Water Leak in Cab
1990 F150 Custom / 4x4 / 4.9 liter I6 300 / Manual Transmission
Water is coming into the cab near the ECU / computer and I'm wondering if anyone else has had this issue or knows how to fix it. To be specific: If you are facing the pedals / front of the truck (from the inside of the cab), the ECU is mounted horizontally and there is a metal mount / access plate of sorts that mounts to the left side of the wall of the cab to the left of the ECU, just above the 45 degree angle of the floor. I don't think that it's the windshield leaking since water would be all over the place, but anything is possible. I opened the hood and noticed that water runs down the inner firewall of the engine well, right around where the ECU plugs into the wiring chassis. Also, water flows down "somewhere to the right of where the ECU is. Any ideas?! Thanks, Nabor J |
ok, i have one for you to check out. the bracket that holds your clutch pedal and where it sits against the firewall. one the cab could be split on the firewall around this area or the slave master to firewall seal could be leaking
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Originally Posted by jk89cat
(Post 11314761)
ok, i have one for you to check out. the bracket that holds your clutch pedal and where it sits against the firewall. one the cab could be split on the firewall around this area or the slave master to firewall seal could be leaking
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I've had windshields leak.
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Originally Posted by nabor j1
(Post 11315186)
It's not the bracket. The leak is coming into the cab on the left side of the wall right behind the ECU.
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Originally Posted by jk89cat
(Post 11315384)
is all the seam sealer there? and are your cowl drains clear? you may have to remove your inner apron to see that.
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Yes I have a 95' F250XL 6cly manual with a leaking cab on left side. The floor mat is always wet. I thought it was the windshield but now Im not sure. I'll check behind the ECU and keep you updated.
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Originally Posted by ChanManF250
(Post 11315794)
Yes I have a 95' F250XL 6cly manual with a leaking cab on left side. The floor mat is always wet. I thought it was the windshield but now Im not sure. I'll check behind the ECU and keep you updated.
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... or put a diaper on your truck.
There is a foam/rubber gasket behind the flange & frame that the ECU slides into that may have dried out and cracked thus allowing water to flow through the firewall. The problem can be exacerbated by the fact that as you are driving you may have a negative air pressure in the cab relative to that under the hood. This can actually siphon the water through such a crack.
It is many times possible to locate a leak by closing all windows/doors & running the heat/vent fan on "High" using a soap & water solution applied to the engine side of the firewall with a pipette or straw to the suspected leak location. You will know when you've found the leak(s) by the bubbles that develop. To best seal the leak it is best to pull the flange loose from the firewall and clean the surfaces to be sealed, taking care to remove any and all loose and dried out sealant or old gasket material. Apply a suitable sealant - one that will remain soft and pliable. dn. |
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