Turbo noise I have a musso sports turbo intercooled that makes a loud turbo spooling noise when under load ,is this normal

have a turbo boost pressure test done under load on a chassis dyno
under load the boost should be right up
check for leaks in the intercooler hose fittings or cracks in the intercooler
black smoke under load indicates a faulty turbo or turbo air leaks.

locate the waste-gate and see if you can cover it temporarily while driving. see if this changes it any. It could have a pin sized hole in the diaphragm. just a guess.

Leaking of any fluid is not normal. The only time any fluid should expel from the car is if you have overfilled something. Your turbo could need replacing, you could have a hole in the intercooler. Have you noticed any lack of performance or extra smoke...

turbos normal make a whining noise under load noise may be present more then before if you have changed anything on the intake side sometimes it can be as little as a lest restricted air filter other cause is lose piping but some power loss would be noticeable if this was the cause
hope this helps good luck

10-15 sec. O.K.

Check for air filter or exhaust restrictions

check for cracked manifold
of a turbo diesel check for air leaks at the hoses , intercooler when under boost pressure

I am assuming yours is a Turbo? because it sounds like an air pipe has blown off, have a poke arround under the hood, try and locate the turbo (I know it is tight under there) and follow the pipe to the intercooler, make sure the worm drive clips are on and tight, then follow the pipe (about 3 inch diameter) to the inlet, make sure the pipes and intercooler are intact. Did anything happen just before this problem? any work done or anything run over>

Can you hear the turbo spooling up? If yes do you hear an air noise... could a number of things from bad turbo, air to air leaking or its piping, or something simple like a clogged fuel or air filter.

It's probably the turbo you're hearing. They spin very fast and make a noise like that. Ever hear an 18-wheeler go by you and accelerate and they make that high-pitched whistle? That's the turbo spooling up. Now, if it sounds like a dentist's drill, that's usually a sign that the turbo is failing, but I'd bet that since your car is under four years old, as long as you've kept up on the maintenance, it's the normal turbo spool.