Originally Posted by TheOtherDave™

Off the top of my head, the B18A1 should be timed at 10° BTDC, but check that against the Chilton manual.
What worries me most is the sound coming from your timing belt.

With all due respect, stop messing around and replace the timing belt, the tensioner and the water pump ASAP.
If the belt fails, valves and pistons will collide with wallet-flattening consequences.