Get your faulty gas cap inspected at your home or office.

Our certified mobile mechanics come to you 7 days a week between 7 AM and 9 PM.

Estimate price near me

Service Location

Customer Ratings

(4)

How A Diagnostic Works

Instantly book a certified mobile mechanic to come to you

Mechanic diagnoses the problem and quotes necessary repairs

Your vehicle is ready to go

Fair, upfront & transparent pricing for all services

Our certified mobile mechanics can come to you now.

Customer Ratings

(4)


Gas cap won't come off Inspection Service

A stuck gas cap isn’t the most dangerous or difficult car problem to have, but it’s one of the most frustrating. You can’t put gas in your gas tank if you can’t get the gas cap to come off. It seems improbable that the cap would just get stuck, but it does happen. When it does, you’ll want to call a mechanic rather than trying to force it open.

How this system works:

The gas cap and gas tank is a very straightforward system. The gas cap has outward thread (like a bolt), while the head of the gas tank has inward-facing threading (like a nut). The gas cap screws into the top of the gas tank, which keeps the gas securely in the tank, and keeps debris from contaminating your fuel tank. When you are at the gas station and ready to fill up, the gas cap easily unscrews so that you can top off your fuel tank.

Common reasons for this to happen:

There are three common reasons why your gas cap might get stuck on:

  • Vacuum sealed: Under certain conditions, your gas tank can create a vacuum-like seal around the gas cap, which seals the cap tight. This vacuum situation occurs when the pressure inside the gas tank changes, which can happen due to extreme changes in weather or altitude, among other things. This high pressure situation creates a vacuum seal that makes it nearly impossible to unscrew your gas cap.

  • Poorly threaded cap: Be it out of haste or simply not noticing, sometimes people screw on their gas caps incorrectly. If the thread does not match up, you can sometimes force the cap on, just like you can force a glass jar lid on even when you’re not screwing it on correctly. If this happens with your gas cap, it can be extremely difficult to get off.

  • Debris in the threading: If dirt, leaves, or any other form of debris contaminates the gas cap and gas tank threading, the cap can easily get stuck. This debris can get trapped in the threading, creating extra pressure and friction, making the cap resist that much more when you try to unscrew it.

What to expect:

A top-rated mobile mechanic will come to your home or office to determine the cause of the gas cap that won’t open, and will then provide a detailed inspection report that includes the scope and cost of the necessary repairs.

How it's done:

A mechanic will use a specialty wrench to help unscrew the gas cap. After the cap is off, the mechanic will determine what the cause of the problem was, and repair or replace any damaged parts.

How important is this service?

If you can’t get your gas cap off, you have a limited distance that you can drive. You never know when you’ll need your vehicle, so it’s never a good idea to be stuck with a finite number of miles. You should have your gas cap fixed the moment you notice that it’s stuck, so that you can rely on your car anytime that you need it.


Recent Gas cap won't come off Inspection reviews

Excellent Rating

(4)

Rating Summary
4
0
0
0
0
4
0
0
0
0

Kenneth

20 years of experience
777 reviews
Kenneth
20 years of experience
Toyota Paseo L4-1.5L - Gas cap won't come off Inspection - Long Beach, California
Thank you Kenneth for all the valuable information and helping me out with my locked gas cap. I look forward to using your services in the future.

Martin

29 years of experience
166 reviews
Martin
29 years of experience
GMC Envoy L6-4.2L - Gas cap won't come off - Hermitage, Tennessee
Very professional and knowledgeable of what he was doing. I have used Your Mechanic before, first time with Martin. I would definitely use and recommend Martin for any other problems I have with my vehicles. He solved my problem very quickly and explained what had happened.

Edmar

22 years of experience
246 reviews
Edmar
22 years of experience
BMW 330Ci L6-3.0L - Gas cap won't come off - Bedford, Texas
Excellent

Ronnie

30 years of experience
105 reviews
Ronnie
30 years of experience
Mazda 5 L4-2.5L - Gas cap won't come off - Nashville, Tennessee
Great

Recent articles & questions

A Buyer’s Guide to the 2012 Chevrolet Corvette
The The Chevrolet Corvette is an American original that has stood the test of time. With the 2012 version, you’ll discover improved handling and horsepower that delivers the superior performance you’ve come to expect from this icon. With options as...
Rules of the Road For Georgia Drivers
Even Even though many of the driving regulations are similar from one state to the next and are based on common sense, knowing the rules in your own state doesn’t mean you know them in others. If you are planning...
What are the Car Pool Rules in Alaska?
Car Car pool lanes are frequently found on Alaska’s freeways, and greatly assist drivers in a number of different ways. While driving in Alaska may be better known for the rural, scenic drives (https://www.yourmechanic.com/article/top-10-scenic-drives-in-alaska), it’s the freeway commuting that the...

Car dies, goes into safe mode after I jump the battery.

While you may be jumping your battery correctly, your Audi A3 is equipped with an immobilizer that keeps the vehicle from being started without use of the proper key programmed for the vehicle. What you are describing sounds like a...

Belt squeaking

I believe for your vehicle there is only one drive belt. The serpentine belt is kept tight via the use of an automatic tensioner. If the belt is squeaking, the tensioner needs to be checked before the belt is replaced...

Check Engine code p0016

Hi There, As you know, code P0016 relates to the camshaft position sensor. It sounds like the sensor may not have been replaced or is still producing the same problems that one typically will produce when it is not working...

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