I have a 53. Block in a 2006 International 4300 service truck that cracked 3 years ago so I Tig welded it & it held up until now.  I’ve got access to a couple 6.7 short blocks.   Will the my new Vp44 pump with the 24v cylinder head work on the 6.7 block?  Any input would be greatly appreciated.

There have been a handful of VP 6.7s made. If I remember correctly you need different connecting tubes, the entire gear train swapped over and the timing case modified I think..

 

The gears in a VP44 truck are helical cut but 6.7s are straight cut. The crank gear is a royal PITA to swap because the press fit is so tight (one of the ones I read about was, might have been exception vs the norm).

 

It would be easier to get a billet timing case and cover than to do the modifications needed on stock parts I think (not sure on this after rereading some forum posts).

 

Keep the CR head, it flows better.

 

As a reference, search for p-pumped 6.7s. The majority is the same except the different timing case and injection pump.

 

https://www.enginebuildermag.com/2021/01/dotw-vp44-6-7l-cummins/

https://www.cumminsforum.com/threads/vp44-on-6-7-block.2024442/

 

 

On 5/25/2022 at 7:10 AM, Silverwolf2691 said:

There have been a handful of VP 6.7s made. If I remember correctly you need different connecting tubes, the entire gear train swapped over and the timing case modified I think..

 

The gears in a VP44 truck are helical cut but 6.7s are straight cut. The crank gear is a royal PITA to swap because the press fit is so tight (one of the ones I read about was, might have been exception vs the norm).

 

It would be easier to get a billet timing case and cover than to do the modifications needed on stock parts I think (not sure on this after rereading some forum posts).

 

Keep the CR head, it flows better.

 

As a reference, search for p-pumped 6.7s. The majority is the same except the different timing case and injection pump.

 

https://www.enginebuildermag.com/2021/01/dotw-vp44-6-7l-cummins/

https://www.cumminsforum.com/threads/vp44-on-6-7-block.2024442/

 

 

Thanks for the info Silverwolf.  It’s coming together quite nice.  Going to run the 6.7L block, bottom end & head with the 5.9’s VP44, injection lines & injectors.  I’ve got the gears on the crank & cam switched over with the 5.9’s front cover on it.  I’m going to run the 5.9’s ECM Jwith a Quadzilla tuner.  I was running a compound setup with a 50 primary?, (it came off of a old yard goat truck that had a M14 in it). It’s feeding into the stock 35 Holset out through the international’s cooler then into the 24v head.  
I have just been handed today a brand new variable pitch Holset with the new exhaust manifold that has a spot for a blowoff valve I’m assuming cast into it.  Im sure that someone makes a controller for that variable pitch other than Cummins or Dodge so I’m going to have to do some homework.  I’ll post some pics here when I get time.

Tanks again Silverwolf for helping me out.

 

Sep

I’m trucking right along.  Got the crank gear off with a homemade gear puller I made on the lathe.  With a little bit of heat & a 10 ton ram hooked to my power unit it came off with around 3 to 4 tons of pressure.  I’m going to hit the crank with some carbon dioxide because I’m a little short on nitrogen to get it cold & heat the gear up on my bearing heater n it should slip right on right? Lol it should get most the way then I’ve got a press setup with the 10 ton ram n power unit if it gets hung up at all.  To run the 5.9 cover I had to drill & tap 7 holes 8mm x 1.25.  Two of them are new holes at the bottom where I had to Tig the old holes up with nickel rod then sand down the high spots.  Just got done mag drilling them out & heading to fastenal for some Helicoil inserts.  I should have the front end done tonight then it’s off to see what I need to do to make these 250hp 5.9 injectors work in a 6.7 head.  Hopefully by the end of next week I’ll have it back in a 2006 International 4500 service truck.  I’ll post some picks here later on.  Thanks again for everything Silverwolf,

 

sep

How did it come out?