Hi mate. Thanks for the quick reply. Im pretty happy its Not a manifold fault. I could be wrong but from the fact i can feel the air leaking beneath the manifold suggests its coming from elsewhere. If it helps narrow it down the noise is more of an air chugging or sucking noise when the car...

Hi All. I have a 1997 4.0 P38. It has developed a noise which I initially assumed was the exhaust manifold (drivers side) blowing. I removed and inspected the manifold and found no obvious faults so replaced with new LR gaskets. Still making blowing noise. I then replaced manifold. Still making...