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2000-2005 Discuss your 2000-2005 Bonneville SE, SLE, and SSEi Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 04-03-2007, 04:31 AM   #21
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Quote:
Originally Posted by gojo83
I am not going to complain alot here but the APN is the biggest waste of money I have spent on this car I will not buy from them again. go somewhere else. I have to completely take off the lim again to get that all to work right I am highly mad
Whoa, wait a second here. Out of alll the success stories with the APN, what happened here??
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Old 04-03-2007, 11:04 AM   #22
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Quote:
Originally Posted by gojo83
I am not going to complain alot here but the APN is the biggest waste of money I have spent on this car I will not buy from them again. go somewhere else. I have to completely take off the lim again to get that all to work right I am highly mad
In another thread you mention that you will explain what happened in a PM, but because so many of us recommend to others that the APN kit is the best repair option for the UIM, it is really important that we all know what problems there might be, so that we can alter our recommendations accordingly. That really is the purpose of these forums - to get this type of information out to everyone. So, I encourage you to respond publicly to help the greatest number of others with this common problem.

What went wrong with the APN stuff? And why does the LIM need to come off? Does this have something to do with the custom intake listed in your signature?
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Old 04-03-2007, 01:48 PM   #23
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Apparently, as gojo83 explained in a PM reply to me, the problem was that his APN kit only had one stovepipe, and that pipe only fits 95-98. It must be machined from a base diameter of .749" to .624" to fit in 99 and newer LIMs.

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Quote:
Originally Posted by bill buttermore

Thanks for explaining.

APN kits just recently started to be shipped with two stovepipes. You must have gotten one of the older kits that just had the reduced diameter stovepipe for the older 95-98 lower intake manifolds. Did you order it a long time ago? Showshock just got an APN kit with two stovepipes. Here is a picture of what is shipped in the newer kits.



This is discussed in this topic: http://www.bonnevilleclub.com/forum/...ic.php?t=74522

The APN stovepipe gives you an insulating gap of about .125". But your stock GM pipe will still provide you with a .065" gap AND a heat shield in the vulnerable EGR bore.

Another option is to take the .749" base pipe you got in your older kit and have a machine shop turn the base to .624" Then it will fit in your newer LIM.
Until the old stock is gone, it may be a good idea for those ordering APN kits with 99 and newer cars to call to make sure their kit will be shipped with both stovepipes.[EDIT: This is not necessary. All new kits are shipped with two pipes.]
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Old 04-03-2007, 02:22 PM   #24
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Quote:
Originally Posted by gojo83
I am not going to complain alot here but the APN is the biggest waste of money I have spent on this car I will not buy from them again. go somewhere else. I have to completely take off the lim again to get that all to work right I am highly mad
You can go somewhere else, but you won't find a better product for this application. And, you will most likely pay more for it.

The smaller, second APN stovepipe is a very recent (and welcome) development. The first kit we have seen with two pipes was shipped last month. Perhaps we were premature to suggest that all APN kits are now shipped this way, without considering that there might have been some older stock.

To check out this possibility, I called APN (their number is on their website) to inquire if all new 3800 UIM kits were now being shipped with two stovepipes. According to them, they are. They also said that if a piece (like the newer pipe) was missing, that they will be happy to replace it. But, to be fair, they need to know that something is wrong in order to correct it.

Because APN kits are shipped from only one point, we should be able to presume that all new orders will include both pipes.
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Old 04-03-2007, 02:32 PM   #25
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Apparently, gojo83 purchased his APN kit in December, before they were being shipped with two stovepipes.
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Old 04-03-2007, 02:50 PM   #26
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Thank you so much for the clarification, Bill.
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Old 04-03-2007, 03:39 PM   #27
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To add to the information. Recently a Dorman kit picked up by me on the fly for another member did have both stovepipes and more gaskets and pieces as well. These manufacturers are learning and including more in their kits as time goes on. Unfortunately if you get old stock..you get less parts.
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Old 04-03-2007, 04:05 PM   #28
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I'd recommend doing the lower at the same time as the upper since you already have it apart. The lower is not that much more to do and you might regret it later. Mine lasted until it had 308,000 on it and then it was the upper that started leaking externally. I had known for a while that the gaskets were going because of frequent oil analysis. My lower gaskets were not in good shape either. Surprisingly, my upper manifold was not melted as some I have seen. The stovepipe was almost completely stopped up and I used a new upper plenum and the newer small stovepipe. You won't regret doing both at once.
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Old 04-04-2007, 05:59 PM   #29
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ok I will give you all a final wrap up. I took the stovepipe to the machine shop and got it all installed. went back home and took the dremel out and smoothed the runners out and took all the area that were not uniform and disrupting the flow. I did not do much in the way of portiing mostly polishing. I will post some before and after pics when I get home but I can defenatily quicker. I was not trying and I spun the tires at a stoplight I couldn't do that before
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