I'm looking to remove the after market dump valve from the Calibra Tubro to see what kind of a difference it makes. Its spliced into a large black pipe that I believe leads from the intercooler and has a thinner pipe leading from the back of the dumpe valve round the back of the inlet manifold and under the black plastic 'turbo' shield.
Can I remove it from the pipe and join the two pieces of pipe together (you can see it was cut to fit the valve as the two halves match up) using some rigid platic pipe inserted between them and held with jubilee clips?
How exactly does the dump valve work?
Does the car normally come with one and would it of been removed?
Cem - if you're interested I am selling some blue SAMCO hosing for the turbo which is all brand new and includes the hose thats been cut (intercooler to throttle body) as well as the 2 bottom 90 degree pipes from turbo to metal pipe and metal pipe to intercooler.
All brand new and never used. Was meant to go on my car but dont need it now I have the front intercooler.
Cool guys, I thought this was the case but I needed confirmation incase I turned the engine over and blew it up or something. I'm told the after market ones arn't even as efficent as the standard ones you just get the 'Tsh' noise.
Its a very generous offer Richie but I'm getting a new intercooler for the front too so would that mean I need new hoses anyway?
If it's a baileys dump valve (maybe others too) you'll need to undo the end cover of the turbo, where the missing small vaccum pipe goes and take out a small metal ring and the sealer that goes in to block off the normal wastegate.
Undo the four allen key bolts, pull the end of and the metal ring is held in there with sealant, remove the ring and all of the sealant and fit the cover and replumb the pipe in, I've not actually removed one of these but did the reverse when fitting my Dump Valve.
Cool, I'm going to leave work in an hour to go home and do it, then see what kind of a difference it made.
1. Take out the old dump valve
2. Fix the 2 ends of the intercooler to inlet manifold pipe back together
3. Open the end of the turbo where the small hole is for the pipe. Take out blocking disc and sealent if present.
4. Replace end and fit small pipe.
5. Drive car.
Let me get this right. When fitting an aftermarket dump valve you must seal off / block the standard RECIRCULATING valve. This is done by unscrewing the 4 bolts from the recirculating valve and placing a ring + sealent to hold it shut.
What happens if this is not done? Surely it will not make any difference as there will be no vacum acting from the inlet manifold "T" piece area to open it.
... i think the pipe from the standard wastegate can go into the t-piece that your dump valve is presently going into...
You mean the pipe from the standard recirculating valve right?
If you look at the above diagram, the pipe that goes to the side of the turbo is removed and blocked off, I connected by pipe from DV to where that pipe goes into the t-piece by the inlet manifold. Not sure how it all works.
You DONT need to remove the pipe and block off the space unless you want to give yourself some extra work and make it hard to go back to standard.
Just follow the pipe up from the turbo to where it joins the T Piece and take this end off. Insert a long bolt with a big head (so it dont go down pipe) and then jubilee clip in place. Tuck this away like the 4x4 breaher hose.
Attach new DV pipe to where you took the old one off at T Piece and you're done.
If you need to go back to standard then you can just take the bolt off and stick the pipe on.