auldy

Was out in the Sapph today and the car made a strange blow off noise instead of the usual and I lost all power from the turbo. There is a whine now and the boost gauge is still moving but no turbo boost at all? No smoke at all either?

Blown turbo? All hoses and pipes seem to be ok

Cheers,auld

KSA-Cossie

iTrader: (4)

Waste gate penny snapped off ?

auldy

Im new to this turbo carry on mate, where would I find that? Would it be a part to replace if it was that or a new wastegate?

Cheers

Jay,

iTrader: (4)

take the down pipe off and look in the back of the turbo and where the actuator pin goes through the turbo and fixed to that there should be a round disck that shuts the wastegate off until boost builds so either that disck has fell off or is spinning in the pin

auldy

Thanks for that info mate, that's tomorrow nights job sorted!

Will post up once ive had a look

cheers,auld

Jay,

iTrader: (4)

this is what it looks like if the arm is broke or removed from the actuator




And this is how it should tight against the body if everything is ok

auldy

Quality mate, thanks for that

Auld

auldy

Got a new actuator from MSD today, great service I must say!

That didn't solve the problem but I think the penny may be spinning and not seating properly. Can you buy a repair kit like a new penny bit and arm ect?

cheers,auld

scoooby slayer

iTrader: (4)

if the penny is there and closed even if its not totally sealed it will still make boost. have you pressure tested the entire boost circuit from the turbo inlet ?

auldy

How do you pressure test the circuit mate?

Cheers,auld

scoooby slayer

iTrader: (4)

I have a pic hang on ........

scoooby slayer

iTrader: (4)

this is how I do it








leave everything connected just remove your air filter and make a bung to fit in its place with an airline fitting and a gauge on it.

then just apply pressure if there is a leak of any size it simply wont hold pressure, you will find the leak easily as air will be blowing out from it.


if the car is map based it can leak all its pressure and it will still run perfect just no boost, but if you've got afms (air flow meters) It will choke up and eventually flood stall from being so rich ime.

auldy

Thanks for that mate, might give that a try over the weekend!

Cheers,auld

Oranoco

Do you have a dump valve? If so have you tried blanking it off?

Versus_Creations

iTrader: (1)

have you taken the air filter off and had a look at the compressor wheel. It could have had something go through it and destroy the wheel, which will make a whine and very little boost if any.