How To Change Spark Plugs In A 2010 Mercury Marquis

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How Do I Change the Spark Plugs on My Thousand Marquis?

A reader worries most changing spark plugs on a 2004 Grand Marquis. John Paul reveals if the "horror stories'' well-nigh changing spark plugs are true.

John Paul, aka "the Machine Physician,'' answers readers' car-related questions.

By John Paul

April 1, 2015

Q. I have noticed that Toyota has gone dorsum to the 1950'south, when oil filters, were merely the newspaper part that would fit in a canister that was bolted on the engine. My question is since the paper role costs much less to make than the spin-on filter why practise they cost so much?

A. This may exist a case of marking-upwardly on the toll of the filter. A bank check on AllData (the database that I use) shows the filter at $5.89. Using the same role number in a search on Amazon has a packet of iii Toyota filters for $15.95. The website RockAuto has afterward-market place filters that will fit your car with prices that range from $ane.95 to $11.00. My cars apply the spin-on style filter and I general pay most $five to $six each. Perhaps where you lot are buying filter are inflating the price?

Q. Is in that location any special procedure to change the spark plugs on a 2004 Grand Marquis? I take heard horror stories about serious issues when you try to alter the spark plugs.

A. You are not incorrect to worry. Many owners and adept technicians become surprised when the spark plug breaks without warning in the cylinder head. Hither is what I would attempt: Leaving the spark plugs in the engine for extended periods are more likely to upshot in bug. The engine needs to be cool when attempting removal of the plugs. If yous can start with a cold engine that was immune to sit overnight all the better. Loosen the plug no more than than i/iv plough and then spark with carburetor (carbon) cleaner. This will deliquesce the carbon and hopefully allow the plug to come up out. Tighten and loosen the plug several times, if the plug feels like it is binding terminate. If the plug does intermission Ford has an approved repair method using an insert that doesn't require cylinder caput replacement.

Q. I have a 2004 Cadillac Deville and I am unable to keep air in the tires. They are new tires, brakes and valve stems. This was all done to eliminate the problem. I take had the sensors checked past the tire manufacturer twice and even tried nitrogen – no assistance. I can't check tires myself and tire dealer said to bring the automobile in and they would cheque the tires for me. Information technology is impossible to get for more than 2 or three days without adding air. The check tire light is on most of the fourth dimension and when checked they are ordinarily low. One of the dealers took the tires off the rims, sanded the rims – did non help. I am at a loss as to how to solve this trouble.

A. This is fairly common as cars are getting older. The air is most likely leaking out either around the rim or through the rim. Some of these wheels get corroded around the edge where the tire bead seals to the rim. Other wheels actually become porous and leak but sometimes can be repaired by sanding the wheel and using silicone sealant. A permanent repair may be replacing the wheels with a new set.

Q. I heard you on the radio and y'all mentioned that y'all drove a Porsche 911 with all wheel drive but was worried about driving it. I never heard why, what was the trouble?

A. The Porsche 911, in this case the Targa roof all-wheel bulldoze is a phenomenal car to bulldoze, even during this past winter every bit long every bit it has appropriate tires. The problem is that even the snow tires were very depression contour and I was concerned well-nigh potholes and wheel and tire impairment. I did put in a request that one time the roads get amend I would similar a chance for a more than thorough route test.