1990 Aerostar 4.0 xl hose information - Ford Truck Enthusiasts Forums



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1990 Aerostar 4.0 xl hose information

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Old 01-11-2018, 06:04 PM
John Scomgty John Scomgty is offline
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1990 Aerostar 4.0 xl hose information

Hi, new here. My aerostar has been leaking coolant, and I've detected the leak is coming from the bottom of the right part of the Y hose in the picture. What exactly does this part of the hose go to and what is the proper name of the hose so I can order a new one. At first I thought the heater core was leaking because white coolant smoke was coming into the cab, but then I pulled off the removable piece underneath the stereo(by the shifter) and saw the smoke was coming from behind it. Im a c
omplete newb to fixing cars. Thanks.
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Old 01-11-2018, 07:03 PM
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Jose A. Jose A. is offline
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it's a Y hose or a Y Bypass Hose. you might find it at O'Reilly's. you will have to remove it to get it matched.

If no luck, you can get a metal "T" adapter-fitting to which you can connect 3 separate hoses, or just cut off the hose that's bad, cut the "Y" and use a separate T adapter with a new hose, or just cut the bad section of the hose, use a straight adapter-fitting and splice a new hose to it.

There are alternatives.
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Old 01-11-2018, 09:12 PM
John Scomgty John Scomgty is offline
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Thanks! What exactly does that hose connect to?
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Old 01-12-2018, 03:39 AM
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xlt4wd90 xlt4wd90 is offline
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It goes to the two heater cores in your van, which evidently has a rear HVAC system. The other Y hose is the return from the cores. If it's actually leaking from the swaged fitting, then you need to replace it. If you try the parts houses, make sure you look for the exact year, as the layouts for different years were different, and the hoses were different.

The other option is to make up something from standard parts, like Jose suggested. It's possible to remove that slip-fit connector from the aluminum tube and install a standard hose with a hose clamp.
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Old 01-12-2018, 05:55 PM
John Scomgty John Scomgty is offline
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Alright, cool,thanks
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Old 01-12-2018, 07:40 PM
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Here in Florida we just bypass the heater cores, ha ha,, its only cold about 5days a year
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Old 01-13-2018, 03:47 PM
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not this year, it's been cold as hell!!
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