Spark Plugs - Changing With UIM In Place

Changing Spark Plugs With UIM In Place

Background

I've noticed this keeps coming up in the V6 section so i've decided to write a Howto on it pictures to follow. If you use the right tools is a simple task which should take 15 mins max

Parts

• Decent spark plug socket
• 3/8 wobble extention bar (about 3" or 4" should do it)
• 8mm spark plug socket
• Feeler gauge
• Rachet

Short piece of garden hose (slides over porcelain top), to start new plugs in place, stops cross-threading them.

Procedure

• Set your spark plugs up to 1.3mm with the feeler gauge

• Start with the rear ones. First pull the HT leads off one at a time so you know which one goes where. It's cramped back there, so if you can't reach gently pull the lead with a pair of pliers - but don't grip it too hard because it's likly to damage the lead... For the one closest the coil pack unpluging it from the coil pack first may also help.

• Put your socket on your extention but leave the rachet off

• Lower the Socket and ext down the hole to the spark plug and make sure the socket meets the plug straight then connect your rachet to the ext.

• Gently unscrew the plug making sure the you keep it in alignment (other wise you stand a risk of breaking the porcelain top of the plug and you'll end up fishing )

• Refit the new plug giving it a few turn anticlock wise to make sure its not cross threaded, then tighting it up to tight and quater of a turn or 25 NM

• Contining in the same manner for the rear ones replace the HT Leads and Remove the 8mm bolts on black cover on the front bank.

• Replace front plugs - easy enough since you've got no access problems. You might have to remove the 4 8mm bolts securing the IMRC

• Reconnect HT leads and double check everything's back in place and secure

• Start here up and make sure there are no misfires or slugishness

Disclaimer: I'm not responsible for any errors in this guide or errors you make while following this guide. Any doubt don't be afraid to take it to your local garage

Submitted by beacherj