1999 Buick Regal Q&A
1999 Buick Regal Question: What are all the possible causes of a loss of coolant?
The coolant level drops slowly, but no coolant appears on the ground beneath the car. Radiator pressure test does not maintain pressure; and a mist appears to spray out of lower right (when viewed from rear) side of engine until pressure is released at the tool. Coolant in radiator is normal color. No codes or check engine light are displayed. - netbossefc
Lots of possibilities!! Have you had it checked while hoisted? May need an inspection mirror or video scope to pinpoint the leak, no way we can help beyond this! - pushrod
have cooling system pressure tested to determine source of leak - globalhelper
1998 Buick Regal 3.8L (Non Turbo) I just replaced the upper plastic Intake Manifold/Plenum section due to both flooding of the manifold internally and hydrolocking of flooded Cylinder #6. And after...