If the chain did in fact stay on the IP drive sprocket, you could have the IP out of sync. The cam turns twice for each revolution of the crank, so that means the crank will hit the TDC mark twice. Because of this, the IP can be 180 degrees off.

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RRGrassi


70's Southern Pacific #5608 Fairmont A-4 MOW car

13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete.

99 W210 E300 Turbo Diesel, chipped, DPF/Converter Delete. Still needs EGR Delete, 232K

90 Dodge D250 5.9 Cummins/5 speed. 400K

Gone and still missed...1982 w123 300D, 1991 w124 300D