Turbo backpressure valve
Post Fiend
Joined: Jul 2005
Posts: 14,582
Likes: 12
From: 21791
It is on the outlet of the turbocharger, and it is basically a butterfly valve close to the turbine wheel. The valve is a circular disc that closes and has just one corner flat, to let about 5-10% of the exhaust through. This major restriction in the exhaust allows only some to escape, which keeps the heat in the engine, and helps it warm up faster. The sound you get is the same amount of exhaust flow passing through a very small orifice. Here is a picture of the valve in the open position, i will look for a closed one.
Elder User
Joined: Dec 2005
Posts: 703
Likes: 1
From: Middle of a field CT
It is on the exhaust side after the exhaust turbine and housing. It is nothing more than a flapper valve in the exhaust, When under the hood you will see a rod coming from the housing, this is the notoriuosly leaky acctuator rod.
Hope that helps
Hope that helps
Lol
