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1991 Lincoln Mark VII LSC spark plugs and wires

How to change spark plugs and wires on 1991 Lincoln Mark VII LSC? Are special tools needed?

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You don't have to worry about a special tool if you are replacing the wires but you will need a 5/8 socket with a rubber boot and an extension and maybe a swival to remove the plugs if there is an auto zone near by they will print you out a diagram for free

Posted on Jan 09, 2009


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Lincoln Mark VII Maintenance & Repair Questions - CarGurus > Questions > Lincoln > Mark VII
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Sep 08, 2015 | 1992 Lincoln Mark VII

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Where can you get a manual for rebuilding a transmission for a 1991 lincoln mark VII LSC? Its a aod automatic fourth gear is no longer working.Is there somewhere on line you can download the manual?

My friend, manuals are available at your public library or at your NAPA dealer or other fine auto parts stores or a dozen other places on and off line. You are free to search for the manual if you like ... you don't need me to do that for you, experienced transmission mechanic that you are. You might want to look at

Good luck to you on your project and thanks for your interest in

Feb 25, 2010 | 1991 Lincoln Mark VII

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Fuel tank needs to be cleaned. Does the Mark VII LSC have to have something removed prior to dropping the tank.

Yes. First drain tank as much as possible. Then support tank, Remove Tank straps , filler neck connector. Then unplug fuel pump/sending unit wireing, and fuel line(s). after dropping tank a foot or so.

Dec 07, 2009 | 1989 Lincoln Mark VII

1 Answer


Washed the engine. . All you can do is give it time to dry really. If you have no spark you got an electrical connection wet. You can go through and try to unplug stuff and blow it dry. That's about it. Needs time to dry out. Hope it helps.

Jun 27, 2009 | 1988 Lincoln Mark VII

1 Answer

1991 lincoln mark vii lsc runs but not when let the key go back t

its the ignition switch. inside the steering column. at the local parts store. not to expensive part. good luck

Mar 12, 2009 | 1991 Lincoln Mark VII

1 Answer

Starter or solenoid only

if you here click when trying to start a somewhat strong click then the solenoid is good check cable on side going to starter if tight starter would be the problem.

Jan 29, 2009 | 1991 Lincoln Mark VII

1 Answer

1991 Lincoln Mark VII LSC spark plugs and wires

A pair of decent long handled pliers/plug boot remover are recommended. apart from that, maybe some swivel pieces for the plug socket to get at funny angles.

recommend you:
- buy decent wires & plugs.

-put a dab of silicone on every wire boot to ensure easy fitting.

-Be verycareful when tightening the plugs so as not to crook the socket and crack the porcelain on the plug.

-Plugs should have a dab of copper grease or similar on the threads

-Plugs do not nee to be super tight, they have a compression washer at the base of the threads or a tapered thread fit that seals them well. only tighten them with a short length 3/8 ratchet not a big 1/2 inch - you'll strip the thread and regret that forever.

-Always make sure the wires dont touch the exhaust manifold and make them look like you just bought the vehicle, nice and straight and in tidy rows. You'll need a flat screwdriver, short, to undo enclosed plug wire harness mountings. be patient, they do unfasten ok once you suss em out.

-plugs are usually already correctly gapped. check them. gap can be check with Autozone or where u get the plugs from.Note the gap may be brand dependant - bosch platinum take a different gap to cheapo champions....

Hope you get a good job done

Jan 07, 2009 | 1991 Lincoln Mark VII

1 Answer

Leak in radiator reservoir and change spark plugs and wires

The plug change I already answered. hope that was enough...although a thought I just had was that some plugs have to be removed thru the wheel arches after removing the tire and inner protective shroud. I cant remember for your vehicle if thats one of the methods, you'll soon find out when u attempt removal of the old plugs.
BTW if you cant seem to get to one, do all the wires and other plugs and get a local mechanic to do the hard one. Dont be tempted to leave one crappy old plug in there you;ll undoubtedly get a large bite in the *** later on for that believe me. I aint done that but I have had to repair vehicles that had that old plug stuck in the rear of a V8 misfiring like hell.......
The coolant leak is not a big problem in the reservoir but if you can see it and/or get the reservoir off easily, I have fixed these a few times by drilling the leak hole round, then screwing in a self-tapping screw covered liberally in gasket ATV or regular silicone (bathroom mirror sealer) the reservoir need to be empty or below the leak line and dry so that the ATV/silicone will bond. A hot glue gun is also an ideal repair tool.
The problem with not repairing the leak is that the coolant pressure will not be right causing a change in the boiling point of the coolant, lowering the boiling point and reducing the cooling effectiveness of the coolant. This is a bit extreme for a small drip but under pressure that can turn out to be a real hisser....anyhow I probably overkilled this problem lol...hope u get it all done ok :)

Jan 07, 2009 | 1991 Lincoln Mark VII

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