take the engine apart or get it repaired....
before it turns into this....

 

how long did it sit? I think my old one did the same thing from sitting 4 months with tap water in it. It had a blown seal but I never got around to rebuilding the engine. Now it wont start.

 

this engine was in the car when i got it... i bought the car on jan - and last owner said that the car sat for 3-4 weeks with a blown coolant seal...

when i got it, i tried starting it - but well, rear rotor was trashed, it would catch a little once in a while, but mostly not, so i sprayed it with wd40 and drained the whole coolant thingy... but i guess it was probabl too late.... rear rotor had no compression when i got it....