Question about 1991 Ford F350

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We have a 1991 ford 350 and it is overheating

Our truck is overheating we were going to flush the rad but we cannot find the wing nut to drain the water there is two brass fittings going into the rad one near the top and one near the bottom are these involved and if it is not the radiator what else could be the problem

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  • Master
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Most likely it's a stuck / faulty thermostat.

The two brass fittings are for the automatic transmission fluid cooler.

Some models simply don't use a drain valve.

Posted on Jun 08, 2008

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  • Ford Master
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Best way to drain the radiator for flushing is to take the bottom radiator hose off. wrap a lot of rag around the hose and jam it in the bottom of the radiator and flush to the to out of the top radiator hose which you would have taken off also In reality flushing a radiator does little as the junk is already jammed in the cores and will not move out. Safest and cheapest way is to replace the radiator. Have the block flushed out or else the gunk in the block will block the new radiator.

Posted on Mar 31, 2013

Ya flush it but might be freeze plugs also leaking old fliuds will do that also terma stat would cuse it also hey nitro bike me djnick lol

Posted on Jun 08, 2008

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