[Christ]

90* off could definitely kill spark, as the ECU would see that the CKP and CPS aren't lined up and prevent the spark from occurring to prevent further engine damage.

If you want to check for bent/broken valves, get a fitting that screws into the spark plug hole, and blow each cylinder full of air up to 100 PSI. If the cylinder pressurizes (even if it doesn't hold the pressure very long) they're most likely OK.

A better test is to fill the cylinder with a light oil like 5w30 when it's only a few degrees from TDC and the valves are supposed to be closed (line the cams up so the valves are closed on the cylinder you're testing). Manually turn the crank against the pressure of the oil and check the intake and exhaust ports for oil seepage.

If you find any seepage, make sure the valves are closed and repeat the test if necessary. If the valves were closed and you get seepage, you have damaged valves.

The latter test will help you determine whether to just put a new timing kit on, or remove/rebuild the engine.

In either event, replace the WHOLE timing kit. While you're in there, if you've got the money, check out some adjustable cam gears.

If you need to replace the head, don't worry, just bolt on a head from a Caravan or PT Cruiser - they're the same casting, you just use the sensor and cams from your engine. If you wanted to use the 2.4's cams, you have to use the 2.4 sensor, IIRC, and something has to be changed, but I can't recall what it is.

If you flip the 2.0's cam gears over, they say "2.4 Liter Side" or something to that effect on them. They're the same parts. Isn't that nice of Chrysler? LOL.