I own an '03 Pontiac Sunfire. I was wondering if it would be possible to swap out the stock 2.2L Ecotec for the later model Sunfire GT 3.1L V-6. Will this motor bolt right up, or will I have to modify the engine mounts? Will it bolt up to the automatic transmission? If you have any suggestions for an easier swap or similar motor as far as performance I would also greatly appreciate the feedback.
Theo Wendt Hugo, MN
Anything's possible, but is it practical? Along with the Chevrolet Cavalier, Pontiac's Sunfire is a member of GM's third-generation J-body. Only four-cylinder engines were factory-installed in these cars. The '96-'02 Sunfire GT used the 2.4L (146ci) RPO LD9, a DOHC Quad-4 variant with twin balance shafts rated at 150 hp and 155 lb-ft. In '03, the Ecotec was introduced: Your 2.2L (134ci) Ecotec variant carries a 140hp/150 lb-ft rating.
RPO LG8 (VIN J), the modern version of the 3.1L (191ci) 60-degree V-6, is found in larger cars, typically the '00-'03 Pontiac Grand Prix SE and Chevy Malibu, the '01-'02 Chevy Lumina, and the '00-'05 Buick Century. Rated output ranged from 170 to 175 hp and 190 to 195 lb-ft. Although a solid, dependable grocery-getter, the pushrod 3.1L V-6 is nothing to write home about; the DOHC Ecotec has much more performance
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