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2000 GMC W4500

Bye crappy bed. Should be worth something in scrap.
 
Grendel said:
Bye crappy bed. Should be worth something in scrap.
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Well see. Lots of cracked stuff, aluminum body's need to be fabricated different. They can't handle the fatigue from flexing like steel. When I would build aluminum racks and body's I used alot of bolted connections and big brackets with plug welds.
 
New turbo on the way. I hope that the hardware doesn't give me too much trouble, but it's likely everything is either going to round off or snap.

Cut the back off the chassis. I think I want to build the body to pin on entirely. This way I can switch around the crane front or back depending on how i back under it. I figure 4 outriggers set, pull pins and drive out.
 
Dethmachinefab said:
Cut the back off the chassis. I think I want to build the body to pin on entirely. This way I can switch around the crane front or back depending on how i back under it. I figure 4 outriggers set, pull pins and drive out.
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It's going to be a flatbed, right? What if you put the ICC bar, taillights, hitch, etc on the back of the frame, then mount the crane and a pony motor to the flatbed and put the outriggers at the front and just past the COG (or put lighter ones in the very back that will just hold the body)?
Then setup the brackets to be the same front and back so you can put the whole bed and crane assembly on with the crane in the front or in the back.

Aaron Z
 
aczlan said:
It's going to be a flatbed, right? What if you put the ICC bar, taillights, hitch, etc on the back of the frame, then mount the crane and a pony motor to the flatbed and put the outriggers at the front and just past the COG (or put lighter ones in the very back that will just hold the body)?
Then setup the brackets to be the same front and back so you can put the whole bed and crane assembly on with the crane in the front or in the back.

Aaron Z
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I think we're talking about the same thing?
 
[486] said:
came with a baby gt25
means it needs a dodge takeoff hx35-ish size one :flipoff2:
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I thought about all that stuff, but I really don't want to decend down the path of a snowballing project. I'm like, well all the bolts are going to break so I should just make a header and run a better turbo.

I just need to get it fixed up and working for minimal time and money. Turbo should be here Thursday.
 
Dethmachinefab said:
I thought about all that stuff, but I really don't want to decend down the path of a snowballing project. I'm like, well all the bolts are going to break so I should just make a header and run a better turbo.

I just need to get it fixed up and working for minimal time and money. Turbo should be here Thursday.
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headers really suck, cast iron manifolds are the only way to go whenever possible
just crank the wastegate up half a PSI to make up the flow difference and reap the benefits of it not cracking in half every few months

ETA: the tubes heat up and cool off a million times faster than the flanges, it is the same on manifolds but they're... meatier so the temperature swings are much more gradual and even
so... fabricated log manifolds are kinda the worst of all and longer tube headers can be made to last okay if you make them so the tubes will noodle about rather than binding up as they expand and contract...

I'll shut up now :flipoff2:
 
Dethmachinefab said:
I thought about all that stuff, but I really don't want to decend down the path of a snowballing project. I'm like, well all the bolts are going to break so I should just make a header and run a better turbo.

I just need to get it fixed up and working for minimal time and money. Turbo should be here Thursday.
Click to expand...
I like the idea of a bigger turbo and turned up pump... but that would require a different manifold than we ordered :flipoff2:

For those watching, I didn't know about the turbo, so I am covering it. We also ordered a new manifold, in case the bolts fight coming off.
 
Grendel said:
I like the idea of a bigger turbo and turned up pump... but that would require a different manifold than we ordered :flipoff2:

For those watching, I didn't know about the turbo, so I am covering it. We also ordered a new manifold, in case the bolts fight coming off.
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Yes, absolutely stand up guy that Grendel is. 👍 I didn't even mention it, and he texted me he would cover it when he saw the post. A 22 year old truck backed with a solid guarantee.
 
Made some new ss fuel tank straps in the meantime. Have a guy wire wheeling the frame to get ready for some rust inhibitor paint.
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Broke some bolts loose on the manifold, and they seemed to come out of the head ok. Ones broken but I'll get it out. Turbo to manifold and turbo to the downpipe thing are all going to snap off. Parts should be here Friday. Not sure if I'll get on it right away as I just had a pile of jobs come in.
 
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Yay!

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New cab corner. I've got to figure out how that little plastic panel above it pops out without breaking it. I think there is a bolt behind it that holds the cab corner. The other fasteners are behind the blinker light.
 
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It's was warm and nice enough this afternoon to shoots some paint at it. Came out ok, had a guy wire wheeling it for a few days but he missed a few spots I found when i was painting it. I think it's good enough though. I felt like an equipment reseller painting everything. :laughing:
 
Dethmachinefab said:
20221020_160051.jpg


It's was warm and nice enough this afternoon to shoots some paint at it. Came out ok, had a guy wire wheeling it for a few days but he missed a few spots I found when i was painting it. I think it's good enough though. I felt like an equipment reseller painting everything. :laughing:
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Is that some sort of load sensor/proportioning valve, on the front of the axle housing, to the left of the drive shaft?
 
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Have not had time to work on this but i did order parts. Got some outriggers and hydraulic stuff for the crane body. Hydraulic trailer Jack's were the right size and super cheap. The welds on the hardlines are shitty so I'm expecting at least one to leak. Got a pump and stuff to adapt to the engine, 6 spool valve with pb, load checks and a tank.
 
Had time today to get into the turbo repair. As expected most hardware snapped.

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She was fuckered pretty good.
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Got everything including the manifold off. Removed a broken stud, and left the rear most one as it wasn't wanting to come out.
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Pile of rusty junk we don't need anymore.
 
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Drilled and tapped where the egr bolts snapped off. Block off plate goes here.

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Block off here as well.
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All done. I painted the new manifold with grill paint, but it sweated and rusted up anyways. Missing a few bolts I didn't have on the exhaust elbow and pipe, I'll order these soon.
 
Sold the old isuzu today, so I really need to make time for this build because I need it. Debating on if I'm still going to do the switch around flatbed body or just mounting it. If it's just mounted regular, I can tuck the power pack underneath. I really want a rear mount crane though and that kills alot of potential truck uses.
 
Dethmachinefab said:
Sold the old isuzu today, so I really need to make time for this build because I need it. Debating on if I'm still going to do the switch around flatbed body or just mounting it. If it's just mounted regular, I can tuck the power pack underneath. I really want a rear mount crane though and that kills alot of potential truck uses.
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Do the pin-on style. It'll be rad, and allow for more potential if you want to make another bed module to swap back and forth. Side/rear dump bed? Camper?

Mainly though it will allow you to reposition the crane. I can't think of any other good methods to accomplish that goal...
 
Yotota said:
Do the pin-on style. It'll be rad, and allow for more potential if you want to make another bed module to swap back and forth. Side/rear dump bed? Camper?

Mainly though it will allow you to reposition the crane. I can't think of any other good methods to accomplish that goal...
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Yea certainly would be cool, but does come with some challenges. Will lose any sort of headboard, and a bit of bed space for the power pack along with all the complex mounting requirements. I want to keep the bed slammed as low as possible. I think I'm going to go about this different and build it from almost all formed parts, not the traditional channel method.

Sketched some ideas, sort of a half ass exploded view.
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Main deck is 3 large bent panels, with stiffening ribs. One end capped with a box tube and outrigger mounts, the other with a crane mount structure. Crane mount will be formed 1/2" plate or a heavy channel with supports between two box tubes, outrigger mounts at the ends. I'm sure it will change a ton by the time it's actually being fabricated. This design is 5" deep, 8' wide by 12' 6" long.
 
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