And to boot, the notorious lower intake gasket problem is just as big of a problem on the 60* V-6s. Two things complicate the lower intake job on a Montana van....
1.) Cramped engine compartment.
2.) Design of the lower intake gaskets on the 3100 and 3400.. The pushrods have to come out to gain access. That means the rockers have to be loosened. Enjoy:
GM still hasn't been able to correct the lower intake gasket issue on the 60* V-6s. My father-in-law has to replace his lowers on an 03 Grand Am. 65,000 miles.
IMO, I'll just stick with the 3800!