When my engine is cold and i blow air into the top radiator, i can hear it bubble in the resivior tank, is that normal? With that in mind, after i drive it for 10-15 minutes my temp gauge starts to climb and when i turn off the engine, i can hear bubbles boiling in the stock reservor tank. any thoughts on why?? engine was rebuilt in 06 with 3mm seals and race ported with no cat but since then i put about 7000 miles on it.

 

There could be a couple different things that would cause that. Unfortunately, without seeing the car, it would be hard to tell you exactly what the problem is. Feel free to give us a call if you have any other questions.