Vacuum leak?

jayh · #1 (**permalink**) 03-05-2016, 08:15 PM

I have a Factory Five roadster with a 5.0 HO equipped with a trick flow topend kit installed two years ago. Experiencing what I think is a vacuum leak thats making a high pitched noise similar to a slipping fan belt thats not the fanbelt but coming from the top of the motor.
Anyone ever experienced such, or has an idea on how to identify leak. It's a leak that I can't readily identify the source.
Appreciate any advise.
Thanks
Jay

Gaz64 · #2 (**permalink**) 03-06-2016, 12:01 AM

Hi Jay,

How long after startup before the noise occurs?

Does the noise disappear if you remove the oil cap, or the dipstick?

Can you use a length of hose to identify the source, or spray some water around and note the behaviour/sound of the engine?

Gary

Dwight · #3 (**permalink**) 03-06-2016, 05:58 AM

---High pitch whine---need help - FFCars.com : Factory Five Racing Discussion Forum

Real Time Recon · #4 (**permalink**) 03-06-2016, 09:54 AM

Yes.Check that gasket

jayh · #5 (**permalink**) 03-06-2016, 02:52 PM

Thanks to all for the advice.
Dwight, I found your link to be especially helpful.
Thanks
Jay