water blows out of radiator

[staldark]

when i place water in the radiatro it seems like there is compression blowing water out. there is a little water evidence on the dip stick. what could this be

[caddydaddy]

Is this with the radiator cap off and up to temperature? If so, that's what happens.
Or does it blow water out through the coolant overflow tank? If that's the case, it could be a blown head gasket.

[staldark]

yes its when the cap is off

[caddydaddy]

Originally Posted by staldark

yes its when the cap is off

If this only occurs when the radiator cap is off, then that's normal. Does your car have any other cooling problems, like overheating?
When the cap is off, the coolant gets warm, and expands. Normally it goes into the resevoir, but if you have the radiator cap off, it goes out through there.

[caddyshackman]

what year is the car

[MagicRat]

Originally Posted by caddyshackman

what year is the car

A 1987 DeVille is listed on this members profile.

These 4.1 aluminum V8 engines were known to blow head gaskets. IMO it's almost certainly a blown HG, especially with the oil contamination.