6.0 dropping temp making weird howling noise
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6.0 dropping temp making weird howling noise
Alright my truck is doing something weird. 2003 6.0, 160k miles. So the check gauge light is on and it's making a weird howling noise. I can't tell exactly where it's coming from but sounds like front left side. It gets louder as I accelerate. But the temp garage will warm up and then the temp drops from like 160 to 60 and the check gauge light will go off and then sound will go away. But then it comes back on later on. Doesn't lose boost doesn't lose power.
Postmaster
Joined: Aug 2015
Posts: 3,910
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From: NW IA
What are you using to monitor data?
You probably hear the cooling fan kicking in and out, but without something to get us some data readings? Be prepared to open up your wallet hoping something sticks.
You probably hear the cooling fan kicking in and out, but without something to get us some data readings? Be prepared to open up your wallet hoping something sticks.
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Coolant levels are good and I got a juice with attitude that has all my readings. Only codes it's throwing is p0118 engine coolant temp circuit and p0673 which is a glow plug. But the noise is like a loud whining that kinda sounds like it sucking
Postmaster
Joined: Aug 2015
Posts: 3,910
Likes: 18
From: NW IA
I think I would start with checking the wiring to the coolant temp sensor, check it for good and clean connection, no wire chaffing or cuts. If that is all good then might just replace it. With a whacked out sensor you are probably hearing the fan kick in and out from the sensor that is wigging out, which it telling the PCM "run the fan full on, no wait a minute no need for fan now". Next time you run the truck, run the heater and while those wild swings are going on see if the heater feels warm then cold. No way an engine can actually get down to 60*, especially not a 6.0
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