Knock from the front on braking

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soldave

Member
Joined
Mar 15, 2009
Messages
462
Location
Okinawa, Japan
Needing a bit of advice here about where to start looking for a little niggle I've found recently.

First off, I park my Evo III on a slight incline (very slight). Right that's about as much background information as you need I think! After the car's been parked (say, overnight) I'll start driving it, but when I come to brake for the first time and weight moves forward there is a knock that comes from the front (possibly both sides... tough to tell). When I accelerate again there's no other knocking noises and none more when I brake again. Until the engine and everything else is settled after being parked, and then it will do it once again.

I know it's more than likely a bush or 2 at the front is wearing or has worn out. But could anyone recommend a place to start looking from that godawful description I've given you?

In a perfect world I'd replace all the bushings with poly ones, but in a perfect world I'd also be able to afford to replace al the bushings with poly ones!
 
It is, but not always I don't think. I'll see if it happens if I just let off the gas and engine braking makes weight move forward.

I'm inclined to say it's not that, but then again I never really know what I'm doing.
 
is your car getting wet from reticulation? the water on the discs dries off but the pads stay wet longer and cause a rust spot.

before you drive away next time...just roll the car a few inches and look at the discs neat the caliper.
 
Slight leak in brake fluid perhaps causing the piston to move back in a tad and the floating caliper to back off slightly when sitting for a while. Then pressurise again when you push the pedal again.
Before you drive off next time in the morning, turn the car on, give the brake pedal a few good pumps, then drive off and see if it happens.
 

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