Having problems with your 1999 Mercury Grand Marquis ?

My 1999 mercury grand marquis keeps throwing a plug. Mechanic says if it happens again I need to replace the whole head. Is this true?

Posted / edited by AnonymousUser on : 25-03-2019

Answers :

You install spark plug inserts in the head

There are at least three of those tools avail

Lots to read about that problem on the internet

It went on from 97 thru 03,some 7 years,then ford
came out with a 3 valve 5.4 v8 that had two piece
spark plugs & they broke off for years.

The heads were designed with not enough thread
in the heads for the plugs & ford didn't care to resolve

You can read for days on just about any vehicle problem
on any vehicle going back 20 years

You don't or I wouldn't be pulling heads on a 14 year old car
Repair Help & Product Troubleshooting for 1999 Mercury Grand Marquis

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