Over time we have seen numerous fixed in vehicle reports that have solenoid packs being changed for leaking. In response to that, three years ago we made a special test plate so our rebuilt solenoid blocks can be charged with compressed air, and then sprayed all over with a soapy water solution. Any air leakage would then show up as bubbles in the soap, and would expose the leak. Before that, we had an occasional one or two blocks that would leak on the dynos. Now that has gone away, and we don’t see that problem anymore.
