my truck has a cracked 53 block. to fix this i have a spare 12v block and want to swap the guts of the 24v into the 12v block. So i been doing a good amount of research and came to the conclusion that this can be done. So i gutted the 12v yesterday and pulled and gutted the 24v today.

I then noticed(probably too late into it) that the 24v has a crank sensor and the 12v does not nor has a location for it. So is there any way i can add a crank sensor or manipulate the computer into thinking is has one? the 12v has a harmonic balancer with the crank sensor ran off of that. thanks

 

The crank sensor on balancer has very different function.
Well, let's see. You can run it without the sensor and get crummy performance, ect. Plus a continious fault code that probablly derates the engine to a sick ***** cat. The 2000 and later did not have a crank sensor, but they did change computer language so that is very difficult to accomplish. Did you think of chocking your research geru???

 

ok... so i am going to be paddling up a river with no paddle... great... Anybody got any ideas? What would have to be done to run a 2000 and newer computer?

 

Why not mod a tone wheel to the balancer and mount the crank sensor to the gear cover

 

possible i guess but it would be difficult

 

the 24 valve uses the cam position sensor underneath the vp44 in the timing case correct? i know the 12v has that harmonic balancer pickup for the crank sensor but thought the 12v ran off the crank and the 24v ran off the cam sensors. if thats the case then i don't understand where you'd need to put the cam sensor; you would still have the old 24v front gear case to put your 24v cam sensor. Unless you're doing a ppump swap also, then i could see you needing to put the cam sensor somewhere.

iirc there was someone who rigged something of that nature up for a ppump conversion. I was seriously considering doing one and read thoroughly but backed out when i got a bum pump and needed the truck asap. the part he mad was a modified front gear case so that he could put the cam sensor and the pump TDC holder both in one case.
I hope this helps!
TNutcher

 

oops i re read your message and you said the 24v has a crank sensor too.... i'm not sure where it is at on the block, but could have sworn it just used the cam sensor.... well hope that last message helped some but it probably didnt haha guess i need glassses
TNutcher

 

You will swap the 24V case onto the 12V block... sooo the cam sensor will still go in its orignal place on the 24V case..... Tab the KDP while you are in there!

 

yes i have to swap the front but they also have a crank sensor next to the starter.

 

ah crank sensor...

 

If I recall the crank toothed wheel is very sensitive to position and signal. A degree or two off and you have a pussycat again. Do not know of any reference as to where or when the sensor is timed to.

 

If the balencer has a TDC mark then the tone wheel can be mounted to refrence that mark. The tone wheel has 35 teeth. the notch is where the #36 tooth would be. The notch represents 60* BTDC. So, on the balancer you would place the notch 60* to the right of the line(on the balancer)

 

I'm just firing out Ideas, as I have not ever opened up a cummins yet, could you not use the 24V crank and drill the 12v block to accept the sensor? or are all the parts too different?

 

thats what i am thinking about. there is a flat spot on the 12v block that is tyhe exact location of the sensor. but how is the sensor installed... threaed or push in with o ring seals? would that idea work?

 

I would think a decent machine shop could build a fixture and transfer the hole to old block.
Say start with a tube that fit the crank sensor hole. Get another tube(pipe) that fit over that tube. Build a bracket located on oil pan holes. Weld second tube to bracket that has been extended upward. Use bracket and 2nd tube as fixture on 12v block and drill appropiate hole. Some precision required.
Will the 24v crank fit a 12v? Look and measure before you jump. Are there additional variations in the blocks? Definitelly Yes!! So look and measure ten more times. Any luck finding a 24v bare block????