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Old 01-05-2011, 08:15 AM   #1
EJ Krueger
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Heater not working, radiator hoses only warm

Heater not working unless driving(warm air at a stop), coolant level right at the max line, upper radiator hose is only warm to the touch and the lower radiator hose is cold to the touch with the engine up to operating temp (after a 30 min drive) and I can squeeze the hoses very easily. Its about 35f - 40f degrees outside. The hot water valve but the oil fill tube is opening and closing and the vacuum line is hooked up. Wasn't to sure where the heater core is in the glove box but I reached my hand up around the top of a box that resembles a fuse box cover and what ever I touched was to hot to keep my hand on it. Any ideas? 04 6.0 with 110k miles heads, head gaskets, oil cooler, turbo and arp studs done by ford under warranty at 95k miles. EGR welded shut. Thanks for any ideas and hope its not the head gaskets again!
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Old 01-05-2011, 09:46 AM   #2
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If it were my truck I would flush the cooling system with Restore (both directions on the heater) and change the thermostat. The restore removes the silicate deposits left by Ford's gold coolant, refill with a HD truck coolant like Rotella ELC. My '04 makes nice heat in the 20's in two miles of driving, and my EGR cooler is deleted as well.


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Old 01-05-2011, 12:27 PM   #3
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What does your temp guage show? I bet it is less than half way across the sweep. If so replace your thermostat.
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Old 01-05-2011, 02:26 PM   #4
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could be stuck thermostat or failing water pump

usually thermostats stick/fail-safe OPEN - requiring longer warm up times -
if the thermostat is stuck CLOSED you over heat (lack of cool water circulation).

you dont say the year or mileage of your truck so im guessing when i say it could
be a water pump.

you could also have air trapped in the system preventing coolant flow....have
you recently drained or flushed the system ?

what happens when you <SLOWLY & CAREFULLY> open the degas cap (do you
hear pressure let off) ??

flushing isnt a bad idea but if the system is plugged enough youll like have to remove
the radiator and have it rodded and cleaned by a radiator shop - if the radiator
is plugged up that bad you could also have issue w/ the oil cooler and the heater
core also plugged.

changing the coolant will not affect this problem - you've got a coolant flow issue.
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Old 01-05-2011, 04:03 PM   #5
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Quote:
Originally Posted by bushpilot View Post
could be stuck thermostat or failing water pump

usually thermostats stick/fail-safe OPEN - requiring longer warm up times -
if the thermostat is stuck CLOSED you over heat (lack of cool water circulation).

you dont say the year or mileage of your truck so im guessing when i say it could
be a water pump.

you could also have air trapped in the system preventing coolant flow....have
you recently drained or flushed the system ?

what happens when you <SLOWLY & CAREFULLY> open the degas cap (do you
hear pressure let off) ??

flushing isnt a bad idea but if the system is plugged enough youll like have to remove
the radiator and have it rodded and cleaned by a radiator shop - if the radiator
is plugged up that bad you could also have issue w/ the oil cooler and the heater
core also plugged.

changing the coolant will not affect this problem - you've got a coolant flow issue.
It's in there at the end, "04 with 110k miles". Yes I hear a pressure release when I open the cap. Last time radiator was flushed was on the head stud job about 16 months ago.
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Old 01-06-2011, 05:20 PM   #6
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Quote:
Originally Posted by EJ Krueger View Post
It's in there at the end, "04 with 110k miles". Yes I hear a pressure release when I open the cap. Last time radiator was flushed was on the head stud job about 16 months ago.
If you are running the Ford Gold Cxxp coolant you had better read this

This is very important information check link at bottom

Quote:
Originally Posted by Gwar
Does the lack of silicate have any adverse affects??? Not to ask a dumb question but why would ford continue to use a coolant that causes serious issues with its engines???

Does the 6.0L come from the factory with the ford gold or something from international???

(QUOTE) Posted by PGreenSVT at Powerstroke.org

Can't explain away Ford's logic. International uses Fleetrite ELC. Think about it. Whats is another silicate? Sand immediately come to mind. What is sand? It's an abrasive. Besides that it turns to a gell from the heat as it goes through the egr cooler trying to carry off the heat from high egt's resulting in the sludge that clogs the oil cooler. There is a substanial body of evidence supporting this.

