I replaced the powerhead on this 88 SPL. It has a squeak,tick noise when cranking over and below 1500 rpms that the old engine did not. I ran it with spark plug wires off one at a time and the noise did not change. It does not matter if warm or cold. I have checked the flywheel and listened with a stethoscope. It is hard to say for sure but sounds loudest at the intake manifold. Has anyone out there heard anything like this ? It now is broke in and has 11 hours on it. It starts and runs good. Help!