GMW GMW3149 PDF

Note: Nothing in this standard supersedes applicable laws and regulations.

Note: In the event of conflict between the English and domestic language, the English language shall take precedence.

Purpose. This test procedure is used to determine the sealing integrity of Powertrain sealing systems intended to contain oil, coolant, and air. It is mainly used as a quick test during the initial development and validation of a subassembly.

Foreword.

Supplier Introduction: This test is a required General Motors Powertrain (GMPT) test for any design or process change made to all Powertrain sealing systems. It is to be run according to the following procedure. The required test pressure and the maximum allowable leak rate will be specified by the GMPT development, validation, or release engineer who is responsible for the part being tested.

Applicability.

This test procedure is suited to the evaluation of all Powertrain sealing systems using a test pressure up to 700 kPa (100 psi).

This test procedure can be used with water/soap mixture or a water tank to determine the location of a leak, as well as with a mass air flow meter to quantify the actual leak rate.

This test is often used with other sealing test procedures, like GMW3152TP (Static Sealing Pressure Measurement for Powertrain Sealing Systems) or GMW3155TP (Thermal Cycling Test for Life Assessment of Powertrain Sealing Systems), as a check of seal integrity.