Has anyone put a 12 valve in an '06? Can the vehicle be made to interface with it? I know the 12v engine can run with one wire, the fuel shutdown solenoid. Can the front covers swap so all the accessories are '06? Can the rear adapters and flywheel swap to mate the G56?

Or, maybe easier, can the heads swap? Piston change due to valve layout in head? If covers swap then p7100 bolts up?

Let's say the goal is a mechanically injected engine with the p7100.

How much of this stuff interchanges?

Do not see a conversions category on this forum.

 

Hmmm - what wrong with your CR engine?

In Illinois, it's illegal to place an engine in a veichle older than the model year of the truck. May want to check this out for your state first - might make for a real go-round when sale time comes.

 

Actually, you don't even need that wire, a push/pull cable works well.

The front drives, covers are a no-go, but if I remember correctly, the 12V stuff is in roughly the same location.

Back of the engine is a straight bolt on.

I think you are getting into a mess though, interfacing the mechanical engine with the rest of the drivetrain/body. We have a conversions forum here, might want to post it there as well.

 

It would be cheaper to just fix the CR.

 

Thanks, good info. I'll look at the conversions forum.

 

I wonder about that. How much are a set of CR injectors? And I'm told they only last around 250,000 miles. I don't like the 3rd injection event sooting the oil. I don't like the exhaust valves closing before TDC to enable EGR. So cam change. $600 - $800 for a decent programmer. Hate the DM flywheel on the G56. So right away I'm looking at more money than a good running 12 valve whole truck that can be canabalized for parts. The 12 valve with the p7100 pump was a very crisp running cheap to maintain beast.

I guess all the electronics is making me nervous. Maybe I'll settle down in a while.

 

Nothing is wrong with it now. But based on what I read here compared to what I read in the late 90's and my experience back then with the mechanical engine I would say a lot of reliability has been lost and a lot of complexity and cost added.

I hear what you are saying about the legality of an engine swap. Practically every mod done today is also an emissions violation. If I did a swap I would keep the CR engine and put it all back at time of sale unless someone wanted the 12 valve.

A good running lightly moded 12 valve with a cat converter will pass any emissions test. If the CR engine sticker was transfered to the 12 valve I seriously doubt anyone would know the difference. Most emissions tests today don't lift the hood. the tailpipe tests are crude so it is easy to tune to pass with modifications as we already know.

For me I think the 12 valve p pump engine was the best overall engine ever put into a vehicle sold to the general public. The CR is a great engine against the competition but cost to maintain is high. The EGR mods are hurting the fuel mileage and sooting the oil.

Just another sign of old age, I suppose...

 

I am interested in doing something similar when the electonics on this thing go kaputs.

 

i've wondered about this. i know i'd love to get my hands on a 12v.

 

id imagine it would be a ton of work. doable yes but very very hard to do. the best thing would be to sell your 06 and get an older one and do what ever you need to it for the money you sold your 06 for even if you found a 12 valve with some rust you could get it fixed and not have to worry about if you did something right with a swap like this your reliability issue might be worse!

 

If you were to swap it into a 6 speed the real issue would be your heater controls, dash and your brakes. Which someone probelly alrea y has a standalone computer for.

I often wondered if swapping out heads would work using a VP44 and new injectors.
I do think it is doable with a 12valve, have to figure out how to make everything else work as it all depends on ECM signals to function.

 

Ok how about this for a start? Keep the '06 engine ecm plugged into the existing harness in the truck but with the wires to the injectors and non essential sensors unplugged. Exchange engines, leaving the '06 engine ecm in the truck and plugged in, just lay it aside in the engine bay. On the 12 valve engine swap over the oil pressure and temp sensors, grid heater wires, starter wire, and attach the alternator to the existing harness. Tap one of the many circuits for the fuel shutoff solenoid on the 12 valve. Wire the fuel tank lift pump to be on same circuit as the 12 valve fuel shutoff solenoid. Road Speed cannot be measured by the engine so I believe that all the gages would work except maybe tach. But I thought tach had a separate pickup?? So swap over the tach pickup to the 12 valve. Let the engine ecm throw codes all day long, it won't have control over the 12 valve. throttle pedal will need exchanged for one with a cable. The overhead mpg will not work.. Big deal it is wrong anyway.

I'm going to think about this some more.

 

I know what you are saying. I looked at some 12 valve trucks but they are getting old and I want to stay current. Not that I like the Dodge interiors that much but the 3rd gen has some nice upgrades especially on the Laramie.
If I had found a pristine 12 valve truck I probably would have bought it. I like the mega cab too.

The other half of this is the fact that I like a challenge and to have something unique.

 

yes unique is cool and im sure you could do it i would probably swap the trans and everything out of the 2nd gen do a 5 speed and go from there

 

I had 2nd Gen 5 speed with GV overdrive which made for perfect 7 speed gear spacing. Loved it. I was figuring on keeping the 6 speed that is in it. Someone already said the 12 valve would bolt right up to the existing 6 speed.