My Rochester is Whistling!

[e-tek]

I thought I had fixed a LOUD whistle (Vacuum leak) coming from my rebuilt Rochester in my '46 Merc (Flathead 8). It went away when I replaced and filled the Air Cleaner's Oil bath - for about a week, but now it's back. It's a vacuum leak of some sort but I couldn't find it with a tube and trying to cover different areas, plus, I sprayed starter fluid around it but no idle changes.... Anyone heard this before or have any ideas on how better to pinpoint the leak? Thx!

[effie_man]

i refer to what i wrote in you other post in Man/sask forum . welcome to the flathead section where all the gods live lol

[Kazoo]

Didja check the oil level in the air cleaner?? Whatever is whistling could be suckin the oil out, maybe thats why it came back.

[WerbyFord]

I've had the Whistle numerous times, it has always been a bad seal at the carb base gasket to the intake. It will run ok, just whistle. If it was any worse it would behave like a vacuum leak. It was worst on one carb I had with a warped base, I'd just put up with it. Change base gaskets and check that the gasket covers everything fully, that is my bet.

[e-tek]

Thanks guys. I drive this truck several times a week and hadn't heard it until just today again - most of summer nothing. I'm gonna check for leaks again and add a gasket to see if that works.