How do you change spark plugs on a 1995 Chevy Lumina?

Answer 1

Chevy Lumina Spark Plugs

• What you need to do on this automobile is to take off each pluge wire take a deep well 5/8 socket and two small extisions then turn to your left this will losend them on the front on the back of the motor you will have to lose your moter mounts on the front of the car the two black thing there are one bolt per side take them completely out then rock the motor forward then you will be able to get to the back spark plugs

• You may also access them by removing the alternator.

• Tilting the engine forward is a pain in the butt and risks breaking/stressing lines/connections. Still a pain, but easier, is removing the alternator. Disconnect the battery. Remove serpentine belt from the alternator by slacking back the tension pulley. Remove the front bolt on the alternator, tilt the alternator back to access the rear bolt. Once alternator is removed, access to the plugs is still tight, but you can reach behind the engine with the necessary tools (you will need extensions for your ratchet wrench) to get to the plugs. Just finished this job about 10 minutes ago. No wonder the car was missing on my 1990. Found gaps to be .055 - .075. For my year and model (3.1 sedan) gaps should be .035

• I just changed plugs on my 95, and I didn't have to remove or move anything. You will need the right length extension for the rear plugs. (possibly two short extensions together) I would recommend applying anti-seize to the plug threads before installing them. You might also want to change one at a time to avoid accidently mixing up the plug wires. This was a car with a 3.1 engine, other engines may be different.

• Changing spark plugs on Chevy Lumina 3.1 engines or similar: To do this job car must be in neutral. loosen motor mounts. Take bolts holding engine out. at the bottom of right motor mount is a guide hole. the front mounts should be loose so you can raise them. When rear bolts are out take a pry bar or facsimile pull motor forward attach bolt or facsimile to hole at bottom of the motor mount to hold engine in place. When finish installing plugs or whatever it is that you need to get this clearance. You do the reverse to get engine back in position. Remember car must be in neutral to do this correctly.

Safe yourself a load of time and trouble, plus about $300 dollars. Just remove the Alternator and the air filter and you will have all the access you are going to get even if you tried it from under side. But be careful with all the little electrical moduals and vacume hoses when removing the air filter. Oh, and one last thing about replacing the alternator belt. Look n the tention pully arm, and you will see a square 3/8 hole. Just put your 3/8 drive or socket in there and left until you can replace the belt..! If you are 71 and retired, this will get you abck in shape.