I installed dual pass yesterday. After I got it all back together and I started it up, then pressed on the gas, the engine started to whistle. I was trying to locate where it is coming from and it seems to be coming from near the intake manifold. I drove it around the block and it quit, didn't have any more noises all night. This morning I started it up and drove it a little and as I parked I noticed it was back. What could be causing a high pitch whistling noise? It has never done this before, I would say a gasket but why did it quit until morning? It has been around 96F. I still need to locate exactly where it is coming from but it is rather loud, so it is making it hard to locate. Any ideas?

 

I found it. It is coming from the intake mani gasket. Time to take off the blower and tighten down the bolts again just to see if it works. Got a new gasket on the way just in case.

 

You could spray the gasket with copper gasket spray, it fills imperfections in the gasket. Fixed my exhuast leak with this stuff.

 

eh I just ordered an extra gasket. I may not need it, I need to torque the bolts to spec. I am gonna get ahold of a torque wrench tomorrow and try that, if that doesn't work take the mani back off and put the new gasket on. only thing that sucks is I will have to drain the s/c coolant again after 3 days.