PDA

View Full Version : 1994 Sierra 2500 6.5l diesel strong enough?


Grzube
02-05-2007, 01:56 AM
I,m thinking of buying another truck, a 94 /2500/6.5l diesel/160kms,one of my trailers is a 6 ton dump{max weight=9500 lbs}any suggestions guys?

ScagBoy09
02-05-2007, 02:08 AM
I think that diesel is more than capable to haul that.

LindblomRJ
02-05-2007, 05:30 AM
I would steer clear of the 6.5 diesel. Seems they have a problem with the oil pump and supply and only last about 180,000 miles. There are better options out there.

I have a 96 2500 with Vortec 5.7 not a bad setup.

Sydenstricker Landscaping
02-05-2007, 11:40 AM
Those motors are not bad motors at all. It is not an oil pump problem they had, its the injector pump failing. What goes wrong is the little computer on it gets over-heated and fries. That leaves the truck dead and they will try to replace the entire pump, lots of $$$$. When you could just replace that chip and be rolling again. I think you can relocate it to the firewall, out of the heat

Albemarle Lawn
02-05-2007, 11:29 PM
Fuel leaks, electronics, bad cranks, bad heads, you name it.

Stay away.

With high diesel fuel prices today, if you are considering old trucks, don't mess with those old diesels, get a big-block gasser, or even 350 gasser if the truck won't get to heavy.

Mowingman
02-06-2007, 12:18 AM
I had a 95, 3500HD with that engine, and it was a great truck. I believe that is a pretty good engine, after the fuel pump upgrades are done on it. Bought mine with 180,000 on it. It had been a wrecker in it's previous life. Used it to tow my mowing equipment trailer for several years, then sold it. The guy who bought it took it to Louisiana to tow mobile homes in after the big hurricane. It was still running great and had about 200,000 on it when he bought it.
Fuel mileage was pretty poor on it as I recall.

Gravel Rat
02-06-2007, 01:12 AM
I wouldn't be buying a 6.5 they are turd mobiles. The list goes on for miles with the problems those engines have. Right now I know of a 6.5 with a broken crank the same truck has 400,000 kilometers and its seen 4 engines in the last 12 years.

You say the truck has 160,000kms expect to replace the engine at 200,000kms but you will be doing the 5000 dollar injection pump before then.

The 6.5 won't have enough power to pull the scum off the top of your peasoup :laugh:

stroker51
02-06-2007, 01:29 PM
I used to work for a sod farm and we had one of those old 6.5 chevy diesels. It was a powerless turd. I've got an old F250 w/ the 351W, and it will out pull that truck at the sod farm. I've never heard very many good things about these engines. I'd look for a Powerstroke or Cummins in that year of truck if you want a diesel to do what a diesel is known for, power and fuel mileage. The chevy won't have either.

topsites
02-06-2007, 02:54 PM
As for an engine, so long the truck is properly geared, a 6-cylinder will haul 10+ thousand pounds.
It's not the engine, it's the transmission...
If that were not true, the Kenworth's 350 Cummins would never get its load down the road.
While I can appreciate 450+ cid's in an 18-wheeler, I don't see a need for anything much beyond a 5 liter for a p'up, maybe a 350...
All the 400+ cid's do is swallow fuel at astonishing rates, you don't actually get down the road that much faster.

But for hauling that kind of weight I would check into a bigger truck, like the 3500.

The 3/4 ton will pull 10k, but that's really pushing the transmission's limits.

topsites
02-06-2007, 03:10 PM
I take that back, it appears the Sierras 3500 line does sport 6.6 - 8.1 liter engines.
Which, that's around 396 - 490 cid...
And the Iveco Stralis (a mid-to-long haul 18-wheeler) sports 8 - 10.9 liter and bigger engines...
Which is 480- 650 cid (1 liter = ~60 cid's).
I was mistaken.

But I still think a 3/4 ton would be huffing and puffing considerably under a 10k load.
6 tons = 12k?

LindblomRJ
02-06-2007, 03:11 PM
As for an engine, so long the truck is properly geared, a 6-cylinder will haul 10+ thousand pounds.
It's not the engine, it's the transmission...
If that were not true, the Kenworth's 350 Cummins would never get its load down the road.
While I can appreciate 450+ cid's in an 18-wheeler, I don't see a need for anything much beyond a 5 liter for a p'up, maybe a 350...
All the 400+ cid's do is swallow fuel at astonishing rates, you don't actually get down the road that much faster.

But for hauling that kind of weight I would check into a bigger truck, like the 3500.

The 3/4 ton will pull 10k, but that's really pushing the transmission's limits.

