Project: BLACK METAL - '67 Camaro

[67rally]

Here's an issue that you don't have on the sbc's. The LS engines have a steam tube vent (crossover tube) that connects the water passages on the both heads to a small line and ties back into the cooling system. It's recommended that you tie into the highest point in the system to prevent air pockets in the system.



Here's the tube in question:


Here it is removed and all cruddy (and backwards):


Before I knew what I was doing with it, I cleaned it up and painted it:


Then I cut the tube off the top of the driver's side and drilled a 11/32" hole:


Then I drilled an 11/32 hole through the top of my brand new water pump:


Tapped both holes with a 1/4" NPT tap:


Installed a 90 degree 1/4"NPT to -4AN fitting and sealed it with ARP thread sealer, and attached a 6" long -4AN stainless steel PTFE hose to it (I'm still waiting on the seals that go between the vent tubes and the heads, along with the correct bolts, so this is just for mockup):