I have a '06-'07 LQ4 that has a 24x wheel on the crank and would like to convert the shortblock to be able to run with a 58x GenIV wiring harness. The motor is going into my S10 and would like to run a IV setup due to PCM speed and throttle body issues. Right now if I use a GenIII harness I'll have to buy a Dr.X harness for 220 bux which will only bring headaches when it starts acting up. I have L92 heads/intake/tb that I want to use with my LQ4. I'm building a custom 58x harness to keep the install clean.

That being said, I know I need to pick up a 58x wheel and install it on my crank and get an appropriate crank sensor that'll work with my harness. From what I can tell I need the gray crank sensor?

For the camshaft sensor I'm a little puzzled, but I think I might have it kinda figured out. From what I gather I need to pick up a 4x cam plate along with a LS2 timing cover to work with the 58x style timing set. This sound right?

 

Yes. It might also be possible to just swap cranks. Although I'm not sure if balance issues would come up.

And Yes.

 

Awesome, thanks for the help. I'm just going to use the stock crank since it's in perfect shape and swapping the wheel is easy, so says the machine shop, so we'll see. I'm gonna round up some stuff next week for it and get the block in the machine shop asap.

 

How could balance issues not come up? Even if you knew that stock LQ4 cranks were balanced to some standard bob weight, which is probable, how would you know that the standard hadn't changed? I would want my rotating assembly balanced.

 

I do believe that the stock cranks for the truck motors are "balanced" from the factory and don't need balancing. That's what I've heard, I don't have any info on hand to back it up though. Of course, in all applications you'd want to have your setup checked anyways to make sure it's fine.

 

Just an update to the thread, I order the following parts from GMperformanceparts dot com earlier for the conversion

12586481 - 4x cam plate
12600325 or PK12600325 - LS2 cover with grey sensor
12588670 - chain damper
12586768 - 58x reluctor wheel

Wanted to list the part numbers for other people looking. Spent 120 bux with shipping, not too bad and I think it's worth the money.

 

bringing this from the dead, what about knock sensors? I currently have an LS1 I'm going to just buy a crank 58x, and buy a 58x cam, those part numbers you have down, so the knock sensors stay where they are at?

 

Holy old post batman!

The GenIV knock sensors you can bolt to the side of the GenIII block like the GenIV are installed. There are a couple of spots you can use to bolt them. Don't believe the stock knock sensors will work with the GenIV harness at all. One wire signal as opposed to two wire.

 

AYYY my man!, its funny my dad was telling me, "lets just JB Weld them onto the side of the block..." then i thought hmmmm lets do it!
i guess i just need to look at my truck and see where it has them bolted onto!

 

Lingenfelter makes a box to change this

 

They don't - Lingenfelter only makes a box to use a 58x motor in a 24x harness not the other way around.

 

oops don't listen to me my bad

 

Bringing this old post back from the dead and TY for info

 

So a little more info on the knock sensors : Casper's Electronics makes a harness to adapt LS1 to LS3 as well as LS3 to LS1. I'm actually using their LS3 to LS1 harness on my LY6 swap into my 2001 Suburban this weekend. I'll use the stock LS3 knock sensors and their harness plugs into them in their stock location, then routes to the stock 2001 knock sensor location.

No problem! Glad it could help someone else out.