396 New engine start up issue.
Ok. So my 396 engine is new, the engine harness is new, and of course all the accessories are new as well. Here's the issue- when I start the motor,I get the temp idiot light coming on within 2 minutes of it running. I have another temp switch for the Holley Sniper kit in the manifold and it's only reading about 150-160. . Also here's a pic of the header on the side.driver's side. Note the rear header discoloration, is that from coolant leaking in or just the paint burning off?. If I put the infrared gun on the heads what should the normal temps be? Also, could it be an air bubble? I forgot to drill a hole in the tstat when I installed it.
I just don't want to run it too long at this point till I know if there's an issue or not