Great test J Tab! What comes to mind immediately is the TEFLON receding / shrinking and not recovering due to loss of material (out-gassing) due to heat. When the Teflon cools, it does not recover. More questionS:
- Is the quality of the washers inconsistent (would explain low vs. high maintenance engine to engine)
- Is the material used consistent in it's constituent
- Are all washers supplied - actually Teflon or has there been a substitution we are not aware of.
Has anyone noticed replacement units looking of feeling different?
How about replacements that were inferior after install or worked perfectly - after install?