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Thread: dump valve blanking plate

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    Default dump valve blanking plate

    probaly a stupid question but was reading a post about checking blanking plate if lose just wondering where is the blanking plate located,had a forge one on mine and the spring snapped got new lower spring and dump valve was never loud again so put a bailys one on it,also put a tempory boost gauge under bonnet i put the t-piece where the dump valve vacum pipe goes to,and the boost gauge needle was going the oppisite way what have i done wrong,cheers all great website,ps forge are good i rang them and told them about the spring snapping and mentioned a stronger spring,they sent both for free,

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    cheers for replys

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    Regular Member ianjofriel's Avatar
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    why would you want a blanking plate on the dump valve ? fair enough, some people put blanking plates on the EGR valve.. but i'm sure i've not heard of one on the dump valve, as they are designed to relieve pressure on the turbo when you come off the throttle, a, to stop is spooling down due to the pressure change, and b, to preserve the life of the turbo ( see point A )

    also.. maybe if you gave some more details about your car it might be a bit easier to understand exactly what your going on about...

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    sorry i have a dump valve on my vectra 2.0t and was wondering where theblanking plate from forge goes for the old standard rec dump valve is cos on another post a lose blanking plate can snap the lower spring in your dump valve,and my lower spring snapped a few months ago and just curious where thr forge blanking plate is located

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    Regular Member icetrix's Avatar
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    its the side of the turbo, u will need to take the air intake pipe from the airbox - turbo to get at it


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    thanks mate

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    Regular Member rickyroo's Avatar
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    You will know if the blanking plate is loose, as you would loose pressure within the turbo as the charge air is getting lost before the intercooler, tbh you would hear it plus your actuator after a while would go weak and the cars d/c solenoid overboost and under boost would detect a fault and put an electronics fault sign in the dash or an exhaust emissions light up as obviously your fuel/air mixture would be incorrect.
    The bottom spring will go upon your d/v if you are loosing pressure or overboosting, i have the yellow spring fitted from forge as the green one is rated to 14psi but tbh ditches to many times and doesn't clamp under full load which would make the bottom spring stressed.
    Easiest way to find leaks is check your hoses for oil upon the outside as the charged air system carrys oil and you will find any leaks easy.
    1st place id look is the hose connecting the turbo to the charge air down pipe as this is the rubbishest pipe in the world and doesn't fit properly, and then the area around the d/v

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    cheers mate checked blanking plate its tight,can the bottom spring go of wear,have a bailys one on it now,the dump valve does go of at quite low revs but the turbo is in quite early,got bigger problems now,i did notice a slight bit of oil coming from one pipe the pipe is ****ty cause its been cut for dump valve cheersfor the replys mate

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