24V Guy with a 12V Question

[Ramkids]

I am looking at two '91 trucks, both with Cummins engines. There is a difference between the valve covers. One truck has a solid cover with the Dodge Intercooled inscription, the other has what appears to be smaller individual covers over each valve set.



The first truck is an automatic, the second is a stick.

Can anyone tell me why the difference in valve covers??

 

[Phil May]

Difference

The one with the individual valve covers is probably not intercooled. Mine is like this. Some 91s were intercooled and some were not.

 

[4020Deere]

The valve covers are actually the very same. There are 6 separate valve covers (one for each cylinder). On the truck with what appears to be a 1 peice cover, they are actually underneath. The top piece that has the Cummins script on it is removed easily with 2 nuts. If one is intercooled and one is not, the easiest way to tell is to see if the intake tube that goes into the manifold on the head comes from in front of the radiator, or does it go over the top of the head to the turbo.

 

[Ramkids]

Thanks guys! I knew it had to be a simple explanation.



I am still a bit leary of a 12V Cummins, how can I possible get around without those 12 extra valves



I would really like to replace my '79 Club Cab gasser with a first generation. I will have to learn the ins and outs of the 12V. Bombing would definitely be in the future.

 

[CrewCabDiesel]

You may want to note that a non intercooled 91 Cummins(early 91") Has LARGER injectors & a higher compression ratio.

Kyle

 

[Deezul1]

Half as many valves, half as many problems. They had to add all those valves to help push the extra electrons needed for all the sensors on the overvalved (oops) 24 valve motors