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Anti-freeze waterfall

 
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Old 02-11-2011, 02:43 PM
enzer2406
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Question Anti-freeze waterfall

So, last night my "91 F-150 started streaming antifreeze somewhere near the rear of the motor. It is a 5.0L with manual 5speed trans. It was running down my transmission bell housing but I could not see where it was originating from. It was difficult to see what was wet and what was just oil glistening. I checked my oil and didn't have water mixing, so I don't believe it is a head gasket. When I shut it off I heard the steam hissing from the right side and was obscuring my rear spark plug. Being on the right side I'm fairly certain it is not my heater core. Anybody have any insights into where it might be coming from and how to remedy it?
 
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Old 02-11-2011, 02:46 PM
topdogcustoms
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freeze plug
 
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Old 02-11-2011, 02:49 PM
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Do you know where the plug is around there so I can look specifically?
 
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Old 02-11-2011, 02:55 PM
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Originally Posted by enzer2406 View Post
Do you know where the plug is around there so I can look specifically?
Above the oil pan on the side of the block. Im not real familiar with the 5.0 but there is usually more than one.
 
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Old 02-11-2011, 02:58 PM
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Originally Posted by enzer2406 View Post
Being on the right side I'm fairly certain it is not my heater core.
If you say drivers side or passenger side, everybody will understand. Right side or left side is relative to where you're standing.
 
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Old 02-11-2011, 03:02 PM
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FYI: when talking about a vehicle right/left denotes if you were sitting inside the vehicle.
 
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Old 02-11-2011, 03:05 PM
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Sorry, driver's side rear of engine. Right side when I'm looking under the hood.
 
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Old 02-11-2011, 03:07 PM
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After looking some more, I am afraid it may be one of the plugs on the rear of the block. A good portion of the antifreeze was coming out of the bottom of the bell housing. I know I have to pull the trans to get to these. Does anyone know if I have to pull my flywheel too?
 
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Old 02-11-2011, 04:02 PM
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There are no freeze plugs on the back of the block. I had my engine out and I can vouch for that. There are however, plugs on the backs of the heads.
 
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Old 02-11-2011, 04:06 PM
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Thanks, Kapusta. That saves me from a lot of anxiety about this fix. The rear of the heads won't be so bad.
 
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Old 02-11-2011, 04:15 PM
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Hopefully that's all you need. My 302 was leaking from the back because a water jacket cracked from a really hard freeze. I also had water in the oil.
Good luck.
 
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Old 02-18-2011, 12:33 PM
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ok, so it's not my rear freeze plugs in the heads. I got ahold of a fiber scope and could see a river of antifreeze running across the top of my tranny from the middle of my engine. I still couldn't see exactly where the leak is coming from because my fuel lines wouldn't let me get the scope around them just right to see. I'm hearing a hissing sound when it is cooling off which my father thinks might be the intake gasket. I'm still not completely sure what it is but I'm going to tear down the top of my block and replace all of the gaskets in a week or two when I get time between work and classes. I really hope it didn't crack the water jacket! If it did, does that mean the block is trashed?

Thank you everyone for your helpful input.
 
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Old 02-18-2011, 12:52 PM
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I wouldn't think it's a water jacket if it's running across the top of the transmission. I had water dripping from the bottom of the bell housing because of the cracked water jacket. There are two freeze plugs on the back of the upper manifold so you may want to check them. The lower manifold also has a water passage it shares with the heads at the back so that could be a source of a leak too.
 
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Old 02-18-2011, 01:37 PM
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I checked the line that runs between the two heads and did not see leaking coming from it on either side. Wherever it is specifically coming from is no more than an inch above the top of the bell housing. It seems to be dead center or just to the driver's side of center.
 
 
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