Spark Plugs 3.5
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From: Millbrook,AL
Spark Plugs 3.5
Can someone tell me how to chang the spark plugs in a 07 with a 3.5? I took all the bolts off the top (the black part) and that apparently did nothing, I can even see the wires or anything.. need some help.
Thread Starter
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Registered User
Joined: Sep 2010
Posts: 19
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From: Millbrook,AL
No all I did was take the bolts out. I noticed that there are 2 pieces to the black part, a top and a bottom. Do I have to seperate the 2 to get to the plugs? I'll try and take the whole thing off this weekend and see what I can do.
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From: Allen TX
Personally I haven't changed the plugs on the 2.7 or 3.5 engine.
I found a step by step :
1 Disconnect the negative wire to the battery. I did this to be safe.
2 Disconnect the oxygen sensor from the air intake. Do not pull from the wires only pull from the boot. Be careful not to break the sensor either
3 Pull the tube connected to the left side of the air intake off then remove the air intake.
4 Disconnect the map sensor and all other electric components that are attached to the manifold
5 Disconnect the cable that is connected to the throttle body (you do not have to take the throttle body off of the manifold to do this).
6 On the left hand side of the manifold there are 2 manifold support brackets loosen them up but do not take them off. When they are loose just pull the top part of the bracket that is connected to the manifold back and off the screws. .
7 On the right hand side of the manifold there is another support bracket that is connected to the throttle body. First take off the screws then where the support bracket connects to the cylinder bellow the manifold loosen the two bolts until you are able to slide the bracket out of the way.
8 On top of the manifold there are six bolts unscrew them.
9 Important! Before you remove the manifold to get to the spark plugs be very careful and remove the manifold by lifting it straight up and then pull it towards you slow. The reason for this is because there is a valve connected to the manifold directly in the back that you do not want to break. The tubes that are connected are long enough so you can take the whole manifold and place it to the right just out of the way so you can get to the spark plugs. (before changing the spark plug it is recommended that you take compressed air and blow away the dirt surrounding the spark plug area. This is done so that no dirt gets into the combustion chamber when you remove the spark plug.)
10 Once the manifold is out of the way disconnect the electric connectors that are attached to every spark plug. Pull them from the boot of the connector.
11 Repeat for all spark plugs - Unbolt the spark plug tube then pull it straight out and then with the spark plug socket unscrew the spark plug and replace it with a new one.
12 After the spark plugs are in on the left hand side of the engine in the back you will see a tube that says pcv. Remove the tube from the engine and unscrew the valve and replace it with a new one.
13 Put everything back and you are good to go.
I found a step by step :
1 Disconnect the negative wire to the battery. I did this to be safe.
2 Disconnect the oxygen sensor from the air intake. Do not pull from the wires only pull from the boot. Be careful not to break the sensor either
3 Pull the tube connected to the left side of the air intake off then remove the air intake.
4 Disconnect the map sensor and all other electric components that are attached to the manifold
5 Disconnect the cable that is connected to the throttle body (you do not have to take the throttle body off of the manifold to do this).
6 On the left hand side of the manifold there are 2 manifold support brackets loosen them up but do not take them off. When they are loose just pull the top part of the bracket that is connected to the manifold back and off the screws. .
7 On the right hand side of the manifold there is another support bracket that is connected to the throttle body. First take off the screws then where the support bracket connects to the cylinder bellow the manifold loosen the two bolts until you are able to slide the bracket out of the way.
8 On top of the manifold there are six bolts unscrew them.
9 Important! Before you remove the manifold to get to the spark plugs be very careful and remove the manifold by lifting it straight up and then pull it towards you slow. The reason for this is because there is a valve connected to the manifold directly in the back that you do not want to break. The tubes that are connected are long enough so you can take the whole manifold and place it to the right just out of the way so you can get to the spark plugs. (before changing the spark plug it is recommended that you take compressed air and blow away the dirt surrounding the spark plug area. This is done so that no dirt gets into the combustion chamber when you remove the spark plug.)
10 Once the manifold is out of the way disconnect the electric connectors that are attached to every spark plug. Pull them from the boot of the connector.
11 Repeat for all spark plugs - Unbolt the spark plug tube then pull it straight out and then with the spark plug socket unscrew the spark plug and replace it with a new one.
12 After the spark plugs are in on the left hand side of the engine in the back you will see a tube that says pcv. Remove the tube from the engine and unscrew the valve and replace it with a new one.
13 Put everything back and you are good to go.