the same commonrail YD25 for years now. A breif check of secondhand ads shows the last ZD30's being around 2007.Quote:
Originally Posted by klappers
From the outside it's easy to tell the difference, the older YD25's used in the 2WD D22's have the hood scoop colour coaded and creased into the bonnet. The later commonrail YD25's in 2wd and 4wd have a black scoop which visually sits on top of the bonnet. The ZD30's have no scoop.
And it doesn't have to be 'highly stressed' if the block, crank and heads are designed for the power and torque, regardless of the swept volume.Quote:
Originally Posted by Dougal
If built properly, a 2.5l common rail engine that is highly turbo'd just means a weight penalty over a 'car duty' design.
The technology is certainly available to enable 40 or 60psi boost with staged or compound turbo's :D
"the candle that burns twice as bright burns only half as long"
getting higher amounts of power and torque from a smaller capacity would have a direct effect on longevity, no?
Sam
IMO no, if the pistons, rods, crank and block were designed properly.Quote:
Originally Posted by series3
Technology has come a long way.
The new Navara STX has the 2.5L donk more finely tuned to get 450Nm.
Its absolute wicked, I tow a tandem trailer with a 2ton Kubota excavator with spare buckets, ramps etc up greenhill road(pretty steep) and it does it very well indeed.
The early issues Nissan had with their clutches burning out has been sorted.
The motors are dead quiet, well sort of anyhow, depends what you are comparing it to.
Navara also has the option of the 3l turbo V6 donk same as Land Rover but I didn't drive it as price was too high and I probably would have wanted that or nothing once driven.
But the candle holder doesn't mind how quickly you are burning the candle.Quote:
Originally Posted by series3
I think your analogy is flawed...
Yep...whatever.Quote:
Originally Posted by isuzurover
'Flawed Analogies' aside- thank you for skilled literary observations :o)
What are we talking about here?
When is a you beaut 'Nissan Navara' going to cut the mustard when it comes to longevity and outright strength? They build 'em quick and they go fast and this is all interesting and such but they are on a different plane...
And rocket scientist observations around engineering quality aside- these things (Nissans, Toyotas, Huyundais and Jeeps and other go fast diesels including the fantastic plastic later offerings from L/R) are 'unlikely' to see the distance/low maintenance needs we can achieve.
Common rail contraptions are just lovely- wait till you get two bad batches of fuel and the pathetic filter arrangement is overwhelmed and wait! I can't find the right filter element out here in Bourke or Mt Isa so I'm in trouble.... I need a specialised test bench to recalibrate the auxiliary filter housing barometric pressure sensor and the only one is in (....insert capital city....) and it isn't covered by my warranty and so on and so forth and endless gnashing of teeth and regrets 'What was I thinking....'.
Get with the program rocket scientists and dedicated passionfingers. There are a few good reasons to drive a 110 isuzu. They are NOT pretty or fast...
Deal with it.:twisted:
I'll stick with the old stuff as well: I live on a continent where they cut the diesel with paraffin and other exotics, and consider 500PPM as being low sulfur diesel.......:o
I'm on the Nissan4x4.co.za forum, and every day there's a Navara or Pathfinder owner moaning about his YD25.
The simple fact of the matter is that the isuzu is a truck engine, and therefore has a much longer design life than a car/4x4 engine.
Car/4x4 engines are considered to be throwaway items by engine designers I have spoken to.
So a commonrail small truck engine could be expected to last as long as a 4BD1(T).