We decided to crack the passenger side valve cover and try to check the timing chain stretch. The best we could do was to set the cam on the 45 degree offset mark and read off of the harmonic balancer. Got 33 degrees, I calculate 12 degrees of stretch. Small bomb waiting to happen. Is this correct? will the angle read off the balancer go smaller or larger? Where are those marks for cam alignment at zero degrees.

Anybody help?

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1995 E320 -171k-km
1995 S420 -333k-km