Symptoms of Bad or Failing Intake Manifold Gaskets

The intake manifold gaskets are some of the most important gaskets found on an engine. Gaskets are the seals placed between engine components before they are assembled in order to provide a reliable seal. They can be made of paper, rubber, metal, and sometimes a combination of the three.

The intake manifold gaskets are responsible for sealing the intake manifold against the cylinder head(s). Apart from sealing engine vacuum, certain designs will also seal engine coolant. When the intake manifold gaskets have an issue, they can cause drivability problems and even engine overheating. Usually a faulty intake manifold gasket will produce a few symptoms that can alert the driver of a potential issue.

1. Engine misfires and decrease in power, acceleration, and fuel economy

One of the most common symptoms of an issue with intake manifold gaskets is engine performance issues. As the vehicle acquires mileage, the intake manifold gaskets may wear out and eventually leak. This can cause major performance issues, as the intake manifold gaskets seal engine vacuum and pressure. A vacuum leak caused by a bad intake manifold gasket can throw off the engine’s air-fuel ratio and cause engine performance issues such as misfires, a decrease in power and acceleration, a reduction in fuel efficiency, and even stalling.

2. Coolant leaks

Another symptom of a faulty intake manifold gasket is coolant leaks. Some intake manifold gaskets also seal engine coolant, and if the gasket wears out it may lead to a coolant leak. This may produce a distinct coolant smell, along with steam, and drips or puddles of coolant underneath the vehicle. Coolant leaks should be addressed as soon as possible, in order to prevent them from becoming a greater issue.

3. Engine overheating

Engine overheating is another symptom of a possible issue with the intake manifold gaskets. A coolant leak will eventually lead to engine overheating when the coolant level drops too low, however there are instances where overheating can occur without any visible leaks. If the intake manifold gaskets leak coolant into the intake manifold the engine may overheat as a result, without any visible external leaks. Any coolant leaks should be addressed as soon as possible to prevent the possibility of serious engine damage occurring due to a bad intake manifold gasket.

While a faulty intake manifold gasket will produce symptoms that quickly alert the driver of an issue, there can be instances where a leak is difficult to detect. If you suspect that your intake manifold gasket or gaskets may be having an issue, have the vehicle inspected by a professional technician from YourMechanic to determine if the gasket should be replaced.


Next Step

Schedule Vehicle Engine Mechanical Inspection

The most popular service booked by readers of this article is Vehicle Engine Mechanical Inspection. Once the problem has been diagnosed, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. YourMechanic’s technicians bring the dealership to you by performing this job at your home or office 7-days a week between 7AM-9PM. We currently cover over 2,000 cities and have 100k+ 5-star reviews... LEARN MORE

SEE PRICING & SCHEDULING

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Recent Vehicle Engine Mechanical Inspection reviews

Excellent Rating


YourMechanic Vehicle Engine Mechanical Inspection Service

Average Rating

4.9/5

Number of Reviews

141,457

Rating Summary
132,330
5,037
1,008
715
2,367
132,330
5,037
1,008
715
2,367

John

26 years of experience
670 reviews
John
26 years of experience
Ford Mustang - Car is not starting - Webster, Texas
This our first time using your mechanic and i am very impressed and grateful for this sort of outlet rather then having to go through the trouble of having to get an already non-driven condition vehicle to a shop and this more hassle free. John really came through for me today i was having a simple battery issue and while working on this vehicle outdoors in the 100 degrees texas weather, my thermostat housing exploded not from his mistake but just my luck, he actually took more time also looking and trying to fix it although he wasn't able to fix that issue he took his time out his business time to help me out when he was initially there and prepared for a battery issue. i always appreciate honesty when it comes to car maintenance. i will recommend john to anyone and will be using his services in the near future 
Porsche Panamera - Oil Change - League City, Texas
PROFESSIONAL AND COURTEOUS

Raymond

36 years of experience
201 reviews
Raymond
36 years of experience
Cadillac Brougham - Vehicle Engine Mechanical - Las Vegas, Nevada
Talent and passion for what you do in any field is critical, Raymond seems to have both. I have dealt with many Mechanics in my day Raymond is one of the best. Thank you sir.

Stacy

23 years of experience
243 reviews
Stacy
23 years of experience
Dodge Durango - Battery will not hold a charge - Atlanta, Georgia
Stacy was on time, figured out the issue quickly, and was very knowledgeable about the issue being diagnosed.

Kiri

19 years of experience
372 reviews
Kiri
19 years of experience
Dodge Ram 2500 Van - Brakes, Steering and Suspension Inspection - Philadelphia, Pennsylvania
Great job!

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

Related articles

Symptoms of a Bad or Failing Water Pump
Common signs include coolant leaks at the front-center of the car, loose water pump pulley, overheating engine, and steam coming from the radiator.
Symptoms of a Bad or Failing Crankshaft Seal
If your car is reaching high mileage or is experiencing oil leaks, it may be time to replace the crankshaft seal.
Is it Okay to Drive With Fluid Leaking?
No. No. Do not drive your car if fluid is leaking. Depending on the type of fluid that is leaking, you may be able to drive home from your location, or it may not be safe to drive at all...

Related questions

Engine overheats with new radiator, new thermostat and fan relay

It is normal for the lower hose to be significantly colder than the upper hose, but it should still be warm. The upper hose should be almost too hot to touch with bare hands, and the lower hose should be...

Bad smell in cabin..when driving the car.

Your car has what is called a cabin filter which filters the outside air as it comes in through the vents into your car. When these get dirty or clogged with debris, they can give off a very dirty smell....

I'm experiencing a steady drain of coolant. I'm not noticing any overheating, and keep topping up the level

Is there a large wet spot under the vehicle after it has been used? A puddle under certain areas of the vehicle may shed a little light on where to look for the leak. A technician can top off the...

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