View single post by Jon Plowe
 Posted: 08-08-2006 11:34 am
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Jon Plowe


Joined: 10-10-2005
Location: United Kingdom
Posts: 35

I had loud expensive sounding metalic tapping noise noise under the bonnet that I initially put down to imminent engine demise. Upon closer examination it was a faulty non return valve that sits on top of the servo and connects with the hose linked to the manifold. I had forgotten that I had just replaced this valve with a new one while the car was off the road for a couple of weeks. The symptoms  on the pedal were a slight rythmic pulsing with the engine running and the pedal pressed down. Changed the valve and cured problem. As Mark says servos when faulty can chuck up some strange symptoms. I don't think you will ever be thrown through the windscreen by the power of even good JH brakes!