I cant begin to describe how to replace your heaters core however you can buy a repair manual at most any autoparts store for your 1985 Chevy Cavalier by Haynes or Chiltons that normally explains this procedure. (At Your Own Risk) As for bypassing the heaters core that's simple disconnect the two hoses from the core and install a coupling between the two simply making a loop or take one hose off completely and take the other hose off the heater core and run it to where you took the other hose off the engine either way you will be making a loop from point A to point B of your engine not the heater core. EzForJesus
Detach the screw that attaches the heater duct on a Chevy Cavalier and remove the heater core. Once this is done you can replace the faulty heater core with a functional one.
replace anti-freeze, replace thermostat
no , the heater core provides heat to the interior for the passengers
To bypass the heater core you need to remove the two water hoses going through the firewall from the engine compartment to the heater core and connect them together so that the water loops around back to the engine.
Sounds like heater core is leaking, replace heater core or bypass
Take both heater hoses off at the heater and the hose running from the front, attach it to the rear of the engine.
Replacing the heater hose bypass fitting will depend on how the fitting was installed. It could be screwed or bolted in. Try searching for your specific vehicle for a detailed description of the install.
To bypass the heater corer in a Chevy Cavalier, disconnect the heater core hoses at the firewall. using a hose splice available at an auto parts, slide the hoses on the ends of the splice. tighten the hose clamps down. Check the coolant level in case it is low due to losing any during the procedure. Wash the ground thoroughly because any coolant left is toxic to animals.
On the firewall, engine side, will be 2 hoses held onto the heater core pipes with clamps. Make sure the engine is cool, and get a bypass peice from your local Autozone, or what have you. Unscrew those clamps, and take the hoses off, then put the 2 hoses on the bypass pipe, and clamp back down. Do this only when the engine is cold. You will likely have to have the car up on jackstands, or wheel ramps. Its much easier to access the pipes from under the car. If you are tackling this job, you might just consider replacing the heater core while you are there. Its only about 30 mins more work, and is fairly easy. Best to grab a service manual for detailed instructions on this.
Heater coolant bypass pipe It would be the return hose for the heater.
you probably have a leaking heater core....you can replace it or bypass it
heater core has a leak replace heater core