I own a 1995 Buick Riviera Supercharged with 3800 motor.I recently went to do a tune up and while I was changing the spark plugs discovered it was impossible to gain access to the 3 rear plugs along the firewall.My question is how do you get to them? I went under the car with a light and found there was limited access around the cat converter,but its still pretty difficult gaining any clearance.Any suggestions? someone told me the engine has to be rocked forward at an angle....but I definitly dont want to have to do this just to get to 3 spark plugs.
Thanks