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Diesel Conversions Convert gas to diesel, or convert to a 6.2/6.5/Duramax/Cummins/Navistar/Isuzu/Perkins/Detroit/or ... diesel engine. Go here to see completed projects, works in progress, share your conversion or ask the experts.

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  #11  
Old 08-03-2017, 07:34 AM
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Quote:
Originally Posted by DieselDavy View Post
Kenny,
I'm concerned that the cab didn't come with the donor truck. I thought you'd need the wiring harness and dash. (I really don't know what I'm talking about, just what I think I remember reading here on "the page".)
Dave
I really wish I would've got the cab, I planned on swapping the entire dash, seats, carpet, all kinds of stuff.
That did not happen.

Fortunately, when I bought the engine the guy gave me the entire engine harness, ecu, and tcu.
When I recieved the donor truck (from the same guy) it came with the entire harness for headlights, taillights and everything like that. I will be swapping that to the half ton and wiring it to my lights and such.

There is a Video on you tube and the guy is running an lb7 in a truck about this same year, and he has original gauges hooked up and working correctly.
Not sure what is involved in making this happen yet, but I will difenatly be researching. 12volt electrical is my specialty, not scared at all on (12v) wiring.

Debating on buying or building engine mounts right now.

Going to loosen the cab today and lift it up about 3 inches to get the engine in and mocked up, then cut the cab to fit as I go.
I would like to have a removable tunnel (bolted in) for easy access.

Thanks for the feedback!!

I've posted on 3 forums, this one is the best so far.

I was able to post more pictures!!
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-94 K1500 lb7 swap
-06 Cl55 AMG Mercedes Benz @ 12.3 seconds
-04 E55 AMG Mercedes Benz
-08 f150
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  #12  
Old 08-03-2017, 10:31 AM
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Quote:
Originally Posted by kgoff6 View Post
The donor truck was a 4 door short bed.. And I know that it's an option to swap the cab onto the 3/4 ton frame but that seems like a huge pita.. Cutting the frame and all that.. Then fitting cab mounts..
Honestly, by the time you fabricate all the brackets for the engine and drivetrain and swap everything over, splicing the frame and some cab mounts seems like small potatoes...

Quote:
Originally Posted by DieselDavy View Post
Kenny,
I'm concerned that the cab didn't come with the donor truck. I thought you'd need the wiring harness and dash. (I really don't know what I'm talking about, just what I think I remember reading here on "the page".)
I seemed to recall the same. I know Jim did on the Duramax Diesel Power Project. It seems like if you used the original gauges, they’d have to be using engine sensors instead of going through the ECU.
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’94 GMC 6.5TD K1500 4L80E Yukon SLE 214K
’93 Chevrolet 6.5TD K2500HD NV4500 Std. Cab Longbed 183K
’85 Toyota 22R RN60 4x4 Std. Cab Shortbed 178K (Currently retired for rebuild)
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  #13  
Old 08-03-2017, 09:33 PM
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Quote:
Originally Posted by trbankii View Post
Honestly, by the time you fabricate all the brackets for the engine and drivetrain and swap everything over, splicing the frame and some cab mounts seems like small potatoes...



I seemed to recall the same. I know Jim did on the Duramax Diesel Power Project. It seems like if you used the original gauges, they’d have to be using engine sensors instead of going through the ECU.

I'll have to do some more research!
seems like anything obdii would be easier to work with than my current set up.

We got the engine in today for the second time (rough fit).
I cut out the tunnel and that helped a lot with getting the engine and trans in and out.

We also broke the cab mounts loose and put 4x4 blocks between the mounts to get an extra 4 inches.
I didn't want to do a body lift, but I'm just fighting against myself if I don't.
The engine sits really high, with the engine sitting about where it will mounted (level) I have 7+ inches of space between the transmission and the crossmembers where it will mount.
Not sure what to do here.. Or if it's okay to have that much room in between.
I think the hood will still close.. But we will see.

We're going to weld the bottom engine mounts from the 3/4 ton onto the half ton frame.

I called and searched everywhere I could find with no luck of finding conversion engine mounts.




Pics included
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__________________
-94 K1500 lb7 swap
-06 Cl55 AMG Mercedes Benz @ 12.3 seconds
-04 E55 AMG Mercedes Benz
-08 f150
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  #14  
Old 08-04-2017, 02:59 AM
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Do you have a copy of the book?

http://www.thedieselpage.com/duramaxconversions.htm
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’94 GMC 6.5TD K1500 4L80E Yukon SLE 214K
’93 Chevrolet 6.5TD K2500HD NV4500 Std. Cab Longbed 183K
’85 Toyota 22R RN60 4x4 Std. Cab Shortbed 178K (Currently retired for rebuild)
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  #15  
Old 08-04-2017, 08:21 AM
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Hi
I would try to get the engine/trans lower into the frame.
I am pretty sure the stock trucks with the duramax in them run a 2" body lift.
By the looks of your last pic's you need to get more clearance,which will happen once you get the engine lower into the frame.
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  #16  
Old 08-04-2017, 10:50 AM
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Quote:
Originally Posted by trbankii View Post
Just bought a copy of the book! Thank you for the link
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-94 K1500 lb7 swap
-06 Cl55 AMG Mercedes Benz @ 12.3 seconds
-04 E55 AMG Mercedes Benz
-08 f150
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  #17  
Old 08-05-2017, 10:13 AM
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Quote:
Originally Posted by kgoff6 View Post
I'm getting the donor truck Monday!!

I lucked out and got to deal with good people who want to see this project move along!
Otherwise, I would have had to proceed one paycheck at a time..

Now I have lots of things I need! The transfer case is included, and some of the other things I'm thinking I'll be able to use
-fuel tank
-rear axle
-accel pedal
-entire dash
-intercooler (if it fits)
And much more
Kenny
Kenny, I would trade the 2003 HD rear axle for a GM 9-1/2" semi-floater like the one I used. GM used the 9-1/2" rear axle in these heavy-half ton and light-3/4 ton trucks back in the day, and they are available in 6 lug to fit the half ton wheels. I haven't broken the rear axle in my truck, even with 600+ rear wheel dyno horsepower. The 2003 HD axle is really too heavy for the chassis and the mismatch in wheel lugs would complicate things. You can read more about the rear axle I used here: http://www.thedieselpage.com/reviews/randys.htm

I recommend keeping the original 1995 and newer dash, just modify the cluster mount to accept the 2003 cluster. That will greatly uncomplicated the conversion. Though, you should fit the 2003 steering column, which will give you the correct cable shift mechanism for the Allison and all of the electrical will be plug-n-play. In the 1994 model year vehicles, It's a toss-up whether to change the entire dash... I'd look hard at finding a way to keep your original dash. The dash conversion in my truck was as or even more difficult in some ways than the engine conversion - took nearly as long too. There are ways to do a conversion while keeping your original dash cluster. There's a motorhome conversion discussion here in this forum about just such a thing.

You can read more about my intercooler installation here: http://www.thedieselpageforums.com/t...ad.php?t=28375

Jim

Last edited by More Power; 08-05-2017 at 10:26 AM.
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  #18  
Old 08-17-2017, 07:55 AM
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Quote:
Originally Posted by More Power View Post
Kenny, I would trade the 2003 HD rear axle for a GM 9-1/2" semi-floater like the one I used. GM used the 9-1/2" rear axle in these heavy-half ton and light-3/4 ton trucks back in the day, and they are available in 6 lug to fit the half ton wheels. I haven't broken the rear axle in my truck, even with 600+ rear wheel dyno horsepower. The 2003 HD axle is really too heavy for the chassis and the mismatch in wheel lugs would complicate things. You can read more about the rear axle I used here: http://www.thedieselpage.com/reviews/randys.htm

I recommend keeping the original 1995 and newer dash, just modify the cluster mount to accept the 2003 cluster. That will greatly uncomplicated the conversion. Though, you should fit the 2003 steering column, which will give you the correct cable shift mechanism for the Allison and all of the electrical will be plug-n-play. In the 1994 model year vehicles, It's a toss-up whether to change the entire dash... I'd look hard at finding a way to keep your original dash. The dash conversion in my truck was as or even more difficult in some ways than the engine conversion - took nearly as long too. There are ways to do a conversion while keeping your original dash cluster. There's a motorhome conversion discussion here in this forum about just such a thing.

You can read more about my intercooler installation here: http://www.thedieselpageforums.com/t...ad.php?t=28375

Jim

I got the 3/4 ton rear axle installed yesterday. It needs a bit to make it perfect, but it bolted up fine.
I swapped the springs and everything over and they bolted up to the frame with no issues.
I need to add spacers in the rear on the frame to bring the shackle mounts out an inch+ or so on each side.
The mounts on the 3/4 ton axle are 2 inches wider than the 10 bolt. For right now it's all boolted up tight but once I have a welder available to help out I figure we'll get some type of spacer on the frame.
My driveline angle looks perfect.

This was much easier than I expected.

I pulled the gear box on both trucks next, and they swap right over as far as bolts go. Same size and everything.
What it seems like I will have to do is do a cut and wels so that I can keep the same lower connection on the new gearbox, while keeping the same old design up top.
This way I will have the new gearbox paired to the old steering wheel.

Not sure if I'd want to swap the steering wheel from a 99.

Oh yeah, I found my new dash.
Since mine is a 94, it seems as though fitting diesel gauges from an 03 is not an option.
I have found a complete dash from a 1999 454 suburban, and the best part is, it's from an old friend.
I'm getting the dash, BCM, and seats for about 250-300$

Think that's about all for now
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__________________
-94 K1500 lb7 swap
-06 Cl55 AMG Mercedes Benz @ 12.3 seconds
-04 E55 AMG Mercedes Benz
-08 f150
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  #19  
Old 08-17-2017, 08:00 AM
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Default Duramax conversion

Some more pics
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File Type: jpg 20170815_184244.jpg (97.5 KB, 11 views)
File Type: jpg 20170816_113533.jpg (97.0 KB, 6 views)
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File Type: jpg 20170816_122832.jpg (98.0 KB, 7 views)
File Type: jpg 20170816_170223.jpg (101.2 KB, 7 views)
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-94 K1500 lb7 swap
-06 Cl55 AMG Mercedes Benz @ 12.3 seconds
-04 E55 AMG Mercedes Benz
-08 f150
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  #20  
Old 08-26-2017, 03:10 AM
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Got the trans crossmember loose from the frame and slid it back a couple inches to bolt the allison up to it.
Luckily the k1500 crossmember rests on the inside of the frame rail instead of bolting up from the bottom like the duramax one.
This made it easy for me to get things where I wanted them, got the hoist out of the way finally, and then rolled the truck back with the engine sitting in it so I could clean up my work space real well!

I'm almost on my days off, I plan on knocking out wiring and the fuel system\tank next!
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File Type: jpg 20170825_140701.jpg (96.1 KB, 12 views)
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File Type: jpg 20170825_140531.jpg (93.2 KB, 9 views)
File Type: jpg 20170825_140651.jpg (94.6 KB, 10 views)
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-94 K1500 lb7 swap
-06 Cl55 AMG Mercedes Benz @ 12.3 seconds
-04 E55 AMG Mercedes Benz
-08 f150
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