Ford 861 Diesel Crankshaft Options - Old Style No Balanc

[jezow2010]

Hi,

I am currently in the throws of a full rebuild on a ford 861 diesel. I think but do not know that the PO ran it out of oil and it spun rod bearings 2&3 and the middle main bearing.

I got the crank ground to 0.020" under and it is still not cleaned up. I do not think I will run it like it is (pics attached).

This is the old style engine with no balancer.

1. Should I get the crank welded and ground on the rod journal that is shown? From what I understand these engines are prone to crank failure and many do not recommend grinding at all.

2. What are options for replacement cranks? There are a few good used ones out there but they may need grinding. Then I seem to be right back where I started. Is the on one the store here a good crank?

3. Can I put a crank with the balancer teeth in the pre-balancer engine? Do I need to add a balancer to this engine to help the crank life?

I would appreciate any advice! I do not want to put this together only to have to take it apart again!


video if anyone cares - https://youtu.be/PJ6PaEFt-dU

 

[shaun wallace]

If still aviable new crank will have balancer gear on it.

 

[Dean]

These engines are known to break crankshafts, balancer or otherwise.

I would not use your existing crank but find a good used identical replacement.

 

[pomester]

Our host sells new crankshafts for your application.
861 Diesel Crankshaft

 

[jezow2010]

Can anyone shed any light on these cranks? Sometimes it seems the old original metal is better. I want to make sure that the new cranks are made to the same spec, forged, etc.

Also, can you add the counterbalance to these engines and is it recommended?

 

[Dean]

Don't know anything about the aftermarket crankshafts but I avoid aftermarket parts like the plague (too many bad experiences in the past) and would not even consider an aftermarket crankshaft, even for a gasoline engine.

Find a serviceable used OEM crankshaft.

Do not have your's ground.