G60 boost pressure check

From THE Corrado Forum Knowledge Base

A number of people have asked me how we check for boost leaks so i have written this to hopfully explain how we do it.

any questions please ask me (Darren of G-Werks - g-man on the forum).

Boost checking

Remove throttle body linkage on the underside of throttle body (to remove this use a large flat bladed screwdriver and prise of the plastic ball joint on the boost return linkage carefully).

Start engine and allow to idle.

Mix up a thick concentrate of washing up liquid/water or use a leak dector spray.

In 2 second bursts, manually close the boost return flap by closing the linkage via the end you have just removed.

Whilst closing the boost return flap you will see that the system pressurises. Use you choice of leak detector around all joints in the pipework etc & check for bubbling.

Note: IT IS VERY IMPORTANT THAT YOU HOLD THE SYSTEM CLOSED FOR NO LONGER THAN 2 SECONDS.

Also to check the joints around the standard corrado intercooler you will need 2 people ie yourself controlling the boost return linkage and another pair of eyes checking for leaks.

I quite often see the hoses expand very slightly when backing up the systems for leak testing - even the plastic ones. It's only very slightly, but it is visible