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Old June 24th, 2013, 05:44 PM   #21
Jiveturkey3
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We are talking about an 11 year old truck. You expect no maintenance? When they were new most got put in under warranty. Also you said labor, I assumed most on this site would get the removal tool and do them theirselves.
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Old June 24th, 2013, 05:56 PM   #22
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So you think 24122 members are going to change injectors themselves? Do you realize there was a class action case pending on the injector issue that the great bail out wiped off the books. The 2003 duramax injector issue is/was more than just a maintenance issue.
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Old June 24th, 2013, 06:03 PM   #23
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So you think 24122 members are going to change injectors themselves? Do you realize there was a class action case pending on the injector issue that the great bail out wiped off the books. The 2003 duramax injector issue is/was more than just a maintenance issue.
Notice I said most meaning the majority but not all. I am not a duramax fan all I am saying is if you want to buy a truck that is 11 years old plan on putting some money into it. You made it sound like the truck was junk replace the injectors and drive. If the money to replace injectors sounds high I would recommend not buying an 11 year old diesel because you probably won't like the other bills that will start rolling in shortly.
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Old June 24th, 2013, 07:23 PM   #24
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I know it's 11 years old and might need some attention, but injectors vs maintenance items is a huge $$$ difference. Also given the odd situation under the hood makes me think there is something going on, who would put a intake on a truck and not mess with more of it. I really don't want something thats been messed with by a diesel ricer or something. No stacks on it at least.

The more I look into it the more I think there is a problem with this thing, should it feel fast? I punch it getting on the highway and there is a 2-3 second lag while you hear the turbo spin up and then it goes a bit better than my 5.3 suburban. Not much better though.
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Old June 24th, 2013, 08:31 PM   #25
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Didn't the Allison transmissions in those trucks have some kind of shifting problem too?
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Old June 24th, 2013, 09:09 PM   #26
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No. The t case wears through after a lot of mile. My 03 is quick. Long bed dually crew cab. Love the truck. Put ~30k on it. It now has almost 200k on it and it starts great, runs great, pulls great. Don't know if the injectors were replaced or not. More than likely. I just ordered a fass fuel system for it. Help save the cp3 and injectors. I service my filter every 10k so I haven't seen any dirt in my intake yet. So I'm gonna keep running the k&n for now.
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Old June 24th, 2013, 10:10 PM   #27
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Isn't the hesitation you speak of the turbo spooling up?
Also known as turbo lag?
The plastic pc missing on the engine is the resonator cover?
Sometimes plugged , along with a cold air intake to try and gain more of a whistle out of the turbo.
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Old June 24th, 2013, 10:17 PM   #28
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I also agree with the oiled filter comments.
From what I have researched a cold air intake will only really start to make a difference on motors producing over 500hp.
I have an 04 max with 105,000 and I did the pump rub fix (transfer case)as it is referred to just for my own insurance.
Still no injector work for mine.
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Old June 24th, 2013, 11:26 PM   #29
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I agree with the cold air intakes not being needed for a mild truck. But although a k&n is not the greatest. I would still go for an aftermarket replacement filter.
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Old June 25th, 2013, 12:26 AM   #30
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I agree with the cold air intakes not being needed for a mild truck. But although a k&n is not the greatest. I would still go for an aftermarket replacement filter.
What is better about an aftermarket filter vs a OEM style paper filter is stock or mildly modified diesel applications?
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Old June 25th, 2013, 12:28 PM   #31
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What is better about an aftermarket filter vs a OEM style paper filter is stock or mildly modified diesel applications?
OEM paper filters are better, anything like the from air hog or an oiled filter let's in more shit than a OEM style paper filter.
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Old June 25th, 2013, 01:22 PM   #32
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Quote:
Originally Posted by Tizken View Post
I know it's 11 years old and might need some attention, but injectors vs maintenance items is a huge $$$ difference. Also given the odd situation under the hood makes me think there is something going on, who would put a intake on a truck and not mess with more of it. I really don't want something thats been messed with by a diesel ricer or something. No stacks on it at least.

The more I look into it the more I think there is a problem with this thing, should it feel fast? I punch it getting on the highway and there is a 2-3 second lag while you hear the turbo spin up and then it goes a bit better than my 5.3 suburban. Not much better though.
The LB7 is not going to break any land speed records stock, the LLY and the LBZ started getting bigger turbos that take less time to spool because they are a Variable-geometry turbocharger, the LB7 I believe has a traditional style charger that makes boost at a much higher rpm and takes longer to spool. Should be quick but not fast. I know that a lot of people really like these trucks and an intake is really not that big of a mod, a lot of people will do an intake just because they like the look under the hood or because they think it will make the truck faster. If the injectors are good, I say go for it or look for a 2004.5 that has an LLY motor.
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Old June 25th, 2013, 01:33 PM   #33
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What is better about an aftermarket filter vs a OEM style paper filter is stock or mildly modified diesel applications?
Well I did gain over 2mpg by putting the aftermarket filter in it. That's the only plus I found. But its worth it to me. I went from 13.7 city to 16.1city. So that's an extra 80+ miles per 32 gallon tank. But working on medium and heavy duty diesels professionally for the last 7yrs doesn't make me an expert. I do not drive my truck daily. More like once a week and on trips. I only put 28k on it in 3yrs. I am happy with my 03. I do think I got lucky with a good truck though.
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Old June 25th, 2013, 01:40 PM   #34
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Well I did gain over 2mpg by putting the aftermarket filter in it. That's the only plus I found. But its worth it to me. I went from 13.7 city to 16.1city. So that's an extra 80+ miles per 32 gallon tank. But working on medium and heavy duty diesels professionally for the last 7yrs doesn't make me an expert. I do not drive my truck daily. More like once a week and on trips. I only put 28k on it in 3yrs. I am happy with my 03. I do think I got lucky with a good truck though.
Ive put 23k on mine since January 2nd

I really need a second vehicle!
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Old June 25th, 2013, 05:24 PM   #35
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Quote:
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Well I did gain over 2mpg by putting the aftermarket filter in it. That's the only plus I found. But its worth it to me. I went from 13.7 city to 16.1city. So that's an extra 80+ miles per 32 gallon tank. But working on medium and heavy duty diesels professionally for the last 7yrs doesn't make me an expert. I do not drive my truck daily. More like once a week and on trips. I only put 28k on it in 3yrs. I am happy with my 03. I do think I got lucky with a good truck though.
I am no expert I just feel reduced filtration for a possible 2mpg isn't worth it for me. Also an oiled filter on a forced induction motor is just stupid. No discussion no opinions just fact.
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Old June 25th, 2013, 05:57 PM   #36
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Over on duramaxforum.com, a lot of those guys like the S&B Dry cold air intakes. Mine is still stock and will be replacing the the air filter with a new stock one soon. They claim the stock intake on the duramax is good for around 500hp and 550hp if you do the air intake mod(remove front plastic part from air box).

And as stated, duramax owners remove the 'engine cover' and plug it to get a loader turbo with a deeper tone out the exhuast. I removed mine and plugged it due to the rubber boot cracking. Didn't really make a difference on my truck but its all stock.
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