STC Fitting Questions
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Senior User
Joined: Jan 2008
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STC Fitting Questions
After getting my truck back in July and riding around for a while with the SGII, I feel like it is in really great shape. Now my focus is upon making it reliable so I do not get stranded anywhere. Seems like I was told that if the STC fitting lets loose, and could at anytime, It would leave me stranded. My question is, will the STC fitting give me any warning signs of needing replaced, such as a drop in ICP value, or does it just happen without warning? Should I go ahead and jump in to replacing the STC, or wait for a warning sign. BTW, the truck is a 06 F350. Also, I hear guys always talking about getting the oasis report. I know this is done at the dealer but do I need to talk to a service manager or what? Also what fees are associated with getting an oasis report. It would be sweet if the STC had already been done.
Posting Guru
Joined: Jun 2012
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From: Nor Cal
When I had my hot no start , I just let it cool down so the oil thickened back up and it started right up. I drove it for another month with no problems. I had another no start during a 105* day, that was the first start of the day around 10:00. I just waited until sunset and it fired rightup. Iordered the part and put it in a week later. But like Clint said "Do you feel lucky punk". Well I DID! !!!!!!!
Elder User
Joined: Jan 2011
Posts: 951
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From: Center, Texas
With the fitting you will start having hot no starts but it could also be your dummy plugs, the stand pipes can but arent normally the issue. Also with the fitting, it can go out completely. I had several hot no starts and then mine went and completely shut the truck down. Thankfully we had just pulled in the driveway. Just monitor your ICP and IPR and you should be able to pinpoint if you have a high pressure leak. There are other things such as the oil rail seals and upper injector orings that can cause this aswell. I just went through the hot no starts a second time and it was my oil rail nipple cup seals and they had taken out 2 of my upper injector orings. I was only building around 300 psi during cranking hot.
Senior User
Joined: Sep 2012
Posts: 220
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From: Central TX
My STC fitting went out with no warning 1600 miles into a trip, was pulling a 5th wheel. Gliding to a stop at an intersection on the highway prior to turning into a diesel station. Engine died, no restart. Local Ford dealer replaced STC fitting. Failed in late June of 2010. Purchased truck in Oct 2005, so still within warranty. Dealer told me my truck was only the second 6.0 they had seen this problem. Delayed my trip by two nights which was great service. No gauges at that time so did not have had any indication of a problem, engine had run perfectly up until it died. Only had 41536 miles on truck when it failed. I would ck oasis reports and if no conclusive evidence, I would open up and see if new STC fitting is in truck. Change standpipes and dummy plugs at the same time if you change the STC fitting. That is what started me looking into the 6.0 and what potential problems needed attention.
Mountain Pass
Joined: Nov 2005
Posts: 164
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From: Cloverdale VA
I'll second the catastrophic failure story. Mine was starting slow due to dummy plugs leaking. I replaced those and good to go. Starts like I remembered it should.
Then one day several months later, while pulling my gooseneck loaded with hay it just died while coming to a stop coming off the highway. Right in the middle of a very busy intersection as luck would have it.
I wasn't having hard starts just prior to the failure. When I opened it up the fitting was in 2 separate pieces.
The other reason for replacing it with the updated part in your timeframe, is that most likely a mechanic will try and charge you for a hpop. I only even toyed with the mechanic idea (a very well respected locally, primarily powerstroke mechanic) because mine let go on a Tuesday and I flew to Brazil for 2 months the following day. When he said the hpop was bad I had the truck removed from his shop and I fixed it when I got back. Still running the original hpop 15k miles later.
IPR % 22.4 @idle
ICP ~ 585 psi.
Then one day several months later, while pulling my gooseneck loaded with hay it just died while coming to a stop coming off the highway. Right in the middle of a very busy intersection as luck would have it.
I wasn't having hard starts just prior to the failure. When I opened it up the fitting was in 2 separate pieces.The other reason for replacing it with the updated part in your timeframe, is that most likely a mechanic will try and charge you for a hpop. I only even toyed with the mechanic idea (a very well respected locally, primarily powerstroke mechanic) because mine let go on a Tuesday and I flew to Brazil for 2 months the following day. When he said the hpop was bad I had the truck removed from his shop and I fixed it when I got back. Still running the original hpop 15k miles later.
IPR % 22.4 @idle
ICP ~ 585 psi.
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Senior User
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Thanks for the replies everyone. My IPR and ICP run very close to your values dirt leg. I guess I will not mess with it till spring as the truck doesn't get drove much during winter as it mostly pulls a race trailer in summer and during winter I just use it on weekend as my "nice" truck.
Now how do I go about getting that oasis report?
Now how do I go about getting that oasis report?
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Cargo Master
Joined: Oct 2009
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From: missouri
Thanks for the replies everyone. My IPR and ICP run very close to your values dirt leg. I guess I will not mess with it till spring as the truck doesn't get drove much during winter as it mostly pulls a race trailer in summer and during winter I just use it on weekend as my "nice" truck.
Now how do I go about getting that oasis report?
Now how do I go about getting that oasis report?
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Logistics Pro
Joined: Dec 2004
Posts: 4,138
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From: South Weber, Utah
STC fittings are an 05' and up problem
Cargo Master
Joined: Oct 2009
Posts: 2,283
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From: missouri
Nope. 03 04 don't have them
So I don't have anything to worry about on that part.
Lead Driver
Joined: Jul 2004
Posts: 6,950
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From: Foothills, CA
He said if your truck was in here for an STC and broken cover, I wouldn't be able to give you a date I'd have it back to you. That and also the engine or trans has to be pulled to get to the engine cover if your STC blows and breaks it...Going back to Dirty Hairy: "the question is, are you feelin' Lucky?!" I try to do as much as I can to keep the "needing luck" to a minimum...
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Senior User
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I agree. I can just imagine having the whole family loaded and pulling the car to one of our races and breaking down. I believe I will go ahead and upgrade this spring. As I said earlier the truck only gets driven very little in the winter months, and being a school teacher, it seems that I have very little time to mess with it until spring. The good new is that there are no long trips planned until May at the soonest for the truck. I am very mechanical, but I have never messed with a diesel much, as this is my first so I will be doing the labor myself. How much will the STC fitting cost? Also, it seems that most want to do the dummy plugs and Standpipes at the same time? Would you all agree with that? I do not have any current problems, I just want to keep it as reliable as possible. What is the price of the standpipes and dummy plugs? Thanks to all for the replies. I know that I can get good information here. This forum is what opened my eyes up to a 6.0 as a good truck when maintained and with a few upgrades. Most people you meet out try to talk you out of them. Oh well.