how do you change the spark plugs on a 1991 q 45 infiniti
There are four spark plugs on each side of your 1991 Chevrolet engine. The spark plugs will be near the bottom of the engine.
To change the Spark Plugs on a Previa (1991-1996) you have to remove the passenger front seat, lift the carpet and then you will find a cover on the floorplate that has to be removed. Once the floorplate cover is off you will see the engine. There is also a small cover over the spark plugs and wires that has to be removed. The 2.4 liter petrol engine uses small 16mm spark plugs and a small 16mm socket will be needed to replace the plugs.
If you remove the air filter box, you will have plenty of room to access the plugs.If you remove the air filter box, you will have plenty of room to access the plugs.
In the engine... If it is a a straight six. They run in a row. follow the spark plugs wires to them.
You only set the timiming for engines with spark plugs, and diesels don't use spark plugs.
The 1991 Mercury Marquis spark plug gap is .034. Most spark plugs will be pre-gapped by the spark plug manufacturer.
0.35
.060"
.031 in
The first 3 spark plugs to the right are easy to change,the one on the left you have to loosen up the alternater to get to.
disconnect the negative battery cable remove the spark plug boots and make sure you know witch one goes where remove the plug use a 5/16 spark plug socket gap the new plugs to 0.041 in apply antisieze to the threads of the new plug apply a little silicone dielectric compound to the end of the spark plug lead install the spark plugs and tighten to 16 ft lbs put the boots back in annnnnnd your done.