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I have a 94 Chevy Cavalier that is leaking anitfreeze from the heating coil. The problem is I see a 90 degree rubber grommet but no hose that was attached to it.
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YES THERE SHOULD BE DRAIN AT BOTH SIDES @ REAR.,,, TRY GETTING IN TRUNK WITH FLASH LIGHT AND HAVE SOME ONE RUN WATER OVER IT WITH A HOSE , SHOULD BE ABLE TO FIND LEAK THAT WAY
Look for a leak in the hoses between the PCV valve and the motor. If you find any squishy or oily spots on the rubber hoses especially where the 90 degree rubber angles are, this would indicate a hold in the rubber hose and the vacuum leak will cause the vehicle to run poorly at idle.
the clamp is definitely not tight... tighten it first and see if there is a change in heat also refill what you lost in antifreeze also see it the hose itself is not leaking if so replace both to be sure and possible flush the heater core while your at that point .
same problem happened to my 2005 bonneville. inside the trunk and behind the carpet covering the wheel wells there are two water drain tubes. these tubes run down the inside of the "c" pillar and drain the water from the sunroof. they make a 90 degree bend at the bottom back of the wheel well(inside the trunk) and fit inside a round rubber tube/grommet at both of the rear wheel wells that lets the water drain outside.either the plastic 90 degree tube has come out of the rubber tube/grommet or the drain tube could be plugged up with debris. also make sure the two round rubber tube/grommets are installed correctly and seal the hole going through the trunk to the outside of each wheel well. this is of course only for those bonnevilles that have a factory sun/moon roof.
let me guess this vechile has rear heat right? Go under and look for two lines running from the engine compartment to the rear. Both lines will be about an inch, one might be bigger then the other. Find, follow, locate leak, then you can cut the line where it's leaking and place a rubber hose in and DOUBLE hose clamp each end. FYI, anitfreeze will drain out when you cut the line..........have a bucket ready to catch and reuse.
That hose is the drain hose for the air conditioner evaporator. If it is leaking coolant, there's a good chance that your heater core is leaking, as it is in the same 'box' that the air conditioner evaporator is in. You'll need to replace the heater core.
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