kosman

my car has got a dodgy headgasket anyway the car was choking up at 3.5k and 4.5k,my mate werent convinced it was head gasket so we disconnectined the dump valve and the car ran perfect,the valve seems to be staying open when the engine just ticking over is this right? also if i take the dumpvalve off will it do any damage to turbo?

MannheimAlex

DV open on idle is OK

kosman

hmm right can it still be broke then? cos the car was choking up on boost with it connected and disconnected it was fine,my mate reckons the dump valve could be staying open and causing a air leak?

then with it disconnected it was shut but the car felt slighty slower,presumed it was cos we only nipped the dump valve pipe up so could have been leaking slighlty and causing it to feel slower?

MannheimAlex

whith the vac pipe disconnected it will leak, cos the sprig alone in the DV isnt strong enough to keep it close on boost.

what kind of DV is it?

kosman

its a bailey dump valve,it was a decent one but the car been sat 6months so could it have seized on so to say?

jaiscossie

Take it off and plug the vac pipe up, will be fine without it and dump valves are for homos and you aint a homo are you Kosman

MannheimAlex

maybe, would give it a good clean, but I dont think it`s the DV that causes those problems.

it seems that the lesser boost, caused by the leaking disconnectd DV cured that problem.

v man

dump valves are for gays and the confused

with all the buming you do you may well be one off the list

fuck it all of and carry on driving it
if it is the hg then you will soon know
or just replace the said hg and get some piece of mind

Glenn_

iTrader: (1)

Have you not done the head gasket yet kosman??

kosman

not done gasket yet cos funds arent allowing but it really isnt that bad,no obvious signs that it gone thats why we investgated the car choking up,ill pull it off or put a new one on it at weekend cos it runs fine without it just cant understand why its lost power.
another thing thats confucing me is it ran perfect before it was parked up so why would the dumpvalve just fuck up?

v man

it might feel down on power due to the turbo will stop spining with out the dump valve so you will have to wait for the boost to build back up

with the gay valve the turbo keeps it rpm so will feel different

the turbo loosing its rpm id down to the compressed air hitting the tb and bouncing back till it get to the turbo causing it to stall

i may be wrong as ive not seen the car before your problems or after but has happened to me before going from gay valve to no gay valve

R5FORD

iTrader: (1)

a loss of boost could be that the valve is sticking open.. im down on boost as the car dosent like to pull away from a standstill so going to discont my valve tomorrow and try that

martysmartie

iTrader: (1)

The diaphragms can go in the D/V and cause problems, on a cold start so ISCV open on mine you can hear air being sucked through the D/V so is normal.

As to the damage, yes it will but you will get so many opinions! If you actually understand what a Dump valves purpose is then you can understand why it's so important, it basically "Dumps" excess boost when the throttle is closed (Hence the name), without it it will find another path out, the only other place being via the turbo, you then get compressor stall, this makes a noise known as "Turbo chatter", the noise is caused by the boost being forced back through the turbo the opposite way to what it's spinning and stalling it in the process, the DV also aids performance as the tubo isn't constantly stalling and having to spool up all the time!

Ford did not fit a D/V to the car for no good reason, if you don't like the noise then fit a recirc like standard.

Martin

kosman

nice one for your answers lads,im going to put a new one on it i know it sounds gay but i like it

i have heard loads story of damage thats why i wanted a answer on that but ill stick with putting a new one on it

MannheimAlex

you said it is a bailey DV, so it should be a piston type. No diaphragm that can split.

As to the question DV yes or no, martysmartie explained it very well!

gtinutter

i would spend the money you going to on ya dv and d the head gasket instead of wasting cash pal

mechanic28

iTrader: (5)

so she clears herself after 3.5krpm then plays up again at 4.5krpm,or she plays up all the way after 3.5?4.5k?why do u think yoiu have a problem with ya headgasket?what boost?spec is she running?

martysmartie

iTrader: (1)

Sorry yes you woulden't have a diaphragm with your D/V.

Martin

kidsRS

iTrader: (6)

Tell that nick shitwell to sort it, or else im gonna come up n slap his fat head!

Paul_RS

iTrader: (4)

Your dumpvalve isn't tee'd into your fuel reg vacuum line is it?

kosman

hmm funny you say that ill check tomorrow

kosman

nah sick of this car now im just gunna dump it back in garage till i stop getting mard on

its sorted me howd,put another dump valve on it,seems to be ok at minute.