454 BBC vs. 6.5 turbo diesel in truck?

454 BBC vs. 6.5 turbo diesel in truck?

  • Gas is where it's at baby! (Any big block participants)

    Votes: 3 37.5%
  • Dodge or Ram it with a Cummins!

    Votes: 5 62.5%
  • Stroke it like a Harvester combine!

    Votes: 0 0.0%
  • Detroit (Like a rock) City!

    Votes: 0 0.0%

  • Total voters
    8
  • Poll closed .

Silly Seville

Senior Chief Petty Officer
Joined
Dec 5, 2009
Messages
798
Notice: This is a LONG post...read at your own risk of apathy! :D

I frequent farm auctions during the winter looking for deals on tools and miscellaneous parts. They almost invariably have beater pickup trucks at these sales, so I went prowling for older model Chevy trucks for their ubiquitous 350 and 454 engines to add to my collection for later re-powers. Well, I lifted the hood of a '96 1 ton expecting to see a Vortec 454 lurking in there, and instead I see a turbo eyeballing me from the passenger side! :eek: Well, I walked away discouraged as the rest of the trucks were of the variety I wasn't interested in (too expensive, too big) and sulked at my search in vain.

During lunch, I was "chewin' the cud" with a local about who made a better diesel for pickups (Navistar, Cummins or Detroit) and we concluded that the "combine engines" were the best bang for the buck. (International to you young-uns; also known as cornbinders or simply Harvesters) Anyway, as a Ford lover, I couldn't resist making some rude remarks about the 6.5 in the Chevy and how much it was hated by diesel fans. To which he replied, "You mean like the one out there?" (pointing to the truck I had looked at) I nodded and he then said, "Yeah that's mine, I'm trying to unload it." (Insert red face here on my behalf) :redface: Never insult a mans truck unless you're very good friends! :facepalm: Anyway, he was good natured about it as I composed myself, and we had a chuckle. Turns out, he was a really nice fellow, and we talked for another two hours while my wife sat impatiently in the car waiting for me to quit wasting time.

As it turned out, this guy had owned the truck for 6 years and pulled horses back and forth from KY to NC regularly. On it's last trip it developed a coolant leak from the head, so he had it towed in for diagnosis. Was told it was either a blown head gasket or cracked head. Minimum $600, maximum $2,400 to repair. He dragged it home and it sat for a year before dragging it to the auction.

Now, here is where my question for you fine people comes in. (Thanks for holding your breath this long.) If you were in the market (as I soon will be) for an older 3/4 or 1 ton truck, would you rather have the tried and true 454 powering it and getting an abysmal 10 mpg, or rather the notoriously infamous 6.5 turbo diesel at a remarkable 20 mpg? Is the trade off in expensive diesel engine upkeep worth the price in fuel savings over the useful life of the truck?

Now, for the rest of you (Ford & Dodge guys) would you say chuck both engines into the nearest recycling yard and get a vehicle powered by the 5.9 Cummins or 7.3 Powerstroke and call it done? Here is why I am asking this long-winded question. The guy offered the truck to me for what it is worth in scrap iron! (minus the six Alcoa aluminum wheels) He said if he can't sell it the way it is, it's going to the smasher. Now, understand; I have been a Ford guy for 20 years and have said to many people I would never own another GM product (after having a Fiero in the 80's) :rolleyes: so I am cautious to try again, but this seems like such a great deal! Is it worth repairing this unknown 6.5 turbo diesel to get an otherwise nice, rust free, heavy duty truck in the bargain, or should I keep looking elsewhere? Perhaps I should buy the truck and ditch the diesel for an easy 454 swap?

I sincerely don't want this thread to become a playground for Ford-Chevy-Dodge beat-downs...I would like to hear some real world experiences from those who have done the diesel dance and lived to tell about it. I have seen the prices on injectors, pumps, metering devices, turbo etc. and know there is a price to pay to be in the "oil burners club." I must say though, I would enjoy feeling like I'm actually pulling my boat up hill, instead of it pulling me back down the hill I'm trying to climb. My old 351 Windsor is so tired. She needs to be put out to pasture soon. :(

Regards
 

smokeonthewater

Fleet Admiral
Joined
Dec 3, 2009
Messages
9,838
Re: 454 BBC vs. 6.5 turbo diesel in truck?

