Took my car to a dealer today and after a $89 diagnostic fee they said there was "no compression in cylinder 4." They want $1330 to pull the head off and investigate whats wrong, this does not include repair costs. Anyone have any alternate suggestions of what i can do to figure out whats wrong?? Anyone had similiar problems like this?

 

If it is confirmed that you have a bad cylinder, then it is rebuilt time.
Better to just get another shortblock and go from there.

 

what if its just a bent pushrod or valve?

 

Then do a leakdown test to confirm.

But in general a bent valve will leak but no show 0 compression.

 

btw..the engine has 45k miles on it

 

one more thing, it threw a code of P0300 with is a RANDOM misfire, if cylinder 4 has no compression and is constantly misfiring wouldn't it throw a code of p0304, where the 04 is means cylinder 4?