1986-1993 Volvo 240 Spark Plug Wires Replacement

Replacing the spark plugs in your SOHC inline-4...

iFixit Library 1986-1993 Volvo 240 Very easy 15 minutes Guide 9209

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Guide overview

Before you begin

Replacing the spark plugs in your SOHC inline-4 engine may be one of the quickest and easiest ways to provide a nice tune up for your Volvo 240. There is no real need to replace spark plug wires unless one breaks or fails, so see your manufacturer's service manual for recommended replacement intervals. Misfiring or a rough idle may be signs of one or more bad spark plug wires. There are many aftermarket companies who manufacture spark plug wires that promise to increase performance and fuel economy. However, the most reliable and longest-lasting wires are usually OEM wires from the car's manufacturer. Factory spark plug wires can go hundreds of thousands of miles before requiring replacement.

Step 1

Repair step

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To avoid any confusion between which wire goes to which spark plug, replace spark plug wires one at a time. You may want to mark either the old or new wires to remind yourself which ones you've changed.
Disconnect the spark plug wire from the distributor cap by pulling it straight up.

Step 2

Repair step

⌕

Gently twist the spark plug boot back and forth and pull up to remove it from the spark plug.
When installing your new spark plug wires, it's a good idea to apply dielectric grease to the spark plug boots to prevent the electrical connections from being damaged by water or debris.