In-cab tea kettle noise 6.0

[MRSEATS]

I have looked this up for the last three days and have got several results. From it's normal. To my heagaskets are blown. But every case seems to be different. I have a 2006 f250 with the ever so awesome 6.0 power stroke. With 85,000 miles on it. I bought it as a tow vehicle five months ago and have put 1500 miles on it. So recently I have noticed a Tea kettle whistling noise in the cab, coming from behind the stearing wheel. It only happens when the motor is at normal running temp. and when I am decelorating. Does anybody know what the problem might be? I have no coolant loss, no over heating no symptoms of headgaskets being bad, no check engine lights, nothing! Help!

[PHYRMN]

Your tea kettle sound is probably coming from the degas bottle cap. Check the coolant pressure very soon. Its possible the degas bottle cap is weak or you have excessive coolant pressure.

[MRSEATS]

Originally Posted by PHYRMN

Your tea kettle sound is probably coming from the degas bottle cap. Check the coolant pressure very soon. Its possible the degas bottle cap is weak or you have excessive coolant pressure.

Do you happen to know what would cause the excessive coolant pressure?

Thanks for the help.

[PHYRMN]

Hate to sound like a broken record, but excessive coolant pressure is typically caused by a failing EGR Cooler, or head gaskets.

[MRSEATS]

Originally Posted by PHYRMN

Hate to sound like a broken record, but excessive coolant pressure is typically caused by a failing EGR Cooler, or head gaskets.

How do you test an egr cooler?

[PHYRMN]

Pull the EGR valve and see if its wet or smells like coolant. If the EGR cooler has ruptured it will usually allow coolant into the intake which has to pass by the EGR valve. If the EGR valve is dry with no signs of coolant, then check the coolant pressure by installing a pressure gauge on the small return coolant line on the degas bottle. 6-10 psi of coolant pressure is normal. The degas bottle cap is set to vent at 16 psi.

[PHYRMN]

Quick note here, if you havent replaced your degas cap in a while, pick up a new one. Their inexpensive at any of the major auto suppliers. A weak cap could cause what your seeing under normal operating conditions.

[MRSEATS]

Originally Posted by PHYRMN

Quick note here, if you havent replaced your degas cap in a while, pick up a new one. Their inexpensive at any of the major auto suppliers. A weak cap could cause what your seeing under normal operating conditions.

I will check that out. Do you know how to bypass the egr cooler in California by any chance?

Thanks,

[twoicebergs]

Here we go again... Maybe...

Up-pipe leak, degas cap or wind noise. You gotta find it.

[fuzzman]

Only way to bypass EGR cooler in California is to cheat. If inspector knows what he is doing he will look for the cooler. Lots of ways to cheat, look up "sneaky EGR delete".

I bought an EGR cooler from Bulletproof, which is supposed to solve the problem and keeps you legal. I close the EGR valve with a tune on my SCT tuner. Apparently it's not completely closed all the time, but its mostly closed.