APN Intake Installed (Pics) - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 07-24-2007, 10:45 PM   #1
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Default APN Intake Installed (Pics)

...although considering it lasted 10+ years and 137,000 miles, I may have set a world record so I can't really complain.

I'm not even sure it'* failing really, but I have a very slow coolant loss that I can't really place. I had my water pump replaced last fall, so that isn't the cause. I'm losing about a pint a month (distance of about 1500 miles). I did notice coolant on the outside of the oil filter the last time I changed the oil (none present in the oil), which is also what I found when the water pump was leaking. I think it may be excess coolant from when I spill a little adding to the reservoir, but I can't really tell.

Anyway, I need to find where this coolant loss is coming from before I decide on my next course of action. First one I want to eliminate is plenum failure. If there is even one hint of failure I want to take the car out of commission now and take steps to protect it until I can either *TRY* to fix it myself or take it to a mechanic. I know one way to tell is to drain the oil and see if coolant is present (I have never found any coolant present to date) but the oil I use isn't very cheap, and I'd rather not drain it unnecessarily. Is there any other way I can tell that would give me a definite answer?

I also want to clean my throttle body, but I'll worry about when I find out more about this coolant loss. Quick question though, do you think someone with very limited car experience (biggest thing I've done is probably a thermostat change, or maybe the custom intake work) could do this? I'd like to, I'm not sure if it'* ever been done. My idle is fine, but it should improve my throttle response also?

Thanks for the information.
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Old 07-24-2007, 10:52 PM   #2
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at this point in time, I would be willing to bet you are due for the upper intake replacement and lower intake gaskets... It will run you about $250 if you do all of the work yourself

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Old 07-24-2007, 11:02 PM   #3
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I'd like to try, and I'd like to get it done just for the peace of mind. Unfortunately, I'm not sure I'd even know where to begin trying something like this. How recommendable would you say this is to try for a beginner? I have tools, probably not all I need but I can get them. I've read the threads on this, but reading and practice are two different things.

How long would this take for an experienced mechanic to do? I have a mechanic that cuts me a very good deal on labor rates (he charged me $30 to replace the alternator and belt tensioner on my truck) and if I can't do it myself, he'd be the first person to take it to.
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Old 07-24-2007, 11:03 PM   #4
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Default Re: The dreaded plenum failure may be in progress

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Originally Posted by LeSabreUltra
it lasted 10+ years and 137,000 miles.
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I would say it'* time to git r done!
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Old 07-24-2007, 11:09 PM   #5
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Quote:
Originally Posted by LeSabreUltra
I'd like to try, and I'd like to get it done just for the peace of mind. Unfortunately, I'm not sure I'd even know where to begin trying something like this. How recommendable would you say this is to try for a beginner? I have tools, probably not all I need but I can get them. I've read the threads on this, but reading and practice are two different things.

How long would this take for an experienced mechanic to do? I have a mechanic that cuts me a very good deal on labor rates (he charged me $30 to replace the alternator and belt tensioner on my truck) and if I can't do it myself, he'd be the first person to take it to.
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Bring it to me and we'll have it on the road again in no time...

I like to Say 4 hours... Its not that bad... I need to get a better write up on it... Its not as bad as it looks...

If the weather isn't too bad tomorrow I will be going into my motor for lifters... So everything will have to come off.. Not sure how quick i could get the write up done tho... I may have help too..

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Old 07-24-2007, 11:14 PM   #6
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That would be great, are you located anywhere near Alabama?

For four hours, my mechanic would probably charge me $200 tops, providing it'* not too bad. He works on a Bonneville constantly, though it is Series I powered. Even so, he knows what he'* doing...

I hate this because I love driving this car. At least when I get it fixed I won't feel so bad about putting miles on it. I always felt that each mile I put on it was one mile closer to having the upper manifold fail.
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Old 07-24-2007, 11:20 PM   #7
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I am actually in Central FL...lol

$200 would not be bad for labor at all..

You will want the new upper intake, and for the lower gaskets the Updated aluminum lower gaskets... The manifold end seals are different but will work fine on the older 3800 II engines

I'll make sure to get a series of Pics tomorrow so that you'll see what your getting into if you decide to attempt the work

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Old 07-24-2007, 11:25 PM   #8
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From east central Alabama (Auburn) it may make for a lengthy trip, sadly.

If the end seals are different, my mechanic should still be able to figure it out if I tell him beforehand? He knows what he'* doing, but I want to make sure.

I have plenty of time so I'd like to give it a shot, if possible.
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Old 07-25-2007, 09:35 AM   #9
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Quote:
Originally Posted by LeSabreUltra
From east central Alabama (Auburn) it may make for a lengthy trip, sadly.

If the end seals are different, my mechanic should still be able to figure it out if I tell him beforehand? He knows what he'* doing, but I want to make sure.

I have plenty of time so I'd like to give it a shot, if possible.
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We'll see what kind of Pics I can gather.. I went outside and was attacked by the Mean FL Bugs.... You should know exactly what I'm talking about

If you'd like to give it a shot, we'll do what we can to guide you in the right direction

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Old 07-25-2007, 10:03 AM   #10
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There are a bunch of write ups on this with pictures. While doing the upper..remember.. aluminum frame gaskets for the lowers.
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