bobsquatch
Active LVC Member
I thought a new thread might be appropriate here. My engine cooling fan gave out a while ago on my 2005 LS V8. I was repeatedly bleeding the cooling system thinking I had trapped air causing the overheating. I was not driving the car, just repeating the air bleed procedure shutting it down as the gauge read over temperature resulting in boiling over when the engine was turned off. Finally I realized after 3-4 frustrating attempts that the cooling fan wasn't working. I replaced it with a used fan and everything works perfectly. Now, likely due to overheating I have a wandering coolant leak. After properly bleeding the system, there are no leaks while running/ warm. After shutdown still no leaks for 10-20 minutes then at the front of the engine. This leak will persist until the degas bottle is empty overnight. If I restart the engine after the leak has begun it will cease but now the system has air in it resulting in coolant leaking from the degas bottle area soon after shutdown, likely from excessive gassing. I can watch it fill quickly after engine shutdown. I can't see where the leaks are actually coming from so I ordered a bore scope camera to get a better look. I am wondering if it might be the intake manifold as you have to drain the coolant to remove that or any other common leak point. I have replaced all cooling system plastic parts except the radiator and the one that required removing the intake manifold with factory parts. I think I have the last piece laying around my garage somewhere so I guess I'll start there once my bore scope arrives tomorrow. Any thoughts on where else to look are appreciated.