Passing emissions with an engine swap
 

What involved? The catch here is I'll be repowering an s10 from a 4.3 to a 6.2L Detroit diesel.

As long as its newer.....

not true, must be same year or newer, and a stock configuration for the vehicle. The diesel swap will never be "legal" in a s10, because the s10 never came with a diesel

however, since NJ will be doing away with everything but tail pipe, if you can get it to pass tail pipe somehow, maybe you can slip by?

but if its an OBDII s10, itll be more complicated than a probe in the tail pipe.

youll have to look into all the specific regulations and laws to see what you have to do.

doesnt nj have a separate inspection for modified vehicles? i heard something about it last year. it does seem a lil backwards that you would need to pass for the vehicle and not the engine though imo. however diesel's are better that gas. as long as you can get the sensors to read, you should be ok

there was an S10 deseil back in the early 90's

The s10 was powered by an Isuzu diesel at one point. However, since your specific vehicle came from the factory powered by gasoline I think its different. I don't think its a truly "legal" swap.

If you talk to some private inspection facilities, they may just hook it up to the sniffer and ignore the diesel knock and not look under the hood. I would imagine you could get it to pass emissions. I don't really see anything wrong with it as long as it meets the standards of that vehicle, but I don't think the state feels the same way.

What year truck is it? If its an '85 or older you could look at a classic registration. But I think the DMV played with the rules on 'historic' QQ registrations

diesel emissions won't pass a gas sniff test :rofl:


i'd jump through hoops on the mvc hotline, 1-800-bendover

Well I got some more info on this.

From what I've been told NJ doesnt emission test diesels under 16,000lbs. So I would have to do whatever paper work required to get the vehicle marked as repowered and then would be exempt.

just wondering one thing, why the diesel swap? and at that a 6.2?

Diesels emit less hydrocarbons and CO2 than a gasoline engine, while emitting more NOx gasses. I remember my last private inspection NOx gasses were not measured, only CO2 and HC. You may be right in that the 6.2 may not run very clean. I don't know much about them, emissions wise.

Diesel swap because I've never had a diesel before and happen to like them.

Mileage, fuel range, grunt for moving big tires, no offcamber/hill issues offroad like carbs and 1 wire to run it.

6.2 because theyre cheap, are a very misunderstood but reliable motor, and will do what I need just fine.

I would love to toss a 4bt in this truck but the hype around Cummins drives the prices up so bad its ridiculous. A core more is $800. I could get a low miles 6.2 for $300-400, do headgaskets and head studs for reliability, water pump and timing gears and have a whopping $800 said and done into my motor.

the the fuel mileage is a joke, my buddy only gets 18 on the highway wit his and 15 around town, they can go 500 miles because most diesel trucks have 40 gallon tanks

but if you want a diesel, save yourself alot of headaches and just buy a early to mid 90s 2500/3500 truck, i agree the detroit is a better motor then the izuzu but its like a LSX swap in a 4th gen LT1 car, yea you can do it to be different but its cheaper and easier to by a LS1 car

Except I dont want a fullsize truck. Plus the 6.2 is a cheap swap. Theres nothing expensive about it. No harness, no ECU, no huge drivetrain changes (not that I wasnt doing that anyway).

Fuel mileage is no joke either. With a J code manifold with EGR delete and a timing chain thats not loose 6.2s can pull 20-30 mpg depending on driving condition.

i doubt a 6.2L is gonna bolt up to a v6/I4 tranny(dont kno which you have), there is some wiring and ecu control, esp in a GM(has been since the late 70s? i think) the fuel system is going to ahve to change, you need a lift pump, the wiring and the fuel block(should be part of the motor) yes diesel run on compression and not spark, i beleive the 6.2ls used a glow plug might be a toaster element, something to heat the air or fuel mixture when its below 40*F. if you can do it right and cheap, go for it, i wanna see stacks on that bitch tho:lol:

What's the front axle rated for in the S10. I don't know much about the 6.2L's, but you might be seriously overloading the front suspension and braking capabilities of that truck, to the point where its dangerous. I don't know, but if the 6.2L is anything like a Cummins 5.9L from standpoint of weight, look out below.........