Not having silicates is a positive thing. It has no adverse affects. ELC coolant is good for 300k miles without any additives and extendable to 600k with an additive pack at 300k. The new Delo ELC is good for 750k miles or 8 years extendable to 1 million miles.

I think it pretty much speaks for itself.
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I'm on a campaign man. That Gold cxxp is killing our trucks and people need to know. It is the cause of the biggest problems we have with the 6.0 and the bad reputation the 6.0 has. And it is pretty cheap and easy to eliminate. People should know this. So yeah, I'm beating that drum. The other drum is the need to monitor ECT and EOT before you blow your egr cooler and head gaskets.

I just did a flush with Fleetrite Restore, VC9, lots of flushing, installed a coolant filter, and switched to ELC. Im curious to see what my coolant filter will look like after the first 500 miles, I know there is still most likely some cxxp in there still as I still have the stock EGR and oil cooler at 34k miles but I doubt there will be anywhere the abount that we see out of most of the posts with opened up coolant filters.

I recently installed the DieselSite.com coolant filter kit on my 2006 6.0. The kit came complete with everything you need and also came with the new billet aluminum filter head, looks really sharp.

PGreenSVT, dude you need to change your screen name to "ELC FOR LIFE!"

But I agree I just switched to ELC also, either way it cant be any worse than the gold, for those of you that have doubts just scrape the bottom of your degas bottle, thats the same cxxp thats clogging your oil cooler. When I did my flush I pulled my degas bottle and scrubbed it with a bottle brush, that cxxp is like glue.
also read this
(QUOTE) Posted by PGreenSVT Powerstroke.org
--------------------------------------------------------------------------------
Here is the deal with the 6.0. Any good tuner (person writing your tunes) is not going to give you a tune that is going to tear up your truck. There are trucks all over the place running 400-420 rwhp with 750-800 rwtq all day long without problems.

Yes the 6.0 is known to blow head gaskets. This is why it happens. The Ford Gold coolant contains silicates. The silicates are not able to handle high EGT's generated by a good load or relatively high boost when run through the EGR cooler. They break down into a jell like sludge and fall out of suspension. This crud gets caught up in the tiny coolant passageways of the oil cooler. As the cooler clogs up it restricts coolant flow to the egr cooler. Now the egr cooler doesn't have enough coolant to carry off the heat generated by high EGT's. The limited amount of coolant in the egr cooler flash boils causing high pressure in the cooling system and the truck pukes coolant from the degas bottle due to the pressure. (it has to go somewhere)
Your uninformed Powerstroke owner is not monitoring his coolant temps and oil temps so he doesn't know whats going on and he keeps driving it this way. The problem get worse, the pressure causes the egr cooler to rupture. Now the egr cooler is leaking coolant into the intake manifold which then runs into the cylinders. Again the high combustion temps cause the coolant to vaporize. This causes unacceptably high cylinder pressure, the TTY head bolts stretch due to the additional pressure and there go your head gaskets.

Ok now you know the problem. Here's the cure. Get a good engine monitoring solution like the Edge Insight so that you can monitor your ECT and EOT. If those temps get more than 15* apart at normal cruising when at normal operating temperature your oil cooler is clogging up. Rebuild it now to prevent all that down stream damage from occurring. Flush that Ford Gold coolant cxxp out of your engine with a couple bottles of Restore. This is made specifically to clean out that silicate residue. Now refill it with a silicate free Cat EC-1 rated ELC coolant. This removes the silicates that clog the oil cooler from the equation. If you live in an area where you don't have smog inspections delete the egr system. If you can't delete it replace the egr cooler with the cooler manufactured by Bulletproof Diesel. This is vastly superior to the Ford oem egr cooler and it will not fail on you. If you find that you need to replace head gaskets replace the TTY head bolts with ARP studs and use black onyx (Victor Reinz) head gaskets. If you have to replace the egr cooler always replace the oil cooler. That is the source of the problem.

Now that you have addressed the common problems that scare the hell out of people, get an SCT tuner (i like the X3) and install some custom tunes and drive the heck out of it. DO NOT baby it. The Powerstroke hates this and will rebel with turbo issues.

