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I just bought an ls6 intake and it's coming with the crossover pipe, but I can't seem to find a place that sells the plugs, anyone ave any suggestions for where to find them or other solutions? Thanks
Edit: Gonna call the dealership and see if they have the plugs, just got the part number (2x 2001+ rear coolant plugs - #12562788) from ls1howto.com, any other options that may be cheaper lol?
Yes, I haven't pulled it off yet, I was wanting to make sure that I had everything needed so I could have it back on the road the same day, it's my daily.
I recommend you retain the four corner cooling piping. The bottom of the LS6 manifold is flat causing the ribs on the bottom to hit the coolant lines. You just need to shave off the ribs where the line passes underneath.
While you have this all apart, are you doing the LS6 valley plate/PCM upgrade?
Fresh knock sensors and OPSU are wise to do at the same time, the intake needs to come off to do all this.
Expect to find a lot of junk under there from the LS1 PCV system, they're not very good.
I recommend you retain the four corner cooling piping. The bottom of the LS6 manifold is flat causing the ribs on the bottom to hit the coolant lines. You just need to shave off the ribs where the line passes underneath.
While you have this all apart, are you doing the LS6 valley plate/PCM upgrade?
Fresh knock sensors and OPSU are wise to do at the same time, the intake needs to come off to do all this.
Expect to find a lot of junk under there from the LS1 PCV system, they're not very good.
That may as well have been a picture of mine after I pulled the intake. Ended up pulling the heads to clean everything up. then, P/P and mill since they're out. these projects grow fast
Paul is right - keep the LS1 crossover and make it fit. much better steam venting if you do. do the LS6 valley cover. You stand a good chance of breaking the OPSU during removal and install anyway. Better to have it so you're not delayed reassembling your car.
Yep. When I pulled mine it was filthy under there. I ordered a nice set of 4 corner cooling off this guy on eBay. Braided hoses and aluminum billet fittings. Turned out nice. Just received my new ls6 pcv valley cover also so intake has to come off again! Great advise guys!!
I was able to make that ls1 tube work with some careful rebending. I like the assurance steam gets back to the radiator. My photo album shows one pic with the pipe installed over the ls6 cover
I did not feel comfortable blocking off the rear coolant vents either, even though the newer motors came with the rear vents plugged.
Instead of bending and hitting the stock crossover tube with a hammer, I bought an extra ls6 style crossover tube. It worked like a charm! I added a brass T-fitting to the front and ran some extra fuel line I had lying around to connect the T to the rear. I routed the new coolant line under the wire loom on the valve covers. When I tuck my wires this summer, I will have to get creative, but for now it serves its purpose!
Glad you found a solution you like. The crossover tubes are soft. Used a tubing bender to prevent crimping. Worked great. Either way, you got a solution you like. That's what matters
03-05-2015, 09:00 PM
LS6 coolant crossover piping/plugs options 
