question

[FiendFX]

Yesterday, I used the snap on cooling system pressure tester on a lexus es300 to check for coolant leak. The system was holding pressure for 2 minute and gradually loss pressure down to 14 psi but I see no leak. Does that mean the tester is leaking or the car is leaking coolant somewhere? THanks

 

[LXCam]

Spray your connection points with soapy water.

 

[popparoach]

Yes.that's what that means.

 

[Rookie2]

Test the pressure tester on a known good vehicle.

 

[Ramblin Man]

You could also use your radiator cap adapter and test your pressure tester on a known good cap. Just stop applying pressure a couple pounds below caps rated pressure, let it stand a while and see what happens.

Good luck! Hope this helps.

 

[abvw]

No leaks in the engine bay or wet carpets in the cabin?

Head gasket.

 

[FiendFX]

No leaks in the engine bay or wet carpets in the cabin?

Head gasket.

I hope not!

 

[theoldwizard1]

Yesterday, I used the snap on cooling system pressure tester on a lexus es300 to check for coolant leak. The system was holding pressure for 2 minute and gradually loss pressure down to 14 psi ...

If it held at 14 psi, you don't have a problem !

 

[FiendFX]

If it held at 14 psi, you don't have a problem !

Should hold pressure for at least 5 minutes, but it did not. No visible leak. Only time will tell when it gets worse than it will be much prominent.