98 continental replaced cooling system still over heating no heat till it makes a rattling noise from behind the dash then throws heat can't see where coolant is leaking

It sounds like your AC compressor is going bad. Most vehicles also turn on the AC when in defrost mode, since the AC also acts as a dehumidifier.

IF NOT TRY SWAY BAR BUSHINGS

the radiator needs flushed you can buy it at the parts store you drain the radiator add the flush to it and however much water it calls for start the vehicle and run it till it warms up for however long the flush calls for then drain it again and add coolant i hope this helps you

Could be a leaf or piece of debris which could work itself loose

Its located on the turn signal lever on the steering column.

NO, trans cooler is not part of the heating and air system.

YOU MAY HAVE A AIR BUBBLE IN YOUR SYSTEM. NO MATTER HOW HOT THE CAR GETS IT WON'T PUSH HEAT THROUGH THE AIR BUBBLE. LOOK FOR THE HIGHEST POINT IN YOUR COOLING SYSTEM. I SUSPECT A HEATER HOSE. YOU HAVE TO GET THE AIR OUT OF IT.

One of the heat transfer "fins" sounds like it has seperated from the tubes allowing it to rattle on you. Its a heat transfer deal that may cause a tink tink kind of sound as the heat makes it expand and cooling by way of air passing by it. You could replace it, or try to hold each fin and bend whatever one is making the noise.

Subaru's are notorious for having exhaust rattles from the heat shields on the catalytic converter.

Does the noise go away or lessen when the engine gets hot? I know it seems unrelated, but on my 2002 Impreza it made a lower groan sound at first when ever I would shift gears as the engine speed (RPM) dropped. I put up with it for a year then finally I got a stainless steel hose clamp from the hardware store and put it around the heat shield.

Truly I should just get a new catalytic converter, they are around $200, but the hose clamp stopped the noise.

This might not have anything to do with it your noise. It is a cheap and easy fix though.

Good Luck

there should be only one fan and its under the hood on the passenger side firewall. it takes about 30 minutes to change and its the only motor you will see of that side,its held in by three screws and a plug.