Mercury LN7 Intake Manifold Gaskets Replacement at your home or office.

Our mobile mechanics offer services 7 days a week. Upfront and transparent pricing.

Estimate price near me

Service Location

Customer Ratings

(17)

Included for free with this service

Online Booking

Mechanic comes to you

12-month / 12k-mile warranty

Free 50 point safety inspection

Our certified mobile mechanics can come to your home or office 7 days a week between 7 AM and 9 PM.

Customer Ratings

(17)

Intake Manifold Gaskets Replacement Service

How much does a Intake Manifold Gaskets Replacement cost?

On average, the cost for a Mercury LN7 Intake Manifold Gaskets Replacement is $357 with $148 for parts and $209 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
1982 Mercury LN7L4-1.6LService typeIntake Manifold Gaskets ReplacementEstimate$548.80Shop/Dealer Price$644.76 - $883.12
1983 Mercury LN7L4-1.6LService typeIntake Manifold Gaskets ReplacementEstimate$523.80Shop/Dealer Price$621.80 - $861.70
Show example Mercury LN7 Intake Manifold Gaskets Replacement prices

What is an intake manifold gasket and how does it work?

The intake on an engine may be made up of a lower intake manifold and an upper intake manifold or plenum. The lower intake manifold is a cast aluminum or molded plastic chamber bolted to the cylinder head of the engine. The intake manifold must be tightly sealed to the cylinder head(s) using a gasket in order to prevent air, oil, or engine coolant leaks.

When to consider replacing the intake manifold gasket:

Internal or external leaks. Due to constant temperature expansion and contraction of engine parts or overheating, the gasket’s ability to seal properly can be ruined, resulting in problems such as:

  • Internal or external engine coolant leaks. In some applications, the manifold has cooling passages within. If the manifold seal to the engine fails, coolant can leak externally or even into the engine oil crankcase, where coolant can be noticed in the engine oil.
  • Engine overheating. If the leak at the manifold is a leak of engine coolant, it can lead to engine overheating. However, there are other causes of engine overheating, so a mechanic would have to determine the actual cause.
  • External oil leaks. On some 6 and 8 cylinder engines, the intake manifold sits atop an oil-lubricated area of the engine block. If the manifold gasket has failed, oil can leak from the block to the exterior of the engine.
  • Poor engine operation, lean operation, rough idle. Vacuum air leaks into the manifold due to a defective gasket that will upset the air-fuel ratio. The engine may run poorly.
  • Check engine light. Minor leaks at the intake manifold gasket will not usually cause the check engine light to illuminate. However, as a leak persists, it may grow larger and it possible for the leak to degrade engine performance enough that it will cause a trouble code to set, which will cause the check engine light to illuminate.

How do mechanics replace the intake manifold gasket?

  • Working on a cold engine, the engine cover is removed. If the intake manifold has internal cooling system passageways, the engine coolant is drained below the level of those passageways.
  • The accelerator cable assembly and cruise control cable are removed and set aside. All electrical connections and emission and vacuum lines in the way of the intake are removed. Ignition components, such as the coil, are removed as needed. If the car has an upper plenum, that is removed and set aside.
  • If the fuel rail is bolted to the intake manifold, the supply and return connections to the fuel rail are disconnected.
  • Once all connections to the manifold are clear, the manifold is unbolted and removed from the engine.
  • Aluminum and plastic manifolds are checked with a machinist’s straightedge to ensure the surface flatness does not exceed the original equipment manufacturer’s specification. If the surface of a manifold is not flat, the new gasket will not seal properly. Plastic manifolds are checked for cracks, heat damage, and warpage.
  • Once the manifold is deemed re-usable or replaced as needed, the new gasket is applied, the manifold is put in position and the mounting bolts are torqued with a calibrated torque wrench in the OEM specified sequence. In some applications, RTV sealant must be applied in corners of the mounting surface or specified hard-to-seal spots, per the service manual.
  • All removed components are then re-installed in the reverse of the above steps.
  • Finally, the vehicle is run and checked for leaks, and test driven.

