Hello and thanks again. I realize that many people ask questions on here. I know that it is easy to provide me with threads that have a broad base of information. I have spent hours reading threads and links in threads. But, I have a more specific question. Why am I getting a reading of 15 degrees before TDC? I would logically think that all chain stretch leads to 5 - 15 degrees AFTER TDC. Please save me some time. Thanks again, Kev

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1985 W126 300sd