Is there certain years of 6.7 that will work or will all years of the 6.7 starter work on an 06?

 

I never ordered a special year 6.7 starter. So all years should work.

 

That's great cause I found a 6.7 starter from a 2024 engine with only 5000kms for only $250 CAD

 

Don't forget the M8x40 bolt + the bushing.

 

I thought the bottom stock bolt could still be used, but with a spacer?

 

some folks just run two bolts, it’s all personal preference

 

This doesn't surprise me lol.

 

Yeah, I wouldn’t run only two bolts with a higher torque, higher speed starter that draws more from the batteries.

With the 6.7L starter, the smaller diameter bolt, equal to the other two, can use a simple bushing to potentially reduce any rotational movement.

 

I drilled and tapped the 6.7 starter for the larger 6.0 stock bolt. Just another option for you. Did that about 5 years ago and never looked back. The 6.7 starter makes a good 6.0 starter sound sluggish. Very good upgrade IMO.

 

This is how I'd prefer to do it . What size drill bit and tap did you use?

 

I think the bolts are M8-1.25, but you may want to double check that. If I remember correctly the proper size drill was a letter size (don’t remember which). I don’t have those so I went one fractional size lower. Since the flange was aluminum on mine, I took it slow and it worked out fine.

 

The problem with using the larger bolt is that you cannot get it to its normal stretch without stripping the aluminum threads. Therefore, without some thread locking on the threads or under the bolt head, or by using a longer bolt so a nut can be used on the extended side, there is the potential for the bottom bolt to loosen and be lost. It doesn’t happen often with a 6.0L, but it does, especially with the 7.3L, and things aren’t pretty when it does.

 

Case in point on a 7.3:

A customer called me and said that her truck was stuck in the middle of a field and wouldn't start. She could hear the starter but it wouldn't start. I went over and found the starter dangling below the truck. Upon closer inspection, one of the ears had snapped off due to the bottom bolt being loose and eventually falling out. The top bolt was still somewhat in place but the damage was done.

 

So the best option is the smaller bolt with sleeve?

 

I think so if the 6.7L starter is using the smaller bolt.