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 with pictures to follow. If you use the right tools it's a simple task which should take 15 mins max.

Parts

• Decent 10mm spark plug socket with inbuilt rubber plug gripper.
• Three 3/8 extension bars, one of which should be a 'wobble' type
• Feeler gauge set.
• 3/8 Universal joint to fit extension bars.
• Rachet handle.

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 unplugging it from the coil pack first may also help.

• Put your socket on your extension but leave the ratchet 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 ratchet 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 anti-clockwise to make sure its not cross-threaded, then tightening it up to tight and quarter of a turn or 25 NM

• Continuing 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 her up and make sure there are no misfires or sluggishness

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