Hey guys, today I did a boost leak check on my evo 9 and I took off the coupler coming off of the turbo outlet and placed a cap with a valvestem. So I'm pressurizing from the LICP. So I pressurized to about 15psi and it seems that there is a leak but I cannont hear or find out where. It takes about a minute to go to 0 psi. As soon as I stop pressurizing it starts to leak. I have searched but the threads I saw pretty much pointed to where an obvious leak was (by sound) I have tighten up everything I can for now but like I said I cannot hear any leaks. Has anyone had this problem before? While driving I can boost to 23psi in fifth and it would hold but taper a bit to about 21psi or so i can really tell because I try to keep my eyes on the road.

 

trying smoking it!!

 

what do you mean?

 

did you pinch off your crankcase breather hose coming of the valvecover? that will usually leak some blow-by through it when pressurizing. also, use a spray bottle with soapy water in it and spray it on suspect areas. it will bubble from the leak if one is present.
why did you pressurize from the licp? usually it's done from the turbo inlet where the intake connects to it. then you can check all the pressurized piping in the system. doing it your way, you'll never know if your leaking from the licp area, ya know?

 

thanks for the info. I am pressurizing the LICP i disconnected the coupler from the turbo outlet which connects to the LICP and put my leak checker there so I'm pretty much acting like the turbo when applying pressure. I'm pretty much checking LICP intercooler, UICP, TB and intake manifold.

 

yeah, but then you'll never know if your leaking from the turbo to licp connection other than visually, ya know what i mean?

 

gotcha