Turbo issues are also common repair points with the 6.0. People like to complain that it's because the VGT turbos are pieces of junk. This is not so. The VGT vanes in the turbo need to be exercised regularly. This means making them go through there full range of motion. So put your foot in it regularly and let is see some full boost runs. That will keep your VGT vanes from getting all sooted up and freezing up because of the soot. Again, that is what happens when you baby it. Put you foot in it and you will have less problems. Lay out of it and try to milk it for mileage like you would a gasser and you're going to have turbo issues. Don't let it sit either. That is also the kiss of death to the turbo. The unison ring rusts up and again you have turbo problems. So now that you know you need to give your turbo a regular work out to keep it happy, give it a proper cool down as well. Just whipping into your parking place and shutting it down will lead to coking the bearings and again major turbo issues. Running a good synthetic oil will help here immensely because it handles heat so much better and resists coking. But always let your turbo have time to cool down. This is one of the reasons you need a Pyrometer (EGT gauge), Let the EGT come down to 350* before shutting your truck off. This only takes a couple of minutes, especially if you take it easy on it for the last couple minutes of your trip. If this is too much hassle for you get a turbo timer that will automatically delay shutdown when you turn off the key to allow the turbo to cool down.

Injectors. Fords injection system HEUI fires the injectors with High Pressure Oil, to the tune of 4,000psi at Wide Open Throttle. Maintenance is critical here so you can not let your oil maintenance slide like you can on a gasser. It will kill your injectors. The injectors also are known to suffer from something that we call stiction. That is when the oil side spool valve of the injects hangs up or sticks when cold until the truck warms up. I believe this is caused by varnish buildup that is common to dino oils, especially those containing paraffin. Using a good synthetic oil will take care of that because it actually cleans the engine as it lubricates. If you do find yourself with some injector stiction add a couple of bottles of Rev-X to your oil. It has cleared up 99.9% of the trucks it has been used on. 2 bottles run around $70. A new injector is about $250-$290. Be anal about keeping your oil clean and fresh and changing your fuel filters regularly. The other thing that kills injectors is low fuel pressure. The fuel pressure needs to stay above 45psi at all times and is typically set around 52 psi from the factory. Well the Factory fuel pressure regulator spring is weak and looses it's tension over time and can't maintain adequate fuel pressure. There is an updated rebuild kit that uses a better, stronger spring. Installing this spring will bring your fuel pressure up to about 62 psi and solve that. Get a fuel pressure gauge. It's important.

So that covers the frequent complaints with the 6.0. They are all well known at this point as are the solutions. Does it suck we have to fix Ford's blunders? Heck yes it does. But again we know how and once done you will have a very reliable robust truck that is well worth the effort. So address the issues as you can and enjoy your truck. It is a dynamite vehicle. I love mine.

If you like pictures have a look here.

http://www.powerstroke.org/forum/6-0...ml#post2063212


ELC is the coolant recommended and used by International for this engine. .


Coolant Flush for changing to ELC

Drain coolant by removing lower radiator hose. Drain block from plug on drivers side of the block. Remove the thermostat. Replace plug in block and put lower hose back on. Put thermostat housing back on without thermostat. Fill with distilled water. run for 5 minutes then drain as above..Fill and run 5 more minutes drain. Put in 1 gallon of Restore an top with distilled water. Drive it for an 60-90 minutes then drain. Flush 2 times with distilled water or whatever it takes to come clear. Put 2 qts of VC-9 or 1 gallon of Restore+ cost less and fill with distilled water. Drive it for about 60-90 minutes. Drain and flush after. Flush 3 more times with distilled water untill it come out clean. Replace thermostat or put in a new one. Put hose back, make sure block plug is tight. Add 3.5 gallons of ELC concentrate and top off with distilled water. Make sure to run engine for 5 minutes between flushes to circulate the water good. Have heater on set to hi while doing this to flush the heater core too.
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Old 01-07-2011, 10:48 PM   #7
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I would go with a stuck t-stat and replace it. Might as well go with a simple green and then vc-9 flush prior to changing it.
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Old 01-09-2011, 06:33 AM   #8
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I would go with a stuck t-stat and replace it. Might as well go with a simple green and then vc-9 flush prior to changing it.
Ordered a thermostat the other day. Simple green? like the cleaner? what do you do with that?
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Old 01-09-2011, 07:15 PM   #9
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Ordered a thermostat the other day. Simple green? like the cleaner? what do you do with that?
Nevermind got it now, just a standard green coolant then flush it.
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Old 01-10-2011, 10:58 PM   #10
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if you just had the oil cooler replaced, i wouldnt do the coolant flush.most likely just a stuck open thermostat, especially if you say the lower hose is cold. just my opinion
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