Question about 1991 Ford F350

3 Answers

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

Posted by on


3 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 589 Answers

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

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Top Expert:

    An expert who has finished #1 on the weekly Top 10 Fixya Experts Leaderboard.


    An expert that got 20 achievements.


    An expert that got 10 achievements.

  • Ford Master
  • 46,683 Answers

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

1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya Mechanic can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US.
click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

My 2000 devil rad is cold on one side and hot on the other.And overheating

you have a blockage in your rad hence the reason its overheating.
if you buy a can of engine flush and drain out all your water and anti freeze and the flush the cooling systen with the flush fluid ok, do this a couple of times ,and your problem will be solved
hope this helps

Mar 05, 2013 | Cars & Trucks

1 Answer

Where is drain plug for rad on 99 couger 2.5 v6

at the bottom of the rad on the side tank attached to the rad it might be on either tank there is one on each side of the tank.the drain plug usually faces down towards the ground or it faces the motor on the motor side of the rad.some are hard to find and look like a wing nut which has a flat portion that sticks up that you can grab with your fingers to turn.

Dec 07, 2011 | 1999 Mercury Cougar

1 Answer

Where is the radiator drain plug on 1998 northstar 4.6---------------------tryed to search for it and no one seems to answer my question

rad drain plugs are always at the bottom of the rad either facing downward towards the ground on one side of the rad or the other or still at the bottom but facing the motor on one side or the looks kind of like a wing nut like what is on an air cleaner.sometimes they are hard to find but are there.

Oct 25, 2011 | 1998 Cadillac DeVille

1 Answer

How to i flush a radiator on a 2000 expedition and what tools do i need?

you need, knife/ gear clamp,screwdriver /nut driver (for gear clamp) and garden hose
with water pressure hook up hot water is better
you can buy a can or to of rad flush but dishwasher soap works good (it wont suds up )
also rad flush kit with garden hose addapter (most kit are compatable)
1-drain existing coolant in container for recycling
2-locate heater return hose to block and cut to installed flush kit addapter
always better to reveres flussh system with engine off and rad cap removed
drain valve closed hook up garden hose and run hot tap water true system
it will eventually cove out your rad cap (surge tank) until it runs clear
know sut off the garden hose add your cleaning additives installed rad filler cap
run engine per direction on can or 10 to 15 min. sut off engine removed filler cap
open drain valve on radiator and drain out system open water from garden hose
run water until clean water run true shut off garden hose and removed cap off with
cap supplied with kit let system drain completly . repeat cleaning operation until
water runs clear
add 1 jug of concentrated coolant (will mix with ressidual water and finish filling
system with premix used recomended coolant only for your engine your freeze
point of new coolant should be above spec and will be fine
do not used pure concentrated coolant only .your ownners manual spec section will
give capacities system will hold

Apr 03, 2011 | 2000 Ford Expedition

2 Answers

Looking to flush my radiator and cant find the drain plug

The drain plug is generally near the left hand side of the car. If you can't find it, you could always remove the lower radiator hose. It will send a lot of coolant out in a hurry, but you'd still be able to flush it safely that way. I hope this helps

Jan 31, 2011 | 1998 Ford Escort

1 Answer

How do you empty raidiater fluid

there is a drain plug lower corner of rad look for .50c size hole in plastic cover may even be flip style door your gonna have to get your head under and look for plastic wing nut at bottom of radiator

Nov 01, 2010 | 2007 Ford Five Hundred Limited Sedan

3 Answers

Drain radiator coolant on 1991 ford escort

looking under hood drain petcock will be on bottom right side
best bet to get to it is to unbolt plastic under car and access it from there

Jan 18, 2009 | 1991 Ford Escort

1 Answer

Radiator coolent plug

on the bottom of the rad. is a pitcock looks like a plastic wing nut. i believe its on the passenger side

Sep 27, 2008 | Honda Civic Cars & Trucks

1 Answer

Trying to replace coolant

if you stand in front of the car at the bottom right of the rad you will find a black platic wing nut.(under the battery tray) place a container under this for 7 litres of fluid and remove the wing nut. leave the expansion cap on untill you have done this and then remove the cap.

Jul 19, 2008 | 2002 Daewoo Leganza

2 Answers

1991 Ford F 350 Dual rear-end

To willmc8608

If the Therostat housing is mounted on the left front of the engine, unbolt the alternator and it's mounting, then unbolt the vaccum booster pump, this will reveal the mounting bracket to the fuel filter assembly mounting braket, unbolt the supports to the assembly and move to the side. Two bolts hold the therostat inlet ini place.

Jun 08, 2008 | 1991 Ford F350

Not finding what you are looking for?
1991 Ford F350 Logo

184 people viewed this question

Ask a Question

Usually answered in minutes!

Top Ford Experts


Level 3 Expert

77194 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22265 Answers


Level 3 Expert

5579 Answers

Are you a Ford Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides