Ive been removing components of my a/c system. Ive take the compressor out, the accumalator out and the hose between the two out. Since i've taken those out my car now makes a tinny rattling sound on start up and idle. It still runs fine though(I can hit 110mph easy). Any clues as to what is up?

 

Check the heat sheild for the exhaust.
And look for anything else that could possibely be loose.

 

Im dumb. sorry. where and what is the heat shield?

 

Hi Mr Racer,

The Heat Shield is a two-piece plate surrounding the exhaust manifold on the B230 engines. It ducts warm air to the air box through a silver/serrated hose that runs along the front of the engine bay.

If you remove the (12 or 13? I forget) mm bolts you will see that the heat and vibration will have cracked the metal. Then the vibration of the engine will allow a resonance.

I have found that the silver metal hose can also rattle in it's clips.

If you are actually racing the car, you don't need the ducting and hose!



Cheers

 

There is also another one on the downpipe.The pipe after the manifold.