I have a strange howl/whistle from my engine. It comes in around 2,500rpm and comes and goes, sounds like induction or exhaust. The dealer I recently bought the car from changed the belts and the aux tensioner, which is what we thought it was, but it's still there. Comes in when engine is hot, then comes and goes. I have a feeling it may be a cracked exhaust manifold, as it is affected by a) heat and b) trailing to balanced throttle only (ie, when the exhaust will have some back pressure). Floor the throttle and it goes away.
Makes it sound like a poorly setup turbo!
Otherwise car/engine is perfect, only 18,000m, engine sings and revs and produces good power.
Have you heard of this before? I read in a buyers guide that the manifolds can crack.
Any ideas, verification or not of my diagnosis is appreciated.
Makes it sound like a poorly setup turbo!
Otherwise car/engine is perfect, only 18,000m, engine sings and revs and produces good power.
Have you heard of this before? I read in a buyers guide that the manifolds can crack.
Any ideas, verification or not of my diagnosis is appreciated.