so i see people doing a custom dual pass all the time. i bought the parts to do it as well. what i cant understand is how it flows. so when u drill the hole are u alligning it up between the 2 holes in the middle since they will be pushing the coolant inside the intake manifold. then what about the two other holes where the coolant comes out, does that mix with the cold coolant or is there a wall the seperates them form one another?

 

Stock system flows into the top core, down to the second, then the third, then fourth, then out.

the dual pass turns the first and fourth into the "in" and the second and third cores become the "out"

Stock is four pass, the new endplate turns it into dual pass. It's more efficient.

 

i thought the 2 and 3 are in and the 3 and 4 are out?

 

read what you wrote. think OooO

 

good eye John

 

I may have had it backwards. John has it right, its just important that it's now dual pass.

 

Try this (without option B)


Blue hose is from out of the heat exchanger to the center fitting of the dual pass plate ...which makes oOOo. OOOPS lol

 

Is that diagram correct?

 

in 2 and 3, out 1 and 4. looks right to me. if its not right. too much effort went into a waste. hahah. which i doubt that's the case

 

That's an '04 Ion Redline diagram. When they were backwards.

Biggest problem i've seen with using the center as an outlet, is that you can trap air in the manifold. If you have the top fitting as an out, any air in there will work it's way out sooner or later. Figured that out the hard way a long, long time ago.

 

hey! how come that diagram is using the factory mounts!? wtf mate

 

Ital the pump was wired backwards in 04, nothing to do with the laminova plumbing. with respect.
you can plumb the plate the other way if you wish. its all in how long the coolant stays in the laminova. This is how GM plumbed it and the diagram is in the dual pass kits. Option B takes care of the air...nothing better than that...



all this was posted on myfakevo's thread about the same thing

 

Those are some pretty pictures. Have you been holding out on us John?

 

this looks right to me

 

I saw one with the routing reversed on the intercooler pump. Came out of the H/E and into the pump, then to the manifold and so on.

 

That is how the stock system is setup. From the HE, to the pump, to the lower port of the 4 pass endplate, out the top port of the endplate, to the coolant neck, back to the HE.

http://www.youtube.com/watch?v=CXarMxZtmI4

 

Right. The 04 redlines used the system John posted. Everything else is different.

 

Stock Cobalt SC's are no different from Redlines SC. Really.

 

I've seen it John. I didn't understand it, but i've seen multiple cars.

 

It must be one of lifes mysteries lol. I got 3 sc 'balts coming in I will check every one and take piktars and PM you....cheers

 

The pluming is the same on all 04-07 and 05-08 LSJ Redlines and Cobalts. The only difference is that all 04 and some 05 RLs had the IC pump WIRES reversed. So the pump was running in the wrong direction.

Powell figured out the problem and passed it on to GM.

http://www.ionforums.com/forums/prob...b-05-06-a.html

 

soooooooo, is this diagram correct to run then?

 

bump for post above ^^ ??

 

ya thats correct...u can see the blue hose is the cold coolant. then it goes in the dual pass, goes threw the intake manifold. then comes out of the dual pass again. then in the tee and filler neck. back down to the intercooler pump and back in the Heat exchanger

 

cool, thanks man