Im having trouble with a 2010 versa 1.8 automatic, when starting it has a loud squealing sound for about 15seconds and fades away. I took off the belt so that the only thing turning was the harmonic balancer and it still made the noise. I took the timing cover off and removed all the chains n sprockets and guides and tensioners, everything looks fine. Put it all back together and still making that noise. Any help would be greatly appreciated.