What Can I Use As a Temporary Oil Cap? (Solution For Help)

The oil cap is essential to keep your car safe and reliable. The primary function of the oil cap is to prevent any impurities from getting into the oil. Without an oil cap, if you run your car, the oil will get contaminated, and the oil will fall.

That’s why to keep your engine oil safe, you need to use an oil cap. But over time, this oil cap may lose and be damaged. So if it’s damaged and lost, what can I use as a temporary oil cap, you may wonder. Please read on to know what you can use as an oil cap temporarily.

What Can I Use As a Temporary Oil Cap

Oil Cap Types

Here we will give some types of oil caps so that you can choose the right one for you.

  • Venter Oil Caps:

You can see on this oil cap a small hole in the center of this Venter cap. This oil cap job allows air to enter your oil system while pumping oil into the engine. Mainly, if your machine isn’t running, this oil cap helps the oil to return to the pan.

  • Flush Mount Oil Caps:

If you want an oil cap that offers permanent solutions, you can choose this flush-mount oil cap. Generally, it would help if you used this oil cap in the engine bay. Besides this, they can offer more security seals than other oil caps.

  • Recessed Oil Caps:

A recessed oil cap is an excellent alternative if you don’t want to spend money replacing a cracked one. It would help if you only had a small metal piece of plastic covering the recessed area. This will protect your engine from leaking and wasting oil.

What Can I Use As A Temporary Oil Cap?

Adequately, if your car doesn’t have an oil cap, you should cover the hole. It’s because to save your oil from residue and spillage, you should shut off the oil hole before driving. So as a temporary oil cap, you can use a rag or some other type of element to cover the hole. Even so, you can use a rubber band or zip to cover the hole in this place. Moreover, you can use duct tape on this hole. However, let’s learn how to use this alternative as a temporary oil cap:

A Rag And A Rubber Band:

  • Cover the oil filler neck opening with a clean cloth, then clean around the oil cap.
  • Take a clean cloth and put it over your oil-filled hole. Now take a rubber band and secure the cloth in place.
  • Make sure the rag is tight and secure so that no oil leaks. It is a rapid fix and will work in a minute.

Duct Tape:

  • First, clean around the oil cap. To do this job, wrap 2′ duct tape warp it over the hole, and ensure you have no gaps.
  • Press this tape down properly with your finger so that it’s sealed around the hole edges.
  • Now, put another duct tape piece on top of the first piece so that the previous layer is tight.
  • Nevertheless, you should warp around the entire perimeter with 3′ duct tape where you put previous tapes.
  • Finally, press this duct tape around correctly with your finger.

Important Note:

You should use all these methods as a temporary fix. It’s ideal to replace this oil cap with the right element immediately. And without an oil cap, don’t drive unless you have an emergency.

Danger Of Driving Without Oil Cap:

Driving without an oil cap allows the engine to become polluted with dust and debris. Undoubtedly, it can disrupt and destroy your machine, including your oil filter. For that, you will need to spend thousands of dollars on repairs.

In other words, the oil cap is crucial because it protects your engine and helps to keep the oil inside. Here below, we discuss it in detail about it:

Oil Damage

Accordingly, if you drive without an oil cap, the oil will fall down, and your car engine will run dry. Without enough oil, your engine can overheat and cause severe damage, such as deformed cylinder heads and cracked engine blocks.

Not only can it cause engine damage, but it can also cause an engine fire. Without enough oil, your engine will seize up and not work efficiently. A lack of lubrication can cause engine parts to wear out faster than expected, leading to breakdowns. Subsequently, it will lead to expensive repair of your engine.

Dirt and Debris Enter the Engine

Another problem that can occur if driving without an oil cap is that dirt and debris can enter the engine. Along with engine damage, dirt, and debris can cause your engine to become clogged.

Engine Explosion

Your engine can explode if it overheats. Because of pressure build-up, it can cause an explosion. And if you don’t use the correct oil cap, pressure can escape and damage your engine. Oil in the engine bay can be a severe fire hazard. This is why using good-quality oil caps is essential.

Blown Head Gasket:

An internal combustion engine has a head gasket located between the engine block and the cylinder head. Its purpose is to seal the cylinders and avoid coolant or oil leakage into the cylinders. A blown head gasket can cause oil or coolant leaks, overheating, and loss of power.

temporary oil cap replacement cost

Oil Cap Replacement Cost:

An oil cap is essential to keep your engine oil in place. An engine oil cap doesn’t undergo much wear and tear. Proper maintenance ensures your engine oil cap will last for your vehicle’s life. Unfortunately, if your car’s oil cap is damaged, you should replace it immediately to avoid possible engine damage.

The oil cap replacement cost depends on the vehicle make and model and where you have it done. A replacement oil cap generally costs between $10 and $30. Depending on the shop’s hourly rate and the complexity of the replacement, labor costs can add $50 to $100.

FAQ (Frequently Asked Questions):

Q. What happens if you don’t have an oil cap?

Without an oil cap, air can’t escape from your engine. Therefore, your engine inside will build up excessive pressure, which can lead to your engine exploding. You should permanently fasten the oil in place when you are driving. The metal cylinder itself can compress and dislodge from the piston. Plus, it can often cause severe damage to valves and other parts.

Q. How long can you drive without an oil cap?

Actually, without an oil cap, you can probably drive about a mile or two. In particular, the only problem is a massive mess under your engine inlet! Or if the engine is running at a standstill, you can notice a problem after 10 minutes.

Thus, you can drive a short distance without a cap, but you can feel something wrong far away. The only function of the cap is to keep the oil inside the engine. So, the oil will spit at the top of the machine. Don’t drive your car without an oil cap.

Q. Are oil caps universal?

No, they don’t. You can find oil caps in different fits, including push fit, bayonet fit, and threaded. Some have the recommended oil weight printed/stamped/molded on. Nevