B20 bomb

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545KB, 2432x1382px

Alright I'm just looking to see if anyone has any idea of what could've caused this. I recently just bought a jdm b20b and installed it into my car after refreshing it (new seals,timing belt,water pump,tensioner) with one thing to add before I removed the original timing belt. It wasnt perfectly in time tdc, and while I was trying to adjust the intake cam it was giving me a lot of trouble. . But I got it in time and tensioned properly. And I've replaced timing belts on these cars plenty of times before so I know it was correct. Anyways i installed it into the car yesterday. Started first try and it idled relatively ok. It was running rich most likely because of a bad primary 02 but that shouldn't have caused this issue. The problem yesterday was if I revved slowly it would react accordingly but if I quickly revved it or wot it would hesitate and then rev up, like it was choking. I checked all the vacuum lines and sensors, everything seemed ok. Then when I went to start it this afternoon the motor wouldn't crank. It just made a grinding noise.. pulled off the valve cover and found the timing belt half off the cam gears. And the intake cam basically seized. Manually rotating the crank only spun the exhaust cam and the timing belt would jump the intake. I also noticed the cam journals in a few spots were scarred up pretty good. If anyone has any idea what caused this help would be appreciated.