Engine Noise Help

[Breitz6989]

My 2f recently started making a noise when I'm holding the brake down or braking to stop. Not the noise of bad brakes it's coming from the engine like a fan rubbing or a fan winding at high rpm. Anyone have an idea what this might be. Doesn't occur when I let go of the break, also doesn't occur when I push or release clutch. Thanks for any help.

Engine Noise

• Breitz6989
• Jun 7, 2016

 

[Output Shaft]

So when you press on the brake at idle it makes that noise.... Then when you let off the brake the noise goes away?

Connect a vacuum gauge to the engine while the brake is applied & released to rule out that it's not a weird sounding vacuum leak in the booster.

 

[Jesper]

Hard to say with all that's lost in the transition from real life to computer speakers, but maybe sounds like a whine/whistle, maybe a leak somewhere - EGR tube, intake or something, although your idle seems pretty steady, hmmmm. Pulley bearing??

 

[Kleatus]

Just take the brake booster vacuum hose off while it's running and hold your thumb over the end to block it off. If the noise stops it is likely a leaky booster like output shaft suggests.