Is it safe to drive with an intake manifold gasket problem?

Yes. The principal concern with a leaking intake manifold gasket is potential damage to the engine, depending on where the leak is. Although the vehicle will generally be safe to drive, you should schedule service as soon as possible to minimize the chances of additional costly damage. If the leak involves coolant, it could lead to engine overheating damage or the coolant could contaminate the engine oil, which can damage the engine bearings. If there is an air leak to the cylinders, it can cause lean operation which could overheat the catalytic converter.

When replacing the intake manifold gasket keep in mind:

  • In engines where coolant flows through the intake manifold, a leaking intake manifold gasket can be either the cause of or result of engine overheating. If you have a leaking intake manifold gasket, and the engine has overheated, the entire engine should be inspected for damage, such as a blown head gasket. The engine cooling system thermostat should be replaced because engine overheating can damage the cooling system thermostat.
  • Some car engine designs are more likely than others to experience leaking intake manifold gaskets due to material and design issues. Your mechanic can inform you if your car represents one of these cases. Many times a re-designed gasket, or altered installation technique and torque values, will be relevant to avoid a recurrence of any leaks. Mechanics will consult Technical Service Bulletins to determine if any unique circumstance exists for your car.

Fast and easy service at your home or office

Backed by 12-month, 12.000-mile guarantee


Meet some of our expert Mercury mechanics

Real customer reviews from Mercury owners like you.

Excellent Rating

(17)

Rating Summary
17
0
0
0
0
17
0
0
0
0

Luke

16 years of experience
138 reviews
Luke
16 years of experience
Mercury Grand Marquis V8-4.6L - Intake Manifold Gaskets - Saint Louis, Missouri
I am very pleased with my service. Job was completed quicker than expected.

AUDIE

33 years of experience
191 reviews
AUDIE
33 years of experience
Mercury Mountaineer V8-4.6L - Intake Manifold Gaskets - Las Vegas, Nevada
He is the best

Michael

29 years of experience
23 reviews
Michael
29 years of experience
Mercury Grand Marquis V8-4.6L - Intake Manifold Gaskets - Washington, District of Columbia
Keep up the good work

Russell

24 years of experience
356 reviews
Russell
24 years of experience
Mercury Sable V6-3.0L - Intake Manifold Gaskets - Gresham, Oregon
Loved Russell. He was polite, and got the job done.

Excellent Rating

(17)

Rating Summary
17
0
0
0
0
17
0
0
0
0
Number of Mercury Intake Manifold Gaskets Replacement services completed
187+
services done by our mechanics
TOTAL NUMBER OF EXPERT Mercury MECHANICS
600+
experts on our platform

Recent articles & questions

A Buyer’s Guide to the 2012 BMW 335d
Of Of all of the BMW 3-Series models available in this model year, the 2012 BMW 335d is one of the most powerful and subtlest on the road. This 4-dour sedan may look mild-mannered enough, but under the hood it’s...
P2237 OBD-II Trouble Code: O2 Sensor Positive Current Control Circuit/Open Bank 1 Sensor 1
What What the P2237 code means P2237 is an OBD-II generic code for the engine control module (ECM) detecting the O2 sensor for bank 1 sensor 1 and has an open circuit for the heater control circuit of the O2...
How to Replace a Steering Stabilizer Stop
When it's time to replace your steering stabilizer stop, you'll need to lift your car, disconnect the battery, and clean the mount brackets.

Manual transmission makes noises - 1994 Nissan D21

Hello. It sounds like you have a gear, bearing, bushing, or other rotating component issue caused by wear. At that mileage, really the thing to do is just simply rebuild the transmission which is not particularly difficult since it is...

i replaced the cluster and disconnected the battery. when i connected everything again the theft alarm was on and car doesnt start

Hello, thank you for writing in. The first thing we need to determine is if this is a stock alarm or an aftermarket that was installed later. There may be a technical issue with the alarm module itself. The keys...

How do I get my 2006 Chevy Silverado out of limp mode

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (855) 347-2779 · hi@yourmechanic.com