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Noob Series III Supercharged Question

W

WiderIsBetter

New member
Hi all, I'm thinking about buying my second Grand Prix. My first was a 92 SE w/3.4L Twin Dual Cam. Great car, made 240,000 miles then stop and go LA traffic killed the tranny. Motor was still strong. My question today is about the 2005 GTP supercharged. I've read that the intake manifold gaskets are prone to failure. I read the WIkipedia page on the 3.8L, and it says only the N/A series III have the improved aluminum gasket - are the Series III Supercharged motor still using the plastic or is Wikipedia misleading? Are they really prone to fail? Thanks!
 


2005.5 ish was the switch over to aluminum intake gaskets for all 3800's.

It's not that they are misleading, it's just not updated correctly.

You'll have to check the car out to see what it has, it may have already been replaced by now too because the car is 11 years old.
 
It's quite simple to change the gaskets if they are the plastic design, there's a few threads on it in the how to section.

And welcome to GPF.
 
Thanks, I'm still researching to see if there's anything else I should know before I scratch the check. Misleading probably wasn't the best word, just the way I read it, it sounded like they upgraded the N/A and not the supercharged, which would be weird.
 
WarStryker13 said:
It's quite simple to change the gaskets if they are the plastic design, there's a few threads on it in the how to section.

And welcome to GPF.
Click to expand...

Thanks for that - I found a video "Intake Gaskets in 33 Minutes". Thinking the obvious, I started the show. 6 minutes in, I stopped, because that was about a day's work for me! That How To section is extensive.
 
lim job is about a 4 hr job if you never did one before. once the fuel rail and the harness is unplugged its just nuts and bolts.
 


Thanks for all the input, but the GTP didn't make the cut. I fell for Bob (boring old Buick) instead. I got somebody's grampa's 2004 LeSabre Custom with the Series II N/A that really can't get out of it's own way. The upside was the mileage, 35K, and excellent condition. Since I'll probably need to replace those gaskets anyway, would supercharging this be easy?
 
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