Correct adapter for 2003 Turbo?

Can anyone confirm what is the correct adapter for the coolant tank, for pressure testing? Thank you,

There are of course dozens out there from Matco, Stant, MityVac and others.

Many Thanks,

 

Can't help you with an adapter recommendation.

I have found a hot pressure test is a pretty good test.

This can expose leaks that a cold static pressure test will not expose.

Easy to perform. Be sure the coolant tank is topped up but not too full. Be sure the cap is clean and where it screws to the tank clean and the cap is screwed down all the way. It can more force to properly secure the cap than one might think, but of course don't gorilla the thing either.

With the A/C off start the engine and then drive the car around the neighborhood/town until the engine is fully up to temperature.

Ideally you would want to hear the radiator fans come on.

Back at your driveway raise RPMs a bit and hold until the radiator fans do come on. Let RPMs fall to idle a moment then shut off the engine.

Wait. The heat load of the engine will raise the temperature of the coolant and its pressure. Because everything is hot and more pliable (I'm thinking hoses and the tank at least) if there is a leak it will make itself known.

The above was used with my Boxster and found a leaking coolant tank. The thing gushed hot coolant after a short wait after turning off the engine. I let the car cool down overnight then topped up the tank with around a gallon of distilled water then started the engine. The tank was once again water tight and I drove the car a couple of miles to the dealer for a new tank with the old tank still water tight all the way.

With my Turbo the tech did something similar to the above and showed me the radiators were leaking along their bottoms.

Have to mention with both cars I found the coolant cap leaking, under hot pressure, which over time would have the coolant tank level down low enough to turn on the low coolant warning light. Getting everything up to temperature then putting a tin foil tent over the cap after just a few minutes had water condensed on the underside of the foil cap confirmed there was a leak in that area. A new cap fixed the leak.