Bad STC fitting
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Senior User
Joined: May 2009
Posts: 283
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From: Colorado Springs Colorado
Bad STC fitting
Hey guys I need your help.
I think my STC fitting is going bad, but at this time the only symptom I have is a noise like two metal plates rubbing against each other, or a bad bearing(on decel or while coasting). Other than that the truck startes and runs fine accept once when I had the truck parked downhill in my drivway and then it took like 10 second of cranking befor it lit(have not tried to repeat this). Is there anything I should be worried about at this time or should I let it go a little bit longer before trying to get it fixed. I talked to the dealer about it and they said if the truck is running they can't do anything about it. I tend to think that is a bunch of manuer, because the way I look at it the if the fitting isn't working as designed then it's broken and should be fixed. As always your input is appreciated.
I think my STC fitting is going bad, but at this time the only symptom I have is a noise like two metal plates rubbing against each other, or a bad bearing(on decel or while coasting). Other than that the truck startes and runs fine accept once when I had the truck parked downhill in my drivway and then it took like 10 second of cranking befor it lit(have not tried to repeat this). Is there anything I should be worried about at this time or should I let it go a little bit longer before trying to get it fixed. I talked to the dealer about it and they said if the truck is running they can't do anything about it. I tend to think that is a bunch of manuer, because the way I look at it the if the fitting isn't working as designed then it's broken and should be fixed. As always your input is appreciated.
Fleet Owner
Joined: Nov 2003
Posts: 27,912
Likes: 3,625
Many dealerships take this approach - sad but true. Ask around and find the dealership w/ the best reputation. Take it there.
I assume you are still under warranty (5 yr / 100k)?
Keep at it until you get it fixed. It could be something that just causes more problems every mile you drive. If it is the HPOP, you do not want pieces being generated, taking out your IPR valve (and being hard to clean out). In fact, if it is anything in the HPO system, do you want to risk being stranded?
Do you have any mods (like larger exhaust)?
Has there been any work under your hood recently?
I assume you are still under warranty (5 yr / 100k)?
Keep at it until you get it fixed. It could be something that just causes more problems every mile you drive. If it is the HPOP, you do not want pieces being generated, taking out your IPR valve (and being hard to clean out). In fact, if it is anything in the HPO system, do you want to risk being stranded?
Do you have any mods (like larger exhaust)?
Has there been any work under your hood recently?
Cargo Master
Joined: May 2006
Posts: 2,116
Likes: 6
From: Florida
I have heard of those symptoms before, the sound you are describing along with long extended crank times. could be a couple of things related to the hpop or stc fitting. it is a very common problem on the 05' model year. I would definitely be trying to find another dealership. BTW. do you think they would say that if you were footing the bill?
but the first thing is to find a reputable dealer. that can properly diagnose and fix.
taken from http://www.forddoctorsdts.com/articl...icle-07-08.php
but the first thing is to find a reputable dealer. that can properly diagnose and fix.
"Since the redesign of the high pressure oil pump for 2005 and newer Power Stroke diesel engines the "snap-to-connect" or STC fitting used to connect the high pressure oil pump to the oil supply branch tube has been problematic. The two piece fittings have a tendency to flex causing wear on the seal and the locking ring resulting in leaks and occasionally the complete separation of the fitting. When a leak occurs at this fitting, the engine may be difficult to start or may not start at all. Depending on the severity of the leak the engine may stall, sometimes abruptly and without warning. See article 6.0L ICP System Leaks which describes high pressure oil system leaks and basic diagnostics."
Posting Guru
Joined: May 2003
Posts: 1,990
Likes: 1
From: Middleburg, FL
If it's the STC fitting causing the metallic sound you hear, then you will eventually start having starting issues when the engine is warm/hot because the slip joint of the fitting has become partially disengaged. Mine starting making a metallic noise at around 1500-1800 rpm under light/constant throttle and I knew something wasn't right. However, I held off taking it in until I started getting a more definitive problem that could be positively diagnosed. (Sounds can be like gremlins and almost impossible to chase down and I'm not big on exploratory surgery on my baby.) About 1000 miles later I started having no start issues with the engine warm/hot and took her in and it in deed turned out to be the STC fitting.
However, as was already mentioned, it could be a loose exhaust component. Check your exhaust system (especially down and up pipes) for anything making contact with your firewall or other component. There's also a TSB for exhaust drone that leads to addition of a turbo pedastal bracket if that's the cause. I'm not real sure what exhaust drone sounds like but I thought I'd throw that out there as well.
Hope you get it figured out.
However, as was already mentioned, it could be a loose exhaust component. Check your exhaust system (especially down and up pipes) for anything making contact with your firewall or other component. There's also a TSB for exhaust drone that leads to addition of a turbo pedastal bracket if that's the cause. I'm not real sure what exhaust drone sounds like but I thought I'd throw that out there as well.
Hope you get it figured out.
Postmaster
Joined: Feb 2006
Posts: 3,201
Likes: 4
From: waynesville, mo.
