Question about 2004 Ford F350

1 Answer

Bad thermostat on 2004 F350 Diesel 6.0

I have to replace my thermostat and not sure how

Posted by on

1 Answer

  • 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
  • 541 Answers

Drain the coolant out and remove the thermostat housing from the top of the engine - where the top radiator hose meets the domed cover on the top of the engine. Note how the thermostat is situated and replace the new one facing the same way. You will need to remove all of the old gasket material using a plastic scraper so you don't scar the metal and create a leak. Make sure the gasket pieces don't fall into the engine opening. (stuff an old rag in the hole). The parts store will tell you how to put the new gasket in and whether you should use RTV sealant or not. If you need RTV, use just a little. Put the gasket and thermostat in, put the housing over them and tighten the bolts by cinching one then the other until they begin to get tight. You are working with pot metal and aluminum so don't get too aggressive in making them tight. Replace the top hose if you disconnected it, refill with 50/50 coolant and antifreeze and run the engine to normal operating temp and look for leaks. If you find one, let the engine cool and try tightening the bolts a bit more. Make sure that the hose clamp is good and tight too.

Posted on Mar 12, 2009

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 expert 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 repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (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

Where is the oil pressure switch on a 2004 f350?

the oil pressure switch on a 6 liter diesel is right behind the oil filter housing
it has a 1 wire switch the oter switch close to it is the oil temp switch

Nov 07, 2010 | 2004 Ford F350

1 Answer

I have a 2004 ford f350 6.0l diesel. its keep overheatin specially at higher speeds. When i start it itll blow white smoke out everyonce in awhile. i put a new thermostat in it and now when its idling and...

My 2004 was doing the same thing and it was the egr cooler, i bypassed the cooler and replaced the oil cooler while i had the top of the engine apart,problem solved

Aug 12, 2010 | 2004 Ford F350

1 Answer

2004 F350 diesel no heat in cab when at idel driving or over 1000 RPM is fine

Sounds like the thermostat is not closing completly if
at all. When you're driving or running it up to 2000 rpm. the engine is working and gets warmer, at idle
no work no heat. replace the thermostat and I think
that will warm things up. Hope this helps.
Good luck.

Feb 03, 2010 | 2004 Ford F350

1 Answer

Ford f350 2005 diesel the temperature lite is on overheat, my heater has no been working so I think I need to replace thermostat>

is there coolant in the rad? don't just look in the overflow be sure there is coolant in the rad if there is perhaps it is time to change the water pump check to see if it is circulating if so then it probalbly si the the thermostat

Nov 10, 2009 | 2004 Ford F350

1 Answer

2004 Ford F350 diesel, changed fuel filters hard starting

Pull the filters and ck for plastic or o-ring in wrong place. Something is up in the filter. 

Jul 28, 2009 | 2004 Ford F350

1 Answer

2004 diesel hard to start when cold

It sounds more like the glow plugs, the older models had trouble out of the module, but the 6.0 is pretty safe from all those problems. And don't forget to use the correct fuel additive for diesel engines, it helps .

Jan 14, 2009 | 2004 Ford F350

1 Answer

1989 ford f350 diesel wont start

Bad glow plugs most probably or the glow plug controller. to check your glow plugs remove wire and check with ohm meter to ground. if they are working you should get a low ohm reading if one has a high ohm reading it is bad. if all injectors check good make sure your fuses are ok, also check and see if you hear the controller click when you turn the key to on. Does the wait to start light come on?

Dec 27, 2008 | 2004 Ford F350

1 Answer

Diesel Wait light does not come on, starts rough and thermostat pegs out.

either you have loose connections to the glow plugs or the fuseable link to the glow plugs is bad check this out and i'm sure your problem will stop. please rate the solution..thanks

Sep 21, 2008 | 1991 Ford F350

Not finding what you are looking for?
2004 Ford F350 Logo

1,224 people viewed this question

Ask a Question

Usually answered in minutes!

Top Ford Experts


Level 3 Expert

70387 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22041 Answers

Ron Lankford

Level 3 Expert

5386 Answers

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

Answer questions

Manuals & User Guides