engine backfiring after redoing heads maybe some type of cam timing error

i just redid the heads and when i turn it over it backfires and the accessory water holder backs up out the release tube. what or where do i have the timing off on the cam or in the piston order?

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What is an accessory water holder? Why did you redo the heads? And most of all what in the heck are you working on? And if you say a car your really in trouble.
Glenn Beasley Chrysler Tech
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Assuming Mopar gasoline engine of some sort.
If cranking the motor is causing the radiator overflow tank level to change, you have more serious problems than cam timing! From best to worst case:
1. Hopefully you have the wrong head gasket(s).
2. If it is a V engine, possibly the heads are not symmetrical and you have them switched.
3. Worst case is the cam timing was off so badly that a piston came up and wedged against an open valve and cracked the head or cylinder wall.
I think the answer is #3 and you're screwed. Gyz

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Assuming Mopar gasoline engine of some sort.
If cranking the motor is causing the radiator overflow tank level to change, you have more serious problems than cam timing! From best to worst case:
1. Hopefully you have the wrong head gasket(s).
2. If it is a V engine, possibly the heads are not symmetrical and you have them switched.
3. Worst case is the cam timing was off so badly that a piston came up and wedged against an open valve and cracked the head or cylinder wall.
I think the answer is #3 and you're screwed. Gyz

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