1987 Buick Grand National GNX.
3.8 engine rotation
You did not specify as to the year. If it does not have a distributor then the computer takes care of it.
on the side of the engine block below the heads around the middle..................... The answer above is not true , the Knock sensor is on the back of the engine block on the drivers side behind the coil pack close to the tranny .....
Arlington, TX
The Buick Grand National and GNX models were trim options for the Buick Regal vehicle. Production lasted from 1973 to 2004 and recently began again back in 2011.
Any engine can be turbo'd . If it is a 3.8 v6 you could find a grand national kit a modify( lower boost 7 max) to make it work. Would need to modify the ECM or use the grand national ecm.
It's located on the driver side in front of the rear wheel on the inside of the frame.
Buick Grand National GNX.
Depending upon the year, it could say Regal, or Grand National. Most 1986s will say Grand National on the title. 1987 is particularly confusing, some have it, some do not. The best way to confirm that you have a grand national and not a Buick regal Turbo is to check the build sticker on the driver door or the trunk lid. if you see a code "WE2" in all the option codes you have a real Grand National.
200
5x4.75 or Metric 5x120.7