FourEightZero
OBS Enthusiast
This is not a Vortec.The Vortec engine has flow out of the front of the intake manifold when the thermostat is closed. That's part of the OEM coolant bypass system.
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This is not a Vortec.The Vortec engine has flow out of the front of the intake manifold when the thermostat is closed. That's part of the OEM coolant bypass system.
NVM. Just realized it's not your thread lol.This is not a Vortec.
Yeah, my plumber roommate pointed that out too. Both handles pointed vertically during the summer, point em both back toward the firewall in the winter.
This is not a Vortec.
Yup. Vortec or pre-Vortec, SBC, BBC, V-6...they've all got an OEM bypass.The TBI engines have a bypass internal to the water pump, I believe. The Vortecs did it externally.