300C Whistles When Accelerating

[Eightpint]

Guys,

 

Can anyone point in the right direction of where to start looking.

 

Recently I have acquired a whistle sound every time I put my foot down or accelerate hard as the car goes through its auto gears, I don't seem to be lacking any power and theirs nothing flagging up on the dash to say I have a problem but the sound is annoying.

 

Any advise would be appreciated.

[Briscoe76]

Does the whistle happen only happen under throttle? It sounds like it could be a split in one of the turbo hoses. I had a similar thing happen to my diesel Vectra a few years back. After a while the car started to smoke badly as the split got bigger.

[Eightpint]

Hi briscoe,

 

Yes it seems to whistle only when I accelerate, which hoses are you referring to, the plastic pipes on top of the engine?

[Briscoe76]

Have a quick check here. It could be the seal leaking.

 

http://www.chrysler300c.org.uk/catalogue/pops/th8.html

[Eightpint]

Hi Briscoe

 

I have checked the top pipe like in the picture you sent and replaced the seal as matter of course, but I still have this annoying whistle when accelerating. So any ideas where I look next cheers.

 

Sean

[Briscoe76]

Hi Briscoe

 

I have checked the top pipe like in the picture you sent and replaced the seal as matter of course, but I still have this annoying whistle when accelerating. So any ideas where I look next cheers.

 

Sean

 

HI Sean.

 

I know theres some rubber intercooler pipes as well that run down the front of the engine to the intercooler, plus the metal one that exits the turbo (see photo) It might be worth checking these, as the metal one especially has a habit of leaking air.

[Eightpint]

HI Sean.

 

I know theres some rubber intercooler pipes as well that run down the front of the engine to the intercooler, plus the metal one that exits the turbo (see photo) It might be worth checking these, as the metal one especially has a habit of leaking air.

hi Briscoe,

 

i have done what you said and removed the metal pipe from the turbo which goes to the resonator box and found a light green o-ring at the turbo end which seemed to be in good nick.

as i looked at the other end that fits onto the resonator box i had only three quarters of a black o-ring (hensce air escape i assume).

so the next question is where can i get these 2 o-rings from and is the green/black combo o-rings correct for this pipe.

 

at the moment i made a rubber seal to replace the black broken one to keep the car on the road and to my surprise the whistle has gone away, so i am chuffed with myself but would prefer to get the proper ones fitted if i can find them,

again thankyou very much for yor advice on this matter

[Briscoe76]

I’m well chuffed that has helped. I’m no mechanic at all, but glad you got it sorted mate.

[Eightpint]

I have managed to get the 2 proper o-rings from of all places a Mercedes dealership for the turbo metal pipe. I ordered a spare set aswell for a total of £20 which seems a bargain. As my home-made rubber is working great i havent bothered fitting them yet..

[Briscoe76]

That is a bargain. Especially for genuine MB parts. I’ve had a few spares from MB for mine. The oil cooler seals. Only a tenner. I’d be inclined to leave your handywork in place until it starts whistling again!