I have a 7.3 powerstroke and two 6.2 chevy's I have 3 friends with 6.5 suburbans... they all love em and one of my friends trailers his 28' cruiser daily with his 6.5 burb

much of the hate for 6.x chevy diesels is misplaced..... gm really screwed up with the earlier 5.7 diesel which was based on a gas engine olds I believe and was a dismal failure... many people thing that the 6.2/6.5 was that engine and parrot regularly that they are "junk" without one bit of actual experience with them....

for scrap price?! I'd be droppin my ham sammich!
 

R Socey

Chief Petty Officer
Joined
Jan 9, 2011
Messages
501
Re: 454 BBC vs. 6.5 turbo diesel in truck?

If I were going to buy a new truck, I would go with the cummings. However, I am a Ford man. My 3/4 ton HD 1987 xlt Lariat 4x4 460 zf5
sterling 411 has served me very well - close to 500,00 miles ( 3 motors ) In fact I am currently having a 525 Probe Racing forged fuel injected 10.3 to 1 Edlebrock aluminum heads headers 3" exhuast crossover ram air etc. built at this time - it will pull everything you listed
together! Not too good on gas!
 

TilliamWe

Banned
Joined
Dec 21, 2004
Messages
6,579
Re: 454 BBC vs. 6.5 turbo diesel in truck?

Ok, I have never owned a 6.5 Turbo diesel. But my dad did own a 1997 3/4 ton Suburban with a Vortec 7.4. It was a monster at pulling! Pulled his Sea ray 268 cruiser all over Florida and to southern Indiana. It later pulled his Chaparral Signature 300 cruiser. It pulled them great! (Didn't stop them great, cause those GM truck's brakes are not strong). It got SIX, yes 6 mpg, when towing, even on the "flat" ground in Florida. Never got above 11 even on flat highway.

The 6.5 turbo diesel doesn't have as much power as a Vortec 7.4. So it won't pull as well. Plus it's more expensive to maintain.

If you want a diesel, get a 7.3 or a 5.9. Or go newer and get a Duramax. The 6.5 was never intended to compete with the 7.3s and the 5.9s as far as a workhorse of an engine. it was intended to provide some economy. Which it can.

Oh and you stated this:

"Is it worth repairing this unknown 6.5 turbo diesel to get an otherwise nice, rust free, heavy duty truck in the bargain, or should I keep looking elsewhere? Perhaps I should buy the truck and ditch the diesel for an easy 454 swap?
"

The answers are 1.) No
2.) Yes
3.) A swap from a diesel to a gas 454 would not be easy.
 

Tail_Gunner

Admiral
Joined
Jan 13, 2006
Messages
6,237
Re: 454 BBC vs. 6.5 turbo diesel in truck?

If your dabbling in older trucks the big block is the safe way to go. Old deisels are extremely expensive to repair and the likely hood of finding a good one at auction is...well not good. With that said prior to dodge hangine everthing but the kitchen sink on there deisel for a older truck that be my 1st choice seconded by a 7.3

And of course never by a v-10 dodge..moving grenade...While that is stickly a opinion i see more used (HEAVY'S) a month than i have a right to...and during the inspection process it is rare to get a keeper..lots of big hidden issues.

Try to find a v-10 ford you have both of best world's solid power train and a suspension to match.
 

RogersJetboat454

Commander
Joined
Jul 9, 2010
Messages
2,964
Re: 454 BBC vs. 6.5 turbo diesel in truck?

I have seen no major issues with the 6.5. I usta work at an independent repair shop that had a contract with an ambulance company in town. Allot of the GM's were 6.5's, and we didn't see any major issues with them even with over 150K of HARD (beaten daily by 20 somethin yr old EMT's who had no idea of the proper way of shutting down a hot diesel) use. We also had a gentleman that would come in with a 6.5 powered 3/4 ton Suburban. Last I remember he had over 230K on it, and was regularly driving it on long family trips down to FL.

