Embarrassing question. Spark plug removal.

On my 'M' reg 1800 Mondy they just pull off. However a couple of them are very hard to pull off...the little spring clip must hold the plug v. tight.

Thanks for the answer. Ok, I'll down some spinach and give it another go. The fact that they are set down in a groove means that it's difficult to get a grip on the plug.

They can get very tight- the rubber boot gets stick to the plug insulator- you;ll see why when you get them off.

Don't pull on the cable itself, you'll break it. I have found the best tool on these is a plumbers adjustable wrench to grip the circular base and lever against the cam cover.

Do not tighten the new plugs too much- an 1/4th turn from hand tight is all you need, and re-gap the new plugs from 1.3 mm down to 1.0 or 1.1mm, which gives the HT leads a better time.

If your leads are more than about 50k old its time for replacement anyhow, they are considered a wearing part on the Zetec-E engine. Only Motorcraft or Bosch are good enough.

Tim..

Thanks for that Tim, I didn't realise that the leads would need to be replaced too. It's at 110k and I'd doubt that the previous owner changed them, so I guess it's about time :-)

That's interesting about renewing HT leads. My Mondy is on 150k and I got it at

Good luck with those plug boots

The classic signs are misfiring when hot at 1500-2500rpm under load. In nearly all cases if you look at the leads you'll see lots of little pin pricks and tracking marks on the plug boots and / or lots of brown 'spiders-webs' along the leads themselves, usually always on plug 4 or 3.

Tim..

Give it a good wrench, you 'ol limp wrist.

================================ Ted Rubberford. The Man In The Rubber Suit..