hi, hows things? new to this forum and would appreicate any input have currently been aptempting to overhaul my 924 turbo (why says the wife) after going to a rather dodgy garage that didn't actually do the work they charged me for.Cars sounding a little tappety , possibly losing compression but not a lot ,quite a strange noise coming from what appears to be front section of exhaust just after the manifold .little like a quiet tractor , deep throaty sound from rear and running smoothly any idea's as close to losing sanity many thanks joff