Hey bud ive got an 96 thunderbird 4.6 auto and im trying to put a heater core in it but im an ase certified mechanic but ive never done a thunderbird before and i cant even see how to remove the cover and the book doesnt show anything can you help?
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You most likely have an "AIR LOCK" within the Heater Core. This requires one to pressurize the Cooling System and loosen the heater hose at the HIGHEST POINT and bleed the Air out of the Heater Core. I am not familiar with the Nissan but have encountered this problem numerous times over the years. Most late model vehicles are equipped with Air Bleed devices which must be utilized any time coolant is drained and refilled.
Most all reputable Auto Parts stores sell and/or rent a pump that temporarily replaces the Pressure Cap that may be utilized to pressurize the system for this purpose. If you don't feel capable of performing the bleeding operation take your vehicle to an ASE Certified Mechanic and have it done correctly.
Removed the center console to get to the panel that holds the heater core.the heater core is in the center of the car under
the radio. There are 7 screws holding the cover on. Once you remove the
7 screws, there are two straps that hold the core in the heater box (2 screws per strap. Some cars are easier to get the heater
hoses from underneath after jacking up the car, some you can get to
from up top under the hood behind the engine. It's not a 15 minute job,
but not difficult at all. I usually suggest pulling out the passenger
side seat to give a comfy place to lay while doing it. the seat comes
out with only four bolts, and you won't have to contort your self to
get the heater core out. Your low coolant light is due to air trapped in
the system. Anytime you open the cooling system on a 3.1, you have to
bleed the air out using the bleed valves on the t-stat housing and
transfer tube (some only have one on the t-stat housing. If you have a 5 speed, your going to remove the shifter
knob and just yank on the plastic that had the boot. (it only has snaps
that hold it on) Then there are 2 bolt holes in the armrest
compartment. and 4 more which are under the boot and plastic. Very easy
to take off and put on.
Had similar problem on my 2000 cabrio---hit the dashboard
lightly above the temp gauge and it dropped to normal reading---the temp gauge spring was oversprung from the
previous overheat problem I had---as long as the engine is cool --then so are you
You will have to remove the entire dash assembly and then remove the air conditioning/heater case and this will enable you to have access replace the heater core, this is a really tough job did it 3 or 4 times while working at a Ford dealer, took 10 hours and I had allot of experience, unless you have allot of tech savvy I would pay someone to do it, I would, and I am a Professional mechanic.