How to Change the Spark Plugs on a 1998 Isuzu Trooper

Step-by-Step Guide

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   Step 1: Purchase appropriate spark plugs for your year model Trooper.

   For the 98' Trooper the spark plug gap is
   1.0 mm–1.1 mm(0.0394 in –
   0.0433 in). ,,,,,,,, Try starting with this spark plug as it is the most difficult to reach and if you can't get this one out, you may as well not continue., Spark plug socket must be connected to a universal joint and ratchet, for you to succeed in removing it. , Bring it out slowly and discard.,, Turn clock-wise to tighten spark plug.
   
   Be careful not to over tighten! ,,,,,
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   Step 2: Purchase anti-seize compound

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   Step 3: Park vehicle on flat surface and open hood.

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   Step 4: Allow engine to cool before commencing work

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   Step 5: Disconnect (-)negative battery terminal

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   Step 6: Remove plastic engine cover

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   Step 7: Spray small amount of WD-40 at each pair of screws that hold the six ignition coils/caps in place.

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   Step 8: Remove all ignition coil cap screws with 8mm socket

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   Step 9: store in a safe place.

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    Step 10: Starting with the furthest ignition coil near the master brake cylinder

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    Step 11: gently remove ignition coil tubing to expose spark plug.

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    Step 12: Carefully slide the 5/8 spark plug socket into spark plug chamber.

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    Step 13: Once you catch spark plug turn ratchet counter-clock-wise to release it.

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    Step 14: Apply anti-seize compound to thread of new spark plug and wipe access with towel.

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    Step 15: Inset new spark plug into socket and send down chamber.

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    Step 16: Reinsert ignition coil tubing/cap into chamber.

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    Step 17: Reinstall pair of screws and tighten firmly.

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    Step 18: Repeat this process for remaining spark plugs.

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    Step 19: Reconnect (-)negative battery terminal.

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    Step 20: Start engine to verify motor is running smoothly with newly installed spark plugs.

Detailed Guide

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