Coolant Drain Cocks/Valves on LS1 Block?
02-25-2010, 12:45 PM
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Coolant Drain *****/Valves on LS1 Block? I've searched but haven't found anything about this yet. I'd like to set up drain ***** on my block to facilitate draining coolant before pulling or working on the motor. As I understand it, there are two brass hex plugs on each side so I'm thinking I could pull these and drill/tap NPT threads for whatever size valves I can find to fit. I believe these plugs are different sizes. In a way, I find it hard to believe I'm the only one interested in doing this. Maybe I just haven't found it yet. I've installed these on Gen II blocks for years and it really makes it a lot less messy especially when pulling the heads while the engine is still in the car. With a little shop air through a few ports to blow out the remaining coolant, I can pull heads with virtually no mess. What do you guys think? Drill and tap the brass plugs or is there something I'm overlooking? Thanks