Some power numbers for the '96 PU's according to Mitchell On Demand;

The 6.5L equipped vehicle with 8th VIN character "S"
180 HP @ 3400 RPM
360 Ft-Lbs @ 1700 RPM

6.5L equipped vehicle with the 8th VIN character "F"
190 HP @ 3400 RPM
385 Ft-Lbs @ 1700 RPM

7.4L equipped vehicle with the 8th VIN character "J" (central fuel injection)
290 HP @ 4000 RPM
410 Ft-Lbs @ 3200 RPM

7.4L equipped vehicle with the 8th VIN character "N" (TBI)
230 HP @ 3600 RPM
385 Ft-Lbs @ 1600 RPM

Obviously the BBC compared to this engine is the leader with higher over all HP and torque, but the 6.5L makes some respectable torque down low, and with out a doubt gets better fuel economy.
 

Scott Danforth

Grumpy Vintage Moderator still playing with boats
Staff member
Joined
Jul 23, 2011
Messages
50,718
Re: 454 BBC vs. 6.5 turbo diesel in truck?

The Cummins diesel is the only Heavy Duty diesel engine available in a truck. the others are light duty automotive engines.

However both the 6.2 and 6.5 TD were good engines with proper maintenance and a new fuel pump thrown in here and there. Ford had its issues with the Navistar from breaking rocker arms to regenerative exhaust going up in flames. Hence the reason Ford dropped Navistar.

ALL OF THEM SUFFER FROM WEAK TRANSMISSIONS, EVEN THE ALLISON 1000 SERIES!!!!!!! Especially when someone adds power.

Diesel over gas every day of the week for towing capability and fuel economy.
 

Limited-Time

Vice Admiral
Joined
Mar 30, 2005
Messages
5,820
Re: 454 BBC vs. 6.5 turbo diesel in truck?

Unless your doing a lot of heavy towing go with the gas option. Diesel standard maintenance cost in oil changes, and fuel filters quickly negate the non towing MPG advantage. Especially with the cost of diesel fuel today.
 

foodfisher

Captain
Joined
Feb 18, 2009
Messages
3,756
Re: 454 BBC vs. 6.5 turbo diesel in truck?

I'm frequently badgered by diesel owners about my hemi and it's attraction to gas stations, but out the other side of their mouths comes constant complaining about the cost of diesel fuel and the cost of maintenance. Hey, it's got plenty of poop for my needs, and only oil changes and tire rotation to worry about.:confused:
 

dolluper

Captain
Joined
Jul 19, 2004
Messages
3,904
Re: 454 BBC vs. 6.5 turbo diesel in truck?

Well depending on the mileage of that 6.5....if its low could be worth it but ifin its high mileage run away....seen a few in my old shop with cracked heads,main bearings,and crank failures....but then again they were high milers 500k++.....there was also a problem with the injection pump drivers...they could fail if to much heat....or if reinstalled wrong or no heat paste used
 

Silly Seville

Senior Chief Petty Officer
Joined
Dec 5, 2009
Messages
798
Re: 454 BBC vs. 6.5 turbo diesel in truck?

Thanks everyone for your input thus far...keep the poll responses/advice coming. I called the fellow yesterday to see if I could get any more pertinent info, and he is yanking the heads this week to have them checked for cracks. I guess he wants to see if he can get it running and sell it for a higher price after all. The odometer and Carfax say 160k miles, so I question why such a low mileage engine blew a gasket or cracked a head? :confused:

He's asking $2,000 for it as is with the Alcoa's, or $1,000 if I provide my own wheels to roll it/tow it away. Said he put a rebuilt injector pump on it just before the engine steamed out, and supposedly has a newer Banks turbo on it, but has zero paperwork/receipts to prove it. The only body damage is the clearcoat/paint is virtually gone from the hood, hail damage to the roof, and cracks in the fiberglass dually fenders, but no rust anywhere!

