Hi guys. I've searched all over the internet to try and find out what is wrong with my car but just can't seem to find anything that fits the bill. Any input y'all could give would be super
My car makes a grinding noise, in any gear/neutral, clutch in or out, at 3500 through 3750rpm. It starts exactly on the 3500 mark and stops exactly at the 3750 mark. It doesn't make the sound at 3400 or at 3800, just strictly between these two points, and it's a consistent sound. It is loud, audible from in and outside the car with no problem.
It sounds as if I was taking a pencil and sticking it in a tiny encased plastic fan, not a roof fan but like an oscillating fan.
Now for the variations:
It doesn't do it when I first start the car in the morning. It will after about a minute but when the car is just first warming up for the day it won't do it.
If I accelerate hard it won't make the sound going up, but when I shift it makes the sound as the tach comes back down.
I'm at a loss right now, because I think my Blow off is causing the problem but my brother destroyed my stock bpv. Hammers, brothers and bpv's dont mix. I digress.
I thought at first that it was compressor surge but the sound just didn't match up, and surge seemed more sporadic and this is constant to a tee.
I appreciate any positive input, thanks ahead of time.