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Old 12-13-2008, 06:55 AM
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Merry X-mas to Me!?!

Well, when it goes wrong it goes wrong big. I noticed a little white smoke coming out of my exhaust and then noticed the degas bottle was empty. I filled it up and the smoke gets worse and the bottle kept coming up dry. Off to the dealer where they tell me my headgaskets are crap! Wonderful, haven't even been towing/racing/driving hard since I bought this thing. Anyway, the dealer calls to tell me the wonderful news and asks about tuners/chips and all that fun stuff. The dealer says that anytime you run a tuner it leaves a very obvious "spray pattern" in the cylinder/combustion chamber. Needless to say, the dealer says the warranty bails out if a tuner has been used. The biggest problem I have is that I'm not the original owner of this truck. I made a few phone calls and was able to locate the original owner who stated he didn't use one, but had used 3 different tuners during the first 3 years of the truck's life. Here's my dilemma: If I authorize the teardown and they decide the truck has been "abused" the $3000 bill becomes my problem, plus the cab will be pulled off and the motor torn down before this determination is made. Well, we all know that if you really want to get out of something like a warranty, you can. So here are my questions to the experts: 1) Is this fuel spray pattern legit? I've never heard of that. 2) I should probably do studs on my own if there's any doubt right? Sorry for the super long story. This is the only thing I've had come up on my truck and now it looks like my "awesome" warranty is going to use any excuse to get out of repair. Thanks guys.
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Old 12-13-2008, 03:01 PM
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Well the 6.0's leave almost a star pattern on the top of the piston from the injector pattern, which i supposedly aggravated by many tuners etc.

At any rate here is a bump for you, maybe one of the techs can shed some more light on this for you.
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Old 12-13-2008, 03:18 PM
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I've heard that spray pattern thing thrown around before but i dont believe it is true, i just spoke with my tech yesterday about tuners and he even said they can't tell you had one unless you leave it in the truck or forget to change it back to a stock tune .. other than that you should be fine if they open it up, but hopefully someone who has had experience with theres getting opened up will chime in ...
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Old 12-13-2008, 03:23 PM
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Quote:
Originally Posted by zippy557 View Post
I've heard that spray pattern thing thrown around before but i dont believe it is true, i just spoke with my tech yesterday about tuners and he even said they can't tell you had one unless you leave it in the truck or forget to change it back to a stock tune .. other than that you should be fine if they open it up, but hopefully someone who has had experience with theres getting opened up will chime in ...
I think your tech was just saying that if you had a normal service done they wouldnt be able to tell. but if they tear the truck apart and look at the heads they can tell. Thats what Diesel power mag says.
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Old 12-13-2008, 03:35 PM
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Also from the info i've read on here the injectors spray a star pattern stock. and the pattern doesn't change just for more power being added.
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Old 12-13-2008, 03:42 PM
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The spray pattern is actually noticeable on stock trucks too. It's caused by the pilot injection system. I don't know this from personal experience, I read it on here a while back. I think the star pattern get's bigger when a tuner is used, but who knows. If your doing the HG's, don't mess around and have them use the stock head bolts, get some studs
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Old 12-13-2008, 03:52 PM
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wait a minute... he didn't use a tuner, but had 3 of them for the first 3yrs of the truck? How does that make sense?
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Old 12-13-2008, 04:37 PM
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Yes a tuner will leave a more noticeable star pattern on the top of the pistons but ,theres always a but huh, I have seen patterns that were way darker than tuned trucks on stock trucks.
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Old 12-13-2008, 10:38 PM
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Quote:
Originally Posted by JBakerFX4 View Post
wait a minute... he didn't use a tuner, but had 3 of them for the first 3yrs of the truck? How does that make sense?
Sorry, what I meant was he had 3 separate tuners on it at different times. That seemed like quite a few to me. Most people I see have only used one or two at the most. This guy was going through them like pairs of socks!!!

Thanks for all the information guys. It looks like I'll be picking my truck up and doing headgaskets, studs, and probably an EGR bypass/delete myself. I figure it's probably easier to do all this junk while I'm in there. Any other things I should do while I have my wounded turd down? I would hate to think what might have happened to this thing if I had actually towed anything with it.
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Old 12-14-2008, 03:53 AM
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Here is my spray pattern on a stock truck @ 40k miles. This isn't usually the "tell-tale" sign that they use to determine whether you have been tuned or not. All they have to do is hook up to your PCM and find out the last time it was flashed. If it doesn't correspond to a service visit, you're busted. Some techs don't know or don't care, while other service departments try anything to get out of warranty.

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