Boost Leak Test
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Boost Leak Test
Not sure if this is in the right section but done a boost leak test today only pressurised it to about 8 psi but there is a audible hissing noise from the throttle body is this normal or does it mean that my throttle body shaft seals need replacing?
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Works or machV sells these seals or you can always get the SKF 3930 seal.
Also if you want to know for sure do the leak test and grab the throttle lever and move it back and forth if the hissing changes tone then its def. the TB seals.......but I can tell you it is.
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Just ordered some from works I think its def the seals now as i did notice when doing the test that the sound would change when messing with the throttle.I know its always best to be leak free but has anyone actually seen boost pressure drop or noticed any other problems when there seals were leaking reason I ask is my car seems to hold boost just fine even though the seals are leaking.
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Just ordered some from works I think its def the seals now as i did notice when doing the test that the sound would change when messing with the throttle.I know its always best to be leak free but has anyone actually seen boost pressure drop or noticed any other problems when there seals were leaking reason I ask is my car seems to hold boost just fine even though the seals are leaking.
Thats the tell tale sign. The install isn't too tough. There is a good write up in the How-To forum.
A boost leak doesn't mean you will see a drop in psi, it just makes your turbo work harder to meet that PSI. It can easily take the stock turbo out of its efficiency range.