Worst case scenario is a rebuilt long block (minus fuel/air system) is $5k. Should I go get this truck before he invests any more time or $ in it and ups the price, or should I wait for him to tell me what is actually wrong with it and save myself the hassle?

I'm going to look at a '95 F-350 460 low mileage gasser, AND a '98 F350 7.3 PSD this evening. Gasser owner claims 10-12 mpg towing or not, diesel guy claims 18 hwy empty, 14 towing 10k lbs. Gasser has ONLY 140,000 miles, diesel has 400,000! Both asking same price. I don't want to make an offer on either (sellers are both very motivated because of fuel prices) until I hear back from the Chevy guy. Am I making a mistake waiting on the Chevy? Should I go after the Fords? And for you Dodge guys, don't think I have forgotten their offerings. I have owned and enjoyed a Caravan, Jeep Cherokee, and a Dakota 4x4, (all 90's models) and they were all great runners. I just haven't been able to find an early model Ram (94-97) with the Cummins and extended cab/4 door in my price range. I've seen a few standard cab diesels, but I really need the extra seating capacity in a pinch; and it seems most of the Rams advertised around here only come with the 360 or V-10 in ext. cab versions.

Keep the opinions coming and I will keep you posted on my search results. (The marina rules are too strict, so I'm towing again this year.) :mad:
 

tomdinwv

Senior Chief Petty Officer
Joined
Jun 22, 2008
Messages
665
Re: 454 BBC vs. 6.5 turbo diesel in truck?

I was a mechanic for a transit authority and we ran the 7.3's in our Ford cutaway buses. I loved those engines. We kept 14 or 15 in service at all times. We rarely had a problem with the 7.3 engines. In the 7 years I was there I remember we had to change maybe 2 injectors. Only recurring problem we had was with the transmissions. We all got pretty good at changing transmissions and I helped rebuild a bunch of them. Of course some of that could have been avoided but no matter how hard we tried we could not convince the drivers they needed to run with the overdrive off. The forward planatery gears would explode. Worst thing Ford ever did was switch to the 6.0 diesel. I'm sure some guys on here have had good luck with the 6.0 but in my experience, don't go near one.

The Ford 460 is a beast. I had one several years ago in an F250. It would pass anything but a gas station. LOL. Plenty of torque and HP.

I currently have a 2008 Dodge Ram 1500. I bought it new and if I knew then what I know now I would have went with the Ram 2500 with the Cummins.

Good luck with your decision. Take your time and find a truck you like with the powertrain that suits you.
 

dolluper

Captain
Joined
Jul 19, 2004
Messages
3,904
Re: 454 BBC vs. 6.5 turbo diesel in truck?

He replaced the injector pump....by himself probably....then it heated up ...I'm not shocked to hear that...if you misaline the drivers {they attach to the pump} or don't use the heat paste as I stated before....you will have alot of heat problems...Ask the guy if he did the work....I'm guessing he did as he's pulling the heads now....160K miles isn't to bad if it WAS MAINTAINED PROPERLY
 

Silly Seville

Senior Chief Petty Officer
Joined
Dec 5, 2009
Messages
798
Re: 454 BBC vs. 6.5 turbo diesel in truck?

We rarely had a problem with the 7.3 engines...I remember we had to change maybe 2 injectors.

This is why I both love :) and hate :mad: the idea of owning a 7.3 PSD. I want that legendary power and reliability, but I am frankly scared of the diesel related part prices. I did the math, and based on just using the truck for towing the boat for one season, I would save @ $700 in gas using a diesel over the 460. However, if I blow a turbo, that wipes out the savings, and requires another $300! :eek: If I wipe out 2 injectors, that washes the savings. If I burn up a PMD, again the fuel savings are zero.

Now sure, if I can drive the diesel successfully EVERY season without anything more than oil changes...the savings would add up quickly...especially if I also used the diesel as a grocery getter. But major component failure will cancel two or more years worth of any realized fuel savings in an instant. So I am really at an impasse. :(

Only recurring problem we had was with the transmissions.

