LMM: Crank replacement without head removal!

[duramaxzak]

I was wondering if its possible to replace a broken crank with out removing the heads? I have a complete 08' LMM with a broken crank that I would like to fix with the least amount of time and money spent. I already have a good crank for it.

Thanks for any info!!! Zak

 

[DIESELMAFIAPER.LB7]

It can be done kinda be a pain in the ass but it can be done it's not worth the hassle imo though

 

[duramaxzak]

Well maybe I will just part it than!

 

[LWATSON]

I know someone that just did one, it takes a few exta hands and you have to kind of roll it in. I bet it would take 4 people to do it but it can be done.

 

[tracygto]

when the crank broke it sent small parts of the crank throughout the entire engine. If it was me i would do a total rebuild!!!:thumb:

 

[TheBac]

I know someone that just did one, it takes a few exta hands and you have to kind of roll it in. I bet it would take 4 people to do it but it can be done.

For how heavy the Dmax crank is, that would be one tough job. Damn.

 

[hondarider552]

I was like mr potato head loosing his arms on toy story when I try lifting a Dmax crank:rofl:

 

[Chevy1925]

I was like mr potato head loosing his arms on toy story when I try lifting a Dmax crank:rofl:

I can vouch for him loosing his arms lol

 

[mike diesel]

I have a crank sitting right here, you guys must be pussies or something.

 

[Hot COCOAL]

when the crank broke it sent small parts of the crank throughout the entire engine. If it was me i would do a total rebuild!!!:thumb:

This
x100
At least take it down to the block, spray it down brake Kleen and inspect all the friction surfaces.

I know, I know, more time and more money...

I have a crank sitting right here, you guys must be pussies or something.

:joker:

 

[duramaxzak]

I bought this motor from a guy that replaced his. I was thinking if I could replace the crank cheap I Would sell the motor complete, but looking like I'm going to be better off just parting it out!

 

[SmokeShow]

The engine is out on a stand or in a truck?

If it's in a truck & you're talking about parting out the truck if you can't R&R the crank with it in the truck, sorry but that's ridiculous. You'll spend waaaay more time taking the entire truck apart to sell it piece by piece than you would if you'd spend half a day pulling the engine. Then R&R the crank on a stand & put it back in the truck. So I'm failing to see the logic in parting a truck out rather than pulling an engine in the name of saving time & effort????

 

[duramaxzak]

The engine is out on a stand or in a truck?

If it's in a truck & you're talking about parting out the truck if you can't R&R the crank with it in the truck, sorry but that's ridiculous. You'll spend waaaay more time taking the entire truck apart to sell it piece by piece than you would if you'd spend half a day pulling the engine. Then R&R the crank on a stand & put it back in the truck. So I'm failing to see the logic in parting a truck out rather than pulling an engine in the name of saving time & effort????

I only have the motor!!!

 

[Fingers]

You can swap the crank without stripping the rest of the motor. But you need to be aware of a few things.

Frequently, there is other collateral damage from the crank breaking. Rods mangled, cylinders scored. Any of that, and you are back to a full tear down.

You will have to rig a way to keep the crank suspended as you work it in and out of the block. Even if it is just ropes to an engine lift.

You can not get all of the pistons completely to TDC because of the valves. It is important to find the sweet spot where you can get the most clearance.

Running a string around each rod helps you align the rods as you lower the crank in. You can tie each string off to hold the rod's position as you lower. Then adjust, lower, adjust, lower.

IIRC, you have to actually rotate the crank as you lower it to get it in.

Bottom line; it's a pain to do it that way.