450 CID? (7.4 liters) Your kidding. 12 to 14 liters is more common for dispacement in a semi. In Class 5 or 6 trucks the engine 8 or 9 liters

Gravel Rat
02-06-2007, 09:43 PM
The 600hp Cat engines are well into the 15 litre range not many trucks are spec'ed with 10 litre engines unless your pulling a light gross weight like 80,000lbs.

stroker51
02-06-2007, 09:50 PM
Topsites, a 3/4 vs 1 ton trannies are the same in most trucks as far as I know. A ZF5 Ford 5 speed is a ZF5 no matter whether it's in a 3/4 or 1 ton.
A 6 cyl won't come close to pulling 10K as easily or efficiently as a V8, small or big block.

muddstopper
02-06-2007, 10:13 PM
I bought my 95 3500 6.5 diesel truck in 1999. It never leaves the driveway unless it is loaded to the max. I pull a 28ft gooseneck with a 7000 lb tractor plus the weight of the FEL, and 7ft scrape. I live in the mountains and it seems everywhere is uphill. My truck has 170,000 miles on it now and I am pretty sure it will last past the 180,000 mile benchmark someone else suggested as the milestone for the engine. There are a few things to look out for. The Injection pump ($1700 installed and not $5000) usually fails because of the heat on the control modual, move it off the motor and onto the firewall and problem is solved. oil pressure sending unit supplies power to the fuel lift pump and sometimes fails. This causes the injection pump to work harder and wear out prematurely. Oil sending unit is $17. Wastegate acutator solenoid commonly fails. This prevents vaccumm from getting to the wastegate on the turbo. Results in poor fuel economy, black smoke, and loss of power. $40 and 5 minutes and a 10mm wrench to change. Basicly for $57 you can cure the biggest causes of the cussings the 6.5 engine gets for poor performance.

Another thing to consider is the gear ratios of the truck you are buying. Some of them come with 3.42 gears. These trucks are doggs when it comes to towing. Stay away from the high geared trucks unless you are prepared to burn out clutches or swap gear ratio's. You can swap out to 4.10 gears with just buying a ring and pinion. If you want to go lower you will need to also buy a carrier for the ring gear. They do make specialty gears that will allow you to put a 4.56, 4.88, or 5.13 gear on the high speeded carriers. Typical cost of new ring and pinions is around $300 for rear and $400 for front, if 4x4.

Of course a Duramax is a better engine, but bet one cost more than what you will have to pay for the 94 model 2500 truck.

muddstopper
02-06-2007, 10:17 PM
Topsites, a 3/4 vs 1 ton trannies are the same in most trucks as far as I know. A ZF5 Ford 5 speed is a ZF5 no matter whether it's in a 3/4 or 1 ton.
A 6 cyl won't come close to pulling 10K as easily or efficiently as a V8, small or big block.


I guess you have never compared the ford 300 6cyl against the ford 302's and 351 windsors have you. If you had you wouldnt have made the statement above.

stroker51
02-07-2007, 05:58 PM
I guess you have never compared the ford 300 6cyl against the ford 302's and 351 windsors have you. If you had you wouldnt have made the statement above.

I actually have. I've got 4 Fords at the moment. One has a 351 Windsor, one a 460, and 2 of them are powerstrokes. When I first started up, I had the truck with the 351, and my partner had a 300 I6, same gears, mine was a 4x4, his wasn't, both 4 speeds. His did ok with the mowers, but you put an 1825 Case skid steer on a trailer behind it, it wouldn't get out of it's own way. Put the 773 Bobcat behind it, you weren't going anywhere fast. Both trucks were right at about 10mpg empty, 8 or so loaded. This same partner had a 7.5ft Meyers blade on the front of a I6, 4x4 3/4 ton 5-speed, and in 8" of snow could only take about half a blade width, if that. I've had plows on wore out 351M trucks that could take a full swipe when opening up a lot. My blade trips long before my 460 runs out of power. My cousin has a half ton with the I6, bout 10-12 mpg, and there is no way it will even look at a 10K load,even if it was more than a 1/2 ton. I'm not saying anything bad about the I6's, they'll run forever I know of several over 250K, never been opened up and if all you're pulling is mowers, go for it. But I'll hook up either one of my gasser V-8's to a trailer grossin 10K plus, pull it better and get close fuel mileage to any I6 I've ever been around.

Grzube
02-08-2007, 12:06 PM
Well Mudstopper, I bought the truck for $6100 cdn, the injection pump was replaced, the body has no rust it's vey,vey clean, i'll make those mods like you suggested, thanks!!