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Drain Plug?

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Old Jan 25, 2004 | 04:40 PM
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murder4hire
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Drain Plug?

Where are the drain plugs for the coolant on the block of my '92 4.0?
 
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Old Jan 25, 2004 | 06:08 PM
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Come on, someone's had to have drained their coolant.
 
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Old Jan 25, 2004 | 07:11 PM
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I have never heard of coolant drain plugs in the block- just the radiator.
 
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Old Jan 25, 2004 | 07:40 PM
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There is only one on the radiator, but this is what i did.

Drain the radiator, then remove the thermostat. Put a water hose in the hole where the stat was. Then let it run until the water coming out of the radiator is clear.
 
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Old Jan 25, 2004 | 08:02 PM
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Alright, cuz the Haynes manual said to take out the drain plugs in the block, and said there should be two. Guess they're liars.
 
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Old Jan 25, 2004 | 08:11 PM
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Well i have a 99 4.0. let me go look at my manual and ill get back to you. If there are drains ther should be a pic.
 
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Old Jan 25, 2004 | 08:16 PM
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i couldnt find anything in the manual, but my dad says there are plugs. What section of the haynes manula were you looking in?
 
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Old Jan 25, 2004 | 09:18 PM
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It should have plugs but they would be pretty far down on the block and hard to find, square ends. If your flushing don't worry about it.
 
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Old Jan 25, 2004 | 10:10 PM
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I was just looking in the tune up and routine maintenance section. In the cooling system part under draining.
 
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Old Jan 25, 2004 | 11:33 PM
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As mentioned just flush it & dont worry about it. After 12 years those plugs are probably so corroded they wouldnt come out anyway.
 
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Old Jan 26, 2004 | 03:54 PM
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That is where i was looking too.

Why is it that you need to flush it?
 
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Old Jan 26, 2004 | 07:05 PM
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Originally posted by BubbaP
I have never heard of coolant drain plugs in the block- just the radiator.
Many moons ago, engines used to come from the factory with drain "pet*****" that went into the block...
 
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Old Jan 26, 2004 | 09:30 PM
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I was just thinking there might be more sediment the further down I drained it, but I guess if I flush it, all the sediment will come out anyways. Oh, and I dont really know how much water is in the system compared to coolant, so I thought I'd drain it all, then just fill it up with the right mixture. But I'll just fill it up with 50-50 mixutre and it should be fine.
 
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Old Jan 26, 2004 | 10:01 PM
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Yeah, the zerex flush kits o a pretty good job for that, but you still wont get it all out. To take the thermostat housing off is only 3 bolts (although they are a pain to get to. I took off my intake to make it easier). Then open the drain on the radiator and put the water hose right in the block. It worked great for me. You might want to get a new stat and seal while you are there, but they are less than 10 dollars.
 
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