The reservoir that the high pressure pump feeds off of is in the front of the engine. There is a "channel" leading from the reservoir to the high pressure pump. This channel is not pressurized. If you park nose down, I would expect a longer crank time. When you decellerate, the 6 liter has a tendency to do the "turbo fart". But if you're convinced its the stc fitting, just tell your dealer to replace it. If its bad, they do it under warranty, if its not bad, you'll pay the bill. Easy, HUH?
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Senior User
Joined: May 2009
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From: Colorado Springs Colorado
Thanks for the input guys. I do have an appointment with the dealer on Monday to have them look at it. My truck has been making this noise since I bough it in May, and I am getting a little more concerned about it right now beacause befor the engine needed to warm up a bit before it would start making any sound and now the noise is present when cold. I have also heard other 6.0's making the same sound when they drive by in a parking lot.
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Thread Starter
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Senior User
Joined: May 2009
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From: Colorado Springs Colorado
[quote=bismic;7968797] I assume you are still under warranty (5 yr / 100k)?
I should be under warranty. My oasis report shows the warrenty period satrting in June 2005 and the milage is under 100,000.
[quote=bismic;7968797]Keep at it until you get it fixed. It could be something that just causes more problems every mile you drive. If it is the HPOP, you do not want pieces being generated, taking out your IPR valve (and being hard to clean out). In fact, if it is anything in the HPO system, do you want to risk being stranded?
To keep it simple I do not want to get stranded anywhere and run the risk of getting "The Super Sucker Drive By Blues"
[quote=bismic;7968797]Do you have any mods (like larger exhaust)?
No mods except a coolant filter.
[quote=bismic;7968797]Has there been any work under your hood recently?
No major work under the hood since I've owned it.
I should be under warranty. My oasis report shows the warrenty period satrting in June 2005 and the milage is under 100,000.
[quote=bismic;7968797]Keep at it until you get it fixed. It could be something that just causes more problems every mile you drive. If it is the HPOP, you do not want pieces being generated, taking out your IPR valve (and being hard to clean out). In fact, if it is anything in the HPO system, do you want to risk being stranded?
To keep it simple I do not want to get stranded anywhere and run the risk of getting "The Super Sucker Drive By Blues"
[quote=bismic;7968797]Do you have any mods (like larger exhaust)?
No mods except a coolant filter.
[quote=bismic;7968797]Has there been any work under your hood recently?
No major work under the hood since I've owned it.
Thread Starter
|
Senior User
Joined: May 2009
Posts: 283
Likes: 0
From: Colorado Springs Colorado
If it's the STC fitting causing the metallic sound you hear, then you will eventually start having starting issues when the engine is warm/hot because the slip joint of the fitting has become partially disengaged. Mine starting making a metallic noise at around 1500-1800 rpm under light/constant throttle and I knew something wasn't right. However, I held off taking it in until I started getting a more definitive problem that could be positively diagnosed. (Sounds can be like gremlins and almost impossible to chase down and I'm not big on exploratory surgery on my baby.) About 1000 miles later I started having no start issues with the engine warm/hot and took her in and it in deed turned out to be the STC fitting.
However, as was already mentioned, it could be a loose exhaust component. Check your exhaust system (especially down and up pipes) for anything making contact with your firewall or other component. There's also a TSB for exhaust drone that leads to addition of a turbo pedastal bracket if that's the cause. I'm not real sure what exhaust drone sounds like but I thought I'd throw that out there as well.
Hope you get it figured out.
However, as was already mentioned, it could be a loose exhaust component. Check your exhaust system (especially down and up pipes) for anything making contact with your firewall or other component. There's also a TSB for exhaust drone that leads to addition of a turbo pedastal bracket if that's the cause. I'm not real sure what exhaust drone sounds like but I thought I'd throw that out there as well.
Hope you get it figured out.
Thread Starter
|
Senior User
Joined: May 2009
Posts: 283
Likes: 0
From: Colorado Springs Colorado
The reservoir that the high pressure pump feeds off of is in the front of the engine. There is a "channel" leading from the reservoir to the high pressure pump. This channel is not pressurized. If you park nose down, I would expect a longer crank time. When you decellerate, the 6 liter has a tendency to do the "turbo fart". But if you're convinced its the stc fitting, just tell your dealer to replace it. If its bad, they do it under warranty, if its not bad, you'll pay the bill. Easy, HUH?
Posting Guru
Joined: Apr 2005
Posts: 1,035
Likes: 2
From: duncan oklahoma
do a search on this forum.im sure theres a video posted of the noise.most of the time the stc fitting will start fine cold but when the oil heats up it gets thinner and bypasses the seal easyier and can cause a long crank no start when hot.
FTE Leadership Emeritus
Joined: Aug 2007
Posts: 42,085
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From: Lakewood, Ca.
From the Tech Folder sticky at the top of this forum:
https://www.ford-trucks.com/forums/8...urbo-abcs.html
Thread Starter
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Senior User
Joined: May 2009
Posts: 283
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From: Colorado Springs Colorado
I have been driving this truck for 5 years now, and it still makes the same sound. I don't know what the noise is, but I think it has to do with the injectors, and the HPOP. I have installed the one piece STC fitting, and replaced the stand pipes, and dummy plugs, and the thing runs great. At the time I wrote the post I was new to the 6.0l powerstroke, and to say the least was a little paranoid, and I learned to relax, and I love my truck.