So does this mean that I can also expect to replace the E4OD tranny every few years? I've read a few threads about how no automotive transmission is happy with a diesel in front of it. I've never seen a Ford F350 without an automatic! I know the manuals exist, but everyone apparently orders the auto in the diesel trucks. Weird!

The Ford 460 is a beast. I had one several years ago in an F250. It would pass anything but a gas station. LOL. Plenty of torque and HP.

Yes, I noticed in the HP/TQ specs that both engines are near identical in performance; so the rate of fuel burn and maintenance/repair become the only real arguing points between the 460 and 7.3 PSD. :confused:
 

tomdinwv

Senior Chief Petty Officer
Joined
Jun 22, 2008
Messages
665
Re: 454 BBC vs. 6.5 turbo diesel in truck?

Hey Seville,

I also look around on some other forums about RVs. Many of the folks on there have the 7.3/E40D combos and have not had any problems. Many of them are towing RVs that weigh anywhere from 7,000 to 12,000lbs. They disengage their OD while towing. Like I said in my earlier post, we could not get our drivers to do this. Our cutaways were heavy to begin with and then you add 15 to 20 meaty passengers and well, it's a lot of weight. LOL. I personally think, no matter if you choose gas or diesel, it you stay up on the maintenance, and pay attention to your vehicle, you can get many years of service out of either. Many of the folks towing heavy RVs with diesels also add boost gauges, trans temp, and exhaust gas temp gauges to further monitor their engines. I think dumb luck comes into play sometimes too. Like I said earlier, we had about 14 Ford with the same engine/trans combos, and some of them left our service with the original transmissions and some went through several in their service life. Similar miles and driving conditions, some of them broke and some of them did not.
 

Rockmere1

Seaman
Joined
Feb 27, 2011
Messages
68
Re: 454 BBC vs. 6.5 turbo diesel in truck?

Cummings hands down, diesel superiority, used in pick ups, fire engines, trains...

Ford 7.3, My uncle has one 200,000 miles only needed two idler pulleys in its life, would drive it across the USA tonight with an heavy trailer, but watch out for the trannys though getting with that high of mileage.

I dont know much about the 6.5 Chevrolet, but if by any way you could get your hands on a 6.6 Duramax with the Allison tranny combo, i have an 2004, best running pick-up ive seen/drove. it will run circles around "Blue"(my uncles 7.3) but only has 140,000 have to see how it does the next 60,000
 

smokeonthewater

Fleet Admiral
Joined
Dec 3, 2009
Messages
9,838
Re: 454 BBC vs. 6.5 turbo diesel in truck?

SS, as I told you in pm, you are NOT towing a load that needs a diesel or a bigblock.... a 3/4 ton chebby with a vortech 5.7 would hardly notice 7000 lbs behind it and would get decent mpg's.... You can just forget the idea of saving money by buying a diesel..... For an example go price out 15 quarts of rotella and a filter for my powestroke vs 5 qts and cheaper filter for a gasser. Everything on my truck is more expensive than my old chevy.... My last maintenance on it was 2 front wheel bearings, 4 wagner rotors, front and rear wagner pads, a set of wagner parking brake shoes, and front caliper slide pins. I get a great price at my local parts house.... the total wasn't far from $1000. Would have been about half that for my old chebby....

Ball joints, tie rod ends, heck even antifreeze costs more as it holds 5 gallons of coolant and requires an additive from ford.

I could have bought a couple of ole chebby's with what I've spent to maintain my dually but I NEED the big truck. I tow at a gross of OVER 26,000 lbs........

My advice is: If you are economy minded, drag your feet and stick with a gas smallblock for as long as you possibly can.
 

lexer440

Petty Officer 1st Class
Joined
Aug 30, 2010
Messages
222
Re: 454 BBC vs. 6.5 turbo diesel in truck?

The commercial world is diesel, theres a reason for that. Powerful, dependable, economical and easy to maintain. I am not a fan of turbos as they can be expensive if they blow but I have a friend with the 6.5TD, he's a professional driver and he loves it. On the cost of repairs, my ram has the 5.7 hemi and cost me $2800 not long ago. Gas or diesel, when it fails it fails and it costs to fix it, that is reality.
 
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