After more investigation, I'm not even sure the sound I'm hearing is chain rattle from a bad tensioner. Today I got underneath the car and put a stethoscope on the IMS/crank tensioner and had someone start the car when it was dead cold and I couldn't hear anything abnormal from the tensioner. I'll try the bank1-3 tensioner tommorrow. Could just be lifter/starter rattle.
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Current car
2000 Boxster 2.7l red/black
Previous cars
1973 Opel Manta
1969(?) Fiat 850 Convertible
1979 Lancia Beta Coupe
1981 Alfa Romeo GTV 6
1985 Alfa Romeo Graduate
1985 Porsche 944
1989 Porsche 944
1981 Triumph TR7
1989 (?) Alfa Romeo Milano
1993 Saab 9000
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