Checking for Cracks

The attendees at the 2009 Torque Converter Rebuilders Association (TCRA) Seminar in Tennessee were introduced to a couple of interesting methods of checking torque converter covers for cracks.

Ken Kelly, from Trans Specialties in Aston, PA, talked about one conventional method during the round table discussion at the seminar. His method also appeared as a Tech Tip in the July 2009 edition of the TCRA Newsletter. Ken’s method is called Dye Penetrant Inspection or Liquid Penetrant Inspection. Materials needed to conduct this test can be purchased as a 3 part kit from your local welding supplier for under $20.00. The kit consists of a cleaner, a penetrant, and a developer. The cleaner is used to insure a clean, dry, contaminate free surface that is necessary for good results. After cleaning, the penetrant is applied to the surface of the part being tested (Figure 1). After allowing the penetrant 15 to 30 minutes to soak into all the crevices of the part, the excess penetrant can be removed by wiping with a lint free cloth which has been lightly soaked with a cleaning solvent. The last step in the process is to apply the developer to the surface of the part. The developer will highlight any areas that the penetrant was able to get into (Figure 2). Allow the developer about 10 minutes for its blotting action to work fully. A visual inspection will now reveal any cracks or defects in the part.

To read the rest of this Technical Article on the Sonnax Website click here.

Article No.: TCTIP-01-10
Author: Ed Lee
Total Pages: 2

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