Project Humpty '74 J20 Diesel Build UPDATED!

[jaber]

Hello all. New around these parts but just wanted to say nice truck! Awesome build! I'm getting ready to convert my '89 Blazer from the 5.7 to the 6.2 diesel myself

Welcome from up the hill. You should put that Diesel into a Jeep!

Zack, That is looking awesome. I have a '77 J-20 that I want to do the same with so I have a good strong work truck. Thanks for the pics, they worked first time for me.

[red mistress]

Nice project

Subscribed...

recognize that dual battery tray for a CJ.

Vintage Air A/C ?



LMK if I can help.

[zmjeeps]

Subscribed...

recognize that dual battery tray for a CJ.

Vintage Air A/C ?

Yes, Vintage Air/Hot Rod Air. I put it over in the pass area instead of in the middle. Fits behind the dash nicely and doesn't hang down as far as a stock AC unit. Part of the battery tray for a CJ. Had to modify the inner fender for the third mount.

Z.

[babywag]

Nice!!

Wanna sell me a set of the custom motor mounts so I can ship them to my dad for his 4BT swap?

[zmjeeps]

Nice!!

Wanna sell me a set of the custom motor mounts so I can ship them to my dad for his 4BT swap?

It depends which type of mounts you want to use. I used the hydro mounts and am taking a bunch of flack from some of the diesel guys that they can't be mounted past 4 degrees or they don't work. I don't get it, the forces work out, but whatever. I can make you a pair of plates like the ones I started with to bolt to the motor. Its a great starting point for making your own...

Zack

[babywag]

It depends which type of mounts you want to use. I used the hydro mounts and am taking a bunch of flack from some of the diesel guys that they can't be mounted past 4 degrees or they don't work. I don't get it, the forces work out, but whatever. I can make you a pair of plates like the ones I started with to bolt to the motor. Its a great starting point for making your own...

Zack

I'll email you about it...

[joe]

Great project Zack!

[Mikel]

It depends which type of mounts you want to use. I used the hydro mounts and am taking a bunch of flack from some of the diesel guys that they can't be mounted past 4 degrees or they don't work. I don't get it, the forces work out, but whatever. I can make you a pair of plates like the ones I started with to bolt to the motor. Its a great starting point for making your own...

Zack

The Lord isolators are not designed for a side load. Let us know how it works

[zmjeeps]

The Lord isolators are not designed for a side load. Let us know how it works

Which is what I keep hearing. But no one can explain WHY. Do a force diagram and see how they are are loaded, direct pressure along the axis of the mount. Someone tells me WHY it won't work, I'll redo it.

Z.

[The PIG Smith]

80's browless cab

Best part of the whole project! HAHAHAHA

[zmjeeps]

Best part of the whole project! HAHAHAHA

I wondered how long it would take you to chime in on that...

Z.

[Mikel]

Which is what I keep hearing. But no one can explain WHY. Do a force diagram and see how they are are loaded, direct pressure along the axis of the mount. Someone tells me WHY it won't work, I'll redo it.

Z.

Zach,
You are right - In theory. The problem is that those things compress quite a bit under load, so unless you have factored that compression in your engine mount geometry, the mounts are going to flex in non-axial ways. The angling also causes higher loading of the mounts, affecting the damping rates. I'm not saying they are going to fail, just that you are sailing uncharted waters. Good luck with your awesome build
Mikel

http://www.lord.com/Home/ProductsServices/VibrationShockMotionControlProducts/FluidlasticMountsDampersAerospace/tabid/3523/Default.aspx

[zmjeeps]

Zach,
You are right - In theory. The problem is that those things compress quite a bit under load, so unless you have factored that compression in your engine mount geometry, the mounts are going to flex in non-axial ways. The angling also causes higher loading of the mounts, affecting the damping rates. I'm not saying they are going to fail, just that you are sailing uncharted waters. Good luck with your awesome build
Mikel

http://www.lord.com/Home/ProductsSer...3/Default.aspx

Thank you. While I could not predict how much it would compress under load, I did slot the holes in the engine mounts to allow the stud to settle where it wanted and I haven't bolted it down yet, so as not to trap it before it is settled.

[zmjeeps]

Thanks Dusty!!

Big thanks on this project goes out to Dusty (a member here) who put up with a bunch of dumb questions from me (where does the fuel line go?) Dusty REALLY knows his stuff when it comes to diesels and 4bts. I was sending him pictures so I could ask him questions and he would ask about the Jeep parts of the build and I was asking him about the Diesel parts of the build. Good thing we are on opposite sides of the country, we'd be dangerous together

Zack

[zmjeeps]

Added a few more early photos of the cab being prepped.
www.photobucket.com/humpty

Zack