Interesting swap though. And I do know people that have gotten very very good mileage (mid 20's on the highway) with the 6.2L, but they generally don't make much grunt. My 5.9L will do low 20's on the highway no problem and on a long trip can pull 23-24 unloaded open road and still pull your house off its foundation.

Looking quick the fully dressed weight of a 6.2L is about 725lbs +/-, a fully dressed SBC (iron head/intake) tips the scales at 550-600lbs +/-. That's pretty big jump and doesn't include rad upgrades, hydro-boost for steering and brakes etc etc. The front end of that truck is going to be asked to shoulder pretty hefty load? Any kits out there to address this?

If you are gonna run stacks, this is how you run stacks.....

http://www.youtube.com/watch?v=RoOrSuJFG4c

How fast do you think the locals would pull you over for that behavior?


Caution you might have some redneck in ya if you watch this more than once:

http://www.youtube.com/watch?v=Krqt_w6NSJM

I personally think the 6.2 would be better off in a full size truck. A regular cab longbed chevy with the 6.2 really isn't that big of a truck. Not even that heavy either. The chasis is better suited for that engine as well. Pulling trailers, doing work.

You mentioned you've never had a diesel, maybe it would be good to get into a full size and determine if you'd really want to swap it into an s10. I'm not going to lie, the thought has crossed my mind. But the S10 chasis just isn't suitable for the work those diesels can do

Knowing the OP, I would imagine that the stock suspension will be long gone in this truck. It will likely be lifted and spend all / most of it's time in the woods. Am I right Vinnie?

- Justin

^This. Especially with the "can handle off camber angles" comment. :mrgreen:

I've heard all sorts of negativity about those 6.2s, but I can remember my buddy had one when we were in H.S. His father was (Still is, I think) a GM dealership mechanic and swore by diesels, and I can remember that he scoured the state looking for his truck. He loved that thing, and raved about the mileage and power. It definitely smoked more than the modern diesels, and was louder as well, but very reliable. I'm interested to see this happen.

All this talk about GM diesels has got me kinda interested in them lol I might have to play around with one some time. Does the 6.2 have the injection pump problems the newer GM diesels had? I don't know too too much about them, I just know my friend was changing them every 70k in school vans, and I personally got stuck due to a bad injection pump in 11th grade up in Massachusetts, so I never had much favor towards them.

Lol Justin is right. You guys are just being silly. Stock front end HA. The only thing Justin got wrong is that this isnt going to be just a woods truck. Its gonna be built with street comfort in mind for camping trips and medium duty wheeling. It will have detachable swaybars for street handling on road.

The truck will be solid front axle on leaf springs. v6 toyota axles front and rear with chromoly shafts. Stronger ratings then the dana 44/10bolt front that came under the fullsize 3/4ton with the 6.2

Transmission will be a later model nv3500 with a full size 241 with a rear slipyoke eliminator running cv shafts front and rear.

Front of the frame will be boxed not that I dont doubt the s10 frame could handle it stock but just for assurance. The 6.2 weighs the same amount as a big block which theres plenty of s10s running around with BBC in them.

As far as a fullsize. I have a fullsize right now. And yes it is bigger when you get in the woods, much bigger.

1) eh thats for the hardcore racing diesels, if its a street/off-road truck, dual stacks, up the outside of the bed behind the cab, but have the bed notched so the stacks arent sticking out past the cab

2) so just cause i watched it 100 times, im a redneck?:rofl:

No stacks its gonna be a blazer and even then no stacks. Single 4in pipe dump out the back.

Nice. I know theres a c4 floating around somewhere with a 6.5TD stuffed under the hood.

That thing is redneck as hell but it looks like it was done rather well honestly.