HELP. Coolant Crossover Pipe help needed!!!
Thread Starter
Melting Slicks
Joined: Aug 2009
Posts: 2,785
Likes: 8
From: Sacramento California
HELP. Coolant Crossover Pipe help needed!!!
OK. Swapping my 97' LS1 intake over to an LS6. Also upgraded the valley cover to the 04' LS6 style to upgrade the PCV system.
I forgot the LS1 coolant crossover pipe won't work with the new valley cover.
So I need to change over to the LS6 style. Pulling the LS1 crossover off, I noticed no O-rings or gaskets. I have a couple block-offs for the rear I pulled off the heads of the 5.3L I have here for my hotrod. They had no o-ring or gasket either.
Called Chevy today and they sent me two schematics showing the tubes. Both styles show either O-rings or a gasket. WTF?
What should I get here? Would love to be able to keep all 4 corners connected but will end up building a new crossover kit when I do the heads/cam swap.
For now, just want to get running and the LS6 setup should work.
Any advice?
I forgot the LS1 coolant crossover pipe won't work with the new valley cover.
So I need to change over to the LS6 style. Pulling the LS1 crossover off, I noticed no O-rings or gaskets. I have a couple block-offs for the rear I pulled off the heads of the 5.3L I have here for my hotrod. They had no o-ring or gasket either.
Called Chevy today and they sent me two schematics showing the tubes. Both styles show either O-rings or a gasket. WTF?
What should I get here? Would love to be able to keep all 4 corners connected but will end up building a new crossover kit when I do the heads/cam swap.
For now, just want to get running and the LS6 setup should work.
Any advice?
Drifting
Joined: Aug 2005
Posts: 1,686
Likes: 20
From: Florida, Hell's Doorstep
You should definitely have o rings on all your ports.Do a search on google" ls6 coolant bleed hose ". You'll find all the info and parts you may be looking for dude !
Last edited by ONE BMF; Nov 3, 2015 at 08:18 AM.
Acct Suspended APR 2026 by request
Joined: Dec 2010
Posts: 10,367
Likes: 1,271
2020 Corvette of the Year Finalist (performance mods)
C5 of Year Winner (performance mods) 2019
you can keep the ls1 coolant crossover as long as you don't use the ls6 valley cover, but since you switched to the ls6 valley cover as well then you will need to use the ls6 coolant crossover... check the block after you removed the crossover and plugs, the gaskets love to stay stuck to the block and sometimes they are hard to see
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
LOL! I wasn't going to give up on venting all four ports on the heads on my 02 Z. SO,,,,,,,,,,,,,,,,,, I purchased a ZO6 style FRONT vent tube. Flipped it backwards and installed it on the rear ports.
I connected the nipple to the front using a METAL "T" fitting. I use a rubber coolant line to run from the back to the front.
YES!!! There are small "O" Rings under each fitting that MUST be there or you will have a leak!!
You will also have to bend the little cross over pipe to fit properly. Not too much but it was easy.
I connected the nipple to the front using a METAL "T" fitting. I use a rubber coolant line to run from the back to the front.
YES!!! There are small "O" Rings under each fitting that MUST be there or you will have a leak!!
You will also have to bend the little cross over pipe to fit properly. Not too much but it was easy.
Last edited by Bill Curlee; Nov 3, 2015 at 03:00 PM.
Thread Starter
Melting Slicks
Joined: Aug 2009
Posts: 2,785
Likes: 8
From: Sacramento California
I found the O-rings. Guess my eyes are getting worse than I thought!!! lol
I had two block offs from the 5.3L I have sitting here for my hotrod. Used those to block off the rear heads. Tried to bend the nipple on the 5.3L steam tube to work on the C5. Got it on but it leaks now!!! Grrrr
Nowhere to get an LS6 crossover locally. So just ordered a Trick Flow kit off Summit. They had several kits but got the one for the front with rear block-offs. When I swap the heads I will order two more fittings and plumb the rear ports as well. But this will get me up and running hopefully. What sucks is I'm getting a check engine light now but can't run the engine to test as I have coolant leaking all over!
I had two block offs from the 5.3L I have sitting here for my hotrod. Used those to block off the rear heads. Tried to bend the nipple on the 5.3L steam tube to work on the C5. Got it on but it leaks now!!! Grrrr
Nowhere to get an LS6 crossover locally. So just ordered a Trick Flow kit off Summit. They had several kits but got the one for the front with rear block-offs. When I swap the heads I will order two more fittings and plumb the rear ports as well. But this will get me up and running hopefully. What sucks is I'm getting a check engine light now but can't run the engine to test as I have coolant leaking all over!
Last edited by IRON MAIDEN; Nov 3, 2015 at 06:26 PM.
