loud engine

[X5V8RULES]

everything normal , no cel just a loud engine sound in the cabin ( the sound is normal from the outside). i can hear the engine working espcialy between 3000 and 6000 rpm . could it be an exhaust leak ? ( the sound would be a lot louder from the outside??!!) or a bad engine mount ( no vibration) ?

ps : it feels like im sitting in the engine bay

[Isambard]

it all depends on the kind of sound you're hearing

[X5V8RULES]

Originally Posted by Isambard

it all depends on the kind of sound you're hearing

I will try to post a sound clip tomorrow

[jst2878]

the exhaust manifolds tend to warp on the v8's. most likely its your gaskets on the manifolds.

[X5V8RULES]

No cel ! O2 sensor should find the problem !? Maybe there is a leak after the cat

[X5V8RULES]

Does it cause bad mpg???

[X5V8RULES]

Forgot to say that the sound is more noticeable when the engine is warm. Is the exhaust manifold gasket easy to replace. (I have to lift the car to do the job?)

[X5V8RULES]

Any answer?

[masterjohnson]

Originally Posted by X5V8RULES

Does it cause bad mpg???

i think the answer here NO. oil leaks just bothers me because if ignore a part that is leaking with oil sooner or later you will regret ignoring it and you will be replacing some parts aside from the gasket.lol. anyway just post the sound clip mate so we can have a conclusion.

anyway for you to have an idea on prices of bmw engine parts here something that i can contribute for you.

[Nik]

Man, you are a funny guy))) I check your posts and know that I will crack up... what has O2 to do with a sound? you have your way of examening stuff, that you actually never check after all ))
Exhaust manifold gaskets are hard to replace, not only lifting the car is neccesry, but have to remove most of the stuff from engine bay to get to it.
BTW you can hear it working from 3000-6000 because your engine works at that RMP.
Do you hear any weird sounds when it changes gears?