3800 Series II Supercharged (L67) Question
04-19-2024, 03:39 PM
#1
3800 Series II Supercharged (L67) Question
Hello all. I've been looking into buying something with a Buick 3800 engine in it so I've been doing some research and have read that the NA Series II upper intake manifold is plastic and degrades around the EGR passage and can cause coolant to dump into the engine. I'm assuming that since the Supercharged Series II (L67) has the supercharger in place of the UIM that means it doesn't have this same issue? Are there any issues with the Series II Supercharged 3800 that are unique to it? Does the supercharged engine still have the lower intake manifold gasket issues like the NA engine does?
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CathedralCub (04-19-2024)
04-19-2024, 08:31 PM
#2
Senior Member
True Car Nut
Correct on the plastic UIM issue on the L36. The L67 won't have that.
Lower intake gasket sometimes has issues on those, but not often.
Lower intake gasket sometimes has issues on those, but not often.
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