wastegate actuator
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1.0 BAR
Joined: Oct 2006
Posts: 229
wastegate actuator
Iv had some weird problems with my wastegate actuator. I have a 14b turbo on a d15b7. When i first put it on everything was fine ran 8 psi solid. Then it started to only do like 5 psi then all the way down to 2 psi. I figured something was wrong like boost leak. So i did a leak down test and the actuator was bleeding out air. it was leaking luckly i had another one. I put that one on and it ran 8 psi solid everything was fine for like another 2 months then i let it sit for like a week. I went and drive it and it was only going to 5 psi. I know that this is the corect from the boost gauge because there is no power at all, compared to the 8 psi. SO then i did leak down test nothing everything was fine. So i noticed it sounded alittle louder out of the dump tube, and i found out the wastegate flapper was not closing all the way. so i tried to put washers on the wasteactuator to pull it away farther from the turbo. It thighten it up and it closed the flap up good ran like 8 psi but the boost inst strong at all and the pressure is all fucked up it will spike to 10 psi then go to 5 psi then like 7psi and stay there till i shift. I was just wondering has anybody ever had to go through two wastegate actuators in less then a year and any ideas on why they keep messing up or do you think i just got two crappy ones. Thanks
3.0 BAR
Joined: Apr 2006
Posts: 3,015
Re: wastegate actuator
Originally Posted by si 1
Iv had some weird problems with my wastegate actuator. I have a 14b turbo on a d15b7. When i first put it on everything was fine ran 8 psi solid. Then it started to only do like 5 psi then all the way down to 2 psi. I figured something was wrong like boost leak. So i did a leak down test and the actuator was bleeding out air. it was leaking luckly i had another one. I put that one on and it ran 8 psi solid everything was fine for like another 2 months then i let it sit for like a week. I went and drive it and it was only going to 5 psi. I know that this is the corect from the boost gauge because there is no power at all, compared to the 8 psi. SO then i did leak down test nothing everything was fine. So i noticed it sounded alittle louder out of the dump tube, and i found out the wastegate flapper was not closing all the way. so i tried to put washers on the wasteactuator to pull it away farther from the turbo. It thighten it up and it closed the flap up good ran like 8 psi but the boost inst strong at all and the pressure is all fucked up it will spike to 10 psi then go to 5 psi then like 7psi and stay there till i shift. I was just wondering has anybody ever had to go through two wastegate actuators in less then a year and any ideas on why they keep messing up or do you think i just got two crappy ones. Thanks
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Posts: n/a
Re: wastegate actuator
An easier solution you may want to try:
Hook up a spring to your wastegate flapper. Don't get a very stiff one or you will raise the boost more than you want, but get one that will apply just a little bit of pressure to hold the flapper shut when it needs to be.
Hook up a spring to your wastegate flapper. Don't get a very stiff one or you will raise the boost more than you want, but get one that will apply just a little bit of pressure to hold the flapper shut when it needs to be.
0.0 BAR
Joined: Apr 2004
Posts: 0
Re: wastegate actuator
I've had the same EXACT problem. Personally, I have tried the spring idea which was great in a pinch, but spool was definitly affected.
Put some washers between the actuator and housing, effectively putting tension on the flapper. Should do the trick
Put some washers between the actuator and housing, effectively putting tension on the flapper. Should do the trick
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