Bypass hose for coolant
Many Caddys have/had small "radiators" for heat to the rear passengers located under the front seats. Most shops (or owners) never check them or know they exist.
SOURCE: location for adding freon
add freon to low pressure side . low pressure side is large line with small fitting. high pressure line has a large fitting.
SOURCE: 99 deville head gasket leak?
A head gasket leak is usually indicated (among other things) by continous overheating of the motor, and subsequent loss of coolant.
It can also be indicated by the presence of engine combustion gas bubbles in the coolant resevoir.
Ensure the coolant system has no external leaks, such as faulty hose/s, radiator etc.
Ensure motor tune or other motor mechanical condition is not the cause of overheating.
I assume the motor is actually running hot.
Check cooling fans are operating ok (as necessary when car warms up):- if not check
1) fuse,
2) relay operation,
3) heat sensor switch.
Check/replace the thermostat,
Check the coolant pressure cap is serviceable & of correct rating,
Ensure cooling system is correctly filled, bleed off any airlocks as necessary when re-filling,
Ensure radiator hose on suction side of waterpump is not collapsing at engine revs above idle (due softening),
If the motor has been severely overheated, the head gasket could be blown - look for combustion gas bubbles in the coolant resevoir.
Testimonial: "thx..my car is not overheating.only had to pull off road once.it does get to 233 sometime."
SOURCE: Where is the coolant temp sensor located on 02
on the intake manifold near the thermostat housing
Testimonial: "Thanks....I've been looking for answers to this everywhere...."
SOURCE: Flush radiator and cooling system on 1997 Calillac DeVille Concou
your radiator has a pecock on the bottom of it screw it out then you can run water through a hose behind it once it stops draining to get any residue out as far as the engine youll never truly get all of the old coolant out without tearing it down and putting it back together so flushing the radiator is just fine.
SOURCE: where is the ect(coolant) sensor
The engine coolant temp sensor is located just below the throttle body.Just remove the air cleaner tube and you should be able to see it.There will be a black and a yellow wire on the connector.Hope this helps.Good luck.
A
heater core transfers heat from a 1994 Ford Ranger's engine to the
passenger compartment by running hot radiator coolant through a
serpentine of tubing. Air blows past the hot fins of the heater core
and into the truck cab.
The hoses running to and from the
heater core must be removed from the engine compartment, but the
core itself is accessed from inside the passenger compartment, on
the driver's side next to the center console.
1. Turn off the
engine, open the hood and remove the battery cable from the negative
terminal. Make sure the engine is cool.
2.
Attach a 3/8-inch interior diameter hose to the drain outlet on the
bottom rear corner of the radiator on the driver's side, and place
the bottom end in a resealable plastic container. Turn the drain
valve (located above the drain outlet) counterclockwise with a pair
of pliers. Drain the engine coolant into the resealable container,
then close the valve by turning it clockwise. Remove the hose from
the outlet.
3.
Loosen the hose clamps on the radiator hoses where they attach to
the heater core on the firewall. Remove the hoses.
4.
Unscrew the screws holding the underdash cover in place on the
driver's side of the passenger compartment. Remove the underdash
cover.
5.
Unscrew the four screws on the cylindrical heater core access cover
and remove it. Remove the heater core by pulling it down and toward
the rear of the vehicle.
Replace the unit with a new heater core.
6.
Reinstall the heater core access cover and screw in the retaining
screws. Replace the underdash cover and screw it into place.
7.
Replace the radiator hoses on the heater core in the engine
compartment. Tighten the hose clamps. Add coolant until the level is
between the minimum and maximum marks on the reservoir.
8.
Replace the battery cable and start the engine. Check the system for
leaks.
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