Discobryan Posted December 15, 2014 Posted December 15, 2014 So I got myself a van, pretty solid, run well, high miles but that's to be expected really overall in good shape However I started having problems with the brakes..... What's happening? Well The brake pedal goes solid, like there is a lot of pressure ( something like if you pump the pedal when it's not running and it goes hard), and the brakes won't work without really having to shove the pedal down.When this happens there is also a hell of a grinding noise, brakes work again with a good shove, but this can go on for about 5 mins before going back to normal. This has started to affect the other pedals too, as now they vibrate when setting off in 1st & 2nd, all the pedals vibrate at a certain point and there is a sort of grinding spinning noise coming from where I think the servo is behind the dashUsually only happens when vans been parked up for a few days as it's realy only used at weekends for my mobile discoIt's a pretty serious problem, and I could really use some help diagnosing! Been advised it could be the servo, servo seals, slave cylinder or the Fkn and pump, it's a strange problem! And any help would be greatly appreciated! Van is a 2005 relay MWB high top, 2.0l hdi engine with most of the service history an good mots, got van in November with a years test got 180.000 ish on the clock. Any ideas?? Apart from scrap it..... Can't really afford that!Thanks! Quote
paul.h Posted December 15, 2014 Posted December 15, 2014 Welcome to the forum. Possibilities could include the servo, the hose to the servo, the vacuum pump (leaking/broken drive lug), a non return valve on the servo hose where it connects to the servo, seized brakes needing a clean, a brake hose problem, the cross shaft from the brake pedal to the servo seized bearings - if there is one. The servo you can check to see if the pedal is pumped so it goes hard and then if it goes soft/further down when the engine is started. The servo seals/non return valve might be checked since it ought to maintain vacuum in the servo after the engine is stopped, so if the pedal is used some time after stopping the engine it takes a few pushes for the pedal to go hard. The vacuum pump should not be noisy or have any signs of oil leakage - listen to it when the noise appears. It is located on the gearbox end of the cylinder head. Quote
Discobryan Posted January 3, 2015 Author Posted January 3, 2015 Ok I have up as it was getting pretty bad Turned out it was the cv joint... Got it changed out and voila, I have brakes again :) Quote
paul.h Posted January 10, 2015 Posted January 10, 2015 Thanks for getting back to us. A cv joint could explain the noise and vibrations, but not sure how it was affecting the brakes. Quote
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