COOLANT HELP

jmb · Feb 13, 2015

It's my first time using this site still trying to figure everything out. I have a 2008 6.4. The heat stopped working last weekend. The coolant was very very low. I have no leaks at any hoses and the radiator is about 8 months old. where could i be loosing coolant? I have a tuner and dpf and egr delete.

08Monster · Feb 13, 2015

Check for coolant in your oil. Could be a leaking oil cooler.

jmb · Feb 13, 2015

thanks. i read somewhere that it could be coming out of the exhaust? but theres no sign of that?

sootie · Feb 13, 2015

is there a dried white substance around the degas cap?

also pull the oil fill cap and see if there is a milky sludge on the bottom of the cap

jmb · Feb 13, 2015

no white substance around cap

08Monster · Feb 13, 2015

It would smoke white and smell sweet if it was burning it out the exhaust.

eiorg9 · Feb 13, 2015

You could be losing it in a few different places. My guess would be at one or multiple spots at the connectors of the Rad Hoses. Ford has since updated these hoses but there are 3 of them and they're $75 each...so $225 for all 3. Also i had an issue with my last radiator(first one lasted 115,000 miles and i had the 2nd OEM Radiator went out in under a year.) The Ford OEM radiator sucks. Plain and simple. I have since installed a Mishimoto and I'm SUPER happy. Mishimoto has also come out with the 3 RAD hoses but they want $450 (Normally $550) but they are all C&C machined and have the double bell house end on both ends rather than just on one side as Ford has done. But what i found was happening to me was that my radiator only started leaking when it got to temps above 190. Which makes sense because thats when the thermometers activate.So it only leaked when i was driving. I had the same symptoms as you do now.

jmb · Feb 13, 2015

ok thanks a lot. ill check what you said

RedRice589 · Feb 14, 2015

Welcome! Hope you get it straightened outz

01pwrstkr · Feb 14, 2015

Welcome! Good luck and let us know what you find!

"3 can keep a secret if 2 are dead"

jmb · Feb 15, 2015

Thanks guys. I was about 3 1/2 gallons low. Filled it up Friday and been constantly checking for any leaks or anything. Found nothing. Running perfect. Still have no idea where it went? Maybe when I got the radiator put in they didn't fill it up???

cbf9703 · Feb 17, 2015

jmb said:
Thanks guys. I was about 3 1/2 gallons low. Filled it up Friday and been constantly checking for any leaks or anything. Found nothing. Running perfect. Still have no idea where it went? Maybe when I got the radiator put in they didn't fill it up???

Anything's possible, but if that's the case... shame on you for not glancing at it in 8 months

oke: lol. BTW, welcome!

jmb · Feb 17, 2015

Yea yea I know lol

Mishimoto · Feb 17, 2015

eiorg9 said:
You could be losing it in a few different places. My guess would be at one or multiple spots at the connectors of the Rad Hoses. Ford has since updated these hoses but there are 3 of them and they're $75 each...so $225 for all 3. Also i had an issue with my last radiator(first one lasted 115,000 miles and i had the 2nd OEM Radiator went out in under a year.) The Ford OEM radiator sucks. Plain and simple. I have since installed a Mishimoto and I'm SUPER happy. Mishimoto has also come out with the 3 RAD hoses but they want $450 (Normally $550) but they are all C&C machined and have the double bell house end on both ends rather than just on one side as Ford has done. But what i found was happening to me was that my radiator only started leaking when it got to temps above 190. Which makes sense because thats when the thermometers activate.So it only leaked when i was driving. I had the same symptoms as you do now.

Thanks eiorg! Great to hear you are enjoying the radiator. :thumbup:

1ATony · Feb 20, 2015

Thanks for joining

Tony:rockon:

jmb · Feb 20, 2015

Okay well this noting 1 week after adding coolant the head started getting cold again on the way to work then got warm again. Can't find any coolant leaks anywhere????

ThreeFitty · Feb 20, 2015

Maybe something is going on with the thermostat? What does ECT get up to? Did you check out your oil?

jmb · Feb 20, 2015

Engine temp is normal. So the oil could cause this? Or thermostat?

ThreeFitty · Feb 20, 2015

jmb said:
Engine temp is normal. So the oil could cause this? Or thermostat?

Didn't know if you monitored coolant temp, that's what I meant by ECT. And I would say that you could see I you have an internal leak by looking in your oil for coolant. Could be oil cooler like said before. And if you are hit or miss on heat your thermostat may be hanging up both opening and closing. How many miles on the truck?