M1028 6.2 diesel to 454 swap

[cucvdonk]

how much did it cost ya doing this swap? I m considering it myself because of all the problems having with this 6.2.

 

[POOR WHITE BOY]

I bought the motor complete from a totaled truck 1994 model with 70k miles. $600.00. It was fuel injected motor so i changed it to a carb - bought intake,distributer,carb and i had to put electric fuel pump on it because 1994 454 engines did not have a fuel pump boss on the block. It had a sepentine belt kit on it but it was cheaper for me to buy a complete kit thru gm versus replacing/service items , belt,water pump , alt , 2 idler pulleys , tensioner, etc. I will post new photos very soon . I have less than $1,500.00 in it total - needs to go to the exhaust shop for connection at the engine - that should cost about $100 - as i already got an estimate. I would have already had it running but i had surgery and have not been able to work on it in 2.5 weeks. Stay tuned it will be complete soon

 

[Lebowski]

PWB, what tires are you going to run with that 454 and 4.56 gears?
Have you seen this $129 Serpentine kit?
Big block Chevy serpentine conversion kit
Any big advantage to going serpentine?

 

[POOR WHITE BOY]

I am going to leave the stock tire size on it for now . This truck will sit more than it gets used. That serpentine kit is just brackets to make a small block kit fit the big block. Small blocks are easy to find in the salvage yard with a serpentine kit on them. My motor had a kit already on it but for $540.00 it made sense to me to replace all and have new.

 

[83k30]

did the 454 bolt to the th400 bellhousing?

 

[jeli]

Small block, big block and 6.2 all have the same mounting. Any chev style auto or manual bell housing will fit. With 4.56's you can run any tire. I ran 33's with 3.08 gears with my 454 4 spd. 37" humvee tires might get into double digit gas mileage!!! I got 9 in town and 11 on the highway.

 

[POOR WHITE BOY]

Will post some updated photos soon - camera is broke

 

[Squid in a CUCV]

What ever happened to this? Status?


Yes, I have no problems reviving old threads. LOL

 

[Recovry4x4]

PWB hasn't logged on since 2010. It's unlikely we'll be getting an update! I did see his puller going down the road on a trailer about 6 months ago so he's still around.

 

[Squid in a CUCV]

Well doesn't that just suck! Guess, I will have to do a detail conversion on my build/swap. Lol

 

[Davetheplumber]

I'm making great progress on my 6.2 to 454 swap in my M998

I will be firing it up by this weekend.


out with the old

In with the new

www.nwhmmwv.com

 

[Recovry4x4]

I may have to commence my own 454 swap. The mountains here all but kill off a 6.2, especially in an 8500# CUCV.

 

[cucvrus]

5.3 or 6.0 may be more modern wiser update. IMHO. Fuel injection improved power to weigh ratio. I just sold a 2013 Chevrolet wrecked cutaway with the entire driveline and it had a 6.0 in it with 17k on it. I was thinking about using the engine / transmission in an older truck but just passed it up and bought a new truck instead. Less hassle.

 

[Recovry4x4]

5.3 or 6.0 may be more modern wiser update. IMHO. Fuel injection improved power to weigh ratio. I just sold a 2013 Chevrolet wrecked cutaway with the entire driveline and it had a 6.0 in it with 17k on it. I was thinking about using the engine / transmission in an older truck but just passed it up and bought a new truck instead. Less hassle.

I agree, on paper this makes more sense. In my fixed income world, the cost of the swap is only complicated by the need for a scan tool and complexity beyond my skills. A mild 454 for the little driving I do coupled with the simplicity of throttle body injection gets me where I need for a fraction of the cost. A new truck would also be ideal but not in the cards anymore. Heck, a turbo may suffice. We'll see what the future holds.

 

[Davetheplumber]

IT's all about the $$$. My swap will be under $2k complete. Also, there is NO fabrication of mounts or conversions plates or adjusting the lift yada yada yada. Plus, I always love an old 454


www.nwhmmwv.com

 

[rustystud]

I love my 383 Hi-Torque ( good fuel mileage) but it would be nice when towing the RV over the mountains to have more power. Also I have a carb, and fuel injection would be nice. For all the guys out there who worry about converting there CUCV just remember it still is just a basic Chevy truck with a few special modifications (like the 24 volt system) . So any Chevy engine will fit and work fine. The reason I bought mine in the first place was I could not afford a 1 ton dually truck for the prices they where selling for out here. The CUCV cost me $5,000.00 in a sealed bid from "GSA" and only had 24,000 original miles on it. I then spent the next 5 years converting it to a "civilian" truck. It has been a good dependable truck and I plan on giving it to my son when I am too old to drive it anymore ! He can then retrofit it with a "Fusion Drive" !

 

[Davetheplumber]

HOLY S&*T!!!

Just got back from the first good drive. AND WOW. Thats some real POWER. I can't believe the difference in torque. You could easy bust a differential or something. If I was 20 years old again I would need a second set of tires within the week.

I had to make a few mods to the throttle cable and wiring. Not to bad. Looks like I will get to work on the lighting system tomorrow PM and hopefully have everything done by Friday for a drive to work.

65-70MPH no problem. Cruising speed is 60 easy. Way cool.

I don't know my milage yet but my gut tells me I am down to about 8-9mpg.

If your looking for TONS more power and a good speed for cheep. This is the way to go.

TOTAL BRAKE DOWN OF $$$$ ON THIS BUILD IS AS FOLLOWS....
$0.00 Free motor home with the rebuilt Chevy 454. Drove it home.
$73.33 tune up stuff. Plugs, belts, wires and oil.
$22.44 Cap kit for vacuums ports and 3/8" brass plugs for some emissions ports on the exhaust.
$15.29 Power steering fluid.
$88.99 New alternator.
$0.00 Free low profile air cleaner off of on old boat motor I had.
$8.45 Random sized bolts to mount the power steering pump from the military engine so it would match up the power assist braking lines.
$22.00 new high pressure line for the power steering pump to the the brake system as it was 6" to short.
$34.99 2 flexible exhaust pipes and clamps to go from my new manifolds to the exciting exhaust system
$400.00 Disposal of the old motor home

FOR A GREAT TOTAL OF $665.00!

-$500 I am selling the old 6.2 for
-$250 I am selling the generator out of the motor home

So far this build has MADE ME $85.00!!! not counting my labor of course.

I would suggest this swap to anyone who isn't stuck on the diesel idea. Also anyone who doesn't want to spend $10K or more to have a great running powerful HMMWV.

MOOSE

www.nwhmmwv.com

 

[rustystud]

HOLY S&*T!!!

Just got back from the first good drive. AND WOW. Thats some real POWER. I can't believe the difference in torque. You could easy bust a differential or something. If I was 20 years old again I would need a second set of tires within the week.

I had to make a few mods to the throttle cable and wiring. Not to bad. Looks like I will get to work on the lighting system tomorrow PM and hopefully have everything done by Friday for a drive to work.

65-70MPH no problem. Cruising speed is 60 easy. Way cool.

I don't know my milage yet but my gut tells me I am down to about 8-9mpg.

If your looking for TONS more power and a good speed for cheep. This is the way to go.

TOTAL BRAKE DOWN OF $$$$ ON THIS BUILD IS AS FOLLOWS....
$0.00 Free motor home with the rebuilt Chevy 454. Drove it home.
$73.33 tune up stuff. Plugs, belts, wires and oil.
$22.44 Cap kit for vacuums ports and 3/8" brass plugs for some emissions ports on the exhaust.
$15.29 Power steering fluid.
$88.99 New alternator.
$0.00 Free low profile air cleaner off of on old boat motor I had.
$8.45 Random sized bolts to mount the power steering pump from the military engine so it would match up the power assist braking lines.
$22.00 new high pressure line for the power steering pump to the the brake system as it was 6" to short.
$34.99 2 flexible exhaust pipes and clamps to go from my new manifolds to the exciting exhaust system
$400.00 Disposal of the old motor home

FOR A GREAT TOTAL OF $665.00!

-$500 I am selling the old 6.2 for
-$250 I am selling the generator out of the motor home

So far this build has MADE ME $85.00!!! not counting my labor of course.

I would suggest this swap to anyone who isn't stuck on the diesel idea. Also anyone who doesn't want to spend $10K or more to have a great running powerful HMMWV.

MOOSE

www.nwhmmwv.com

My best friend got a 1985 Chevy crewcab 1 ton back in 1990. It has a 454 also. That truck has been a real work-horse all these years and extremely fast ! The only draw-back is the 8 mpg . Fully loaded or empty, 8 mpg !

 

[Davetheplumber]

I know, 454 is not a gas saver for sure. I really think its worth the fuel cost. That would be the biggest draw back I suppose. But gosh, this thing is a beast. Mean and feisty. Also, all repairs a so much cheeper than any diesel stuff.

The 454 puts out a lot more power than I thought. If I did it again, I might, might choose a built 350 or 383 stroker. It might fit easer and big blocks do have their issues. Anyhow, I'm loving every min of this for now.

Moose

www.nwhmmwv.com

 

[Tinstar]

When fuel skyrockets again (oh it will) that mileage is gonna hurt!!
Luckily if I need tons of power I just drive my 06 LBZ Duramax.

I do miss the sound a 454 makes.