I did something not that dissimilar with a foreign object and a cambelt a long time ago. I lost the oil pressure on my Chevette HS and being young and gung ho,I dived in and completely stripped the engine and then commenced on a full rebuild,which ended up taking severl months,mostly due to VX dealer constantly ordering in the wrong parts,and partly due to the fact I had never rebuilt an engine in my life.
Eventually,just before Christmas I got it all back together and running nicely,apart from a not too serious leak from the rad.
Swmbo was eager to get taken to a supermarket 10 miles away to do Christmas shopping,so of we went. On the way back the engine started to get pretty hot,so worried about the very expensive alloy head (over £1000 30 years ago !) I pulled into a layby to let it cool down a bit and then add coolant.
I got a bit impatient and decided to take the rad cap off to help it cool down quicker.The cap shot up,hit the underside of the bonnet and came back down and jammed between the cam pulleys,instanly slicing through the brand new cambelt.
I left the car where it was all over Christmas,which wasnt the happiest,due to self disgust and also worry about the car.
Towed it back home and took the head off again.Two new inlet valves and a new cambelt required,and all was well.
