I can't figure it out.

A strange noise seems to be coming from the front of the engine. It increases/decreases in pitch with engine RPMs but seems to be a half-second off. The noise is also loudest when the engine is cold and gets progressively quieter as the car warms up. Is it possible that there might be some sort of flow obstruction in either cooler or the lines that is causing the oil pump to make noise?

I know that both oil coolers are getting oil for sure. They both heat up at idle and when driving, the car runs a few degrees lower than it previously did with the single cooler.

Any ideas?

I'm gonna try and get video in a little bit...

 

Bump.

It's been raining solid so I couldn't get good video of the sound. I'll try again once it clears up a bit.

 

Did you prime the motor when you installed them? my guess is you have air in the lines??

 

I guess it's possible but I don't think air in the lines would cause a sound that rises and falls in pitch with RPMs.