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Re: 1993 Eurovan coolant leak
From volkswagen would be the easiest. Shouldn't cost much. They will mail it to you you do not even have to go to the dealer. Just call any dealer and ask to speak to the parts department, nearly everyone now will allow you to this over the phone. Hope this helps, if not I can offer you several ways to get it.
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You can always drain a radiator by removing the lower radiator hose; often the radiator has a drain **** you can unscrew as well. ON VW products there may be a quick-disconnect U-shaped wire bail that needs to be pulled out ¼-½" in order to release the plastic coupling (VW/Audi hoses are often unique, can't just buy one from the store) and then you have to winkle the coupling off. When you replace the coupling consider using a bit of raw coolant to lubricate the O-ring in the plastic coupling if there is one and/or replace the O-ring. If you break the coupling you'll need t? get a new hose assembly.
It sounds like your thermostat is not opening. You can take the hose off which contains the thermo and remove the thermo. Now there should be nothing keeping the coolant from circulating except the radiator which may be pluged.
You now will not get heat but this will get you to the garage. Let me know it this does not work,
Loosen the plastic petcock valve at the bottom of the radiator to drain the coolant from the radiator, loose and remove both hose clamps slide them down away from the clamping area then take a pair of large channel lock pliers and sqeeze gently and turn the rubber hose to crack the bond that exists between the rubber hose and the metal tube, be sure not to squeeze too tight when getting the hose to turn, proceed to pull the hose off. Install the new hose with clamps slide the clamps over the hose ends and tighten them being sure to locate them 1/4" from the end of the hose, refill radiator and check for leaks.
With a 1993 it is likely a hose that is leaking. You need to start the engine after filling up the radiator (through the cap that says never open when hot) Bring the car up to operating temperature and find the source of the leak. Hoses are easy to replace they cannot be repaired. remove the clamp on both ends of the leaking hose and pull the hose off. replace with the clamps loose and tighten them down refill the radiator and you're good to go. In the off chance it's not a hose you'll have to take the car into a shop to have it fixed.
just fill from the coolant reservoir; the radiator itself doesn't actually have a cap, so the pressure release valve is on the cap to the coolant reservoir. Make sure to tighten it well, though, because the cap is plastic and known to leak a little fluid if not tightened all the way.
You've lost engine coolant somewhere, and need to fill the engine back up with the VW special G12 coolant.
Then find the leak, which will be in one or more of the following places - Water hoses to heater core, including any other coolant carrying hoses in the engine compartment Radiator hoses Plastic manifold bolted to side of engine which is known to leak (have replaced on an '01 VW Beetle, and an '02 Jetta, both members of our family in the past few years.). Overflow reservoir cracked Radiator leak.
Reply back what you find. If the engine got too hot, you may need to have the thermostat replaced.