2002 Buick 3800

67 Post GS · 02-09-2025, 05:08 PM

I would go-ahead and replace the plastic upper intake all together. They will warp over time, and then you put a fresh gasket underneath and it will still leak. Dorman makes a replacement.

4speedracer · 02-15-2025, 11:24 PM

The Dorman intake used to come with a different internal EGR tube to get the heat away from the intake. OE configuration would damage the intake, sometimes leak internal and hydraulic the engine. Would suggest doing the lower intake at the same time, the general used plastic lower intake gaskets also replacements can be gotten in metal with rubber inserts.

02-09-2025, 05:08 PM	#1
67 Post GS Junior Member Join Date: Aug 2011 Location: Buffalo New York Posts: 79 Likes: 9 Liked 48 Times in 10 Posts	Re: 2002 Buick 3800 I would go-ahead and replace the plastic upper intake all together. They will warp over time, and then you put a fresh gasket underneath and it will still leak. Dorman makes a replacement.

02-15-2025, 11:24 PM	#2
4speedracer Junior Member Join Date: Sep 2011 Posts: 51 Likes: 0 Liked 10 Times in 6 Posts	Re: 2002 Buick 3800 The Dorman intake used to come with a different internal EGR tube to get the heat away from the intake. OE configuration would damage the intake, sometimes leak internal and hydraulic the engine. Would suggest doing the lower intake at the same time, the general used plastic lower intake gaskets also replacements can be gotten in metal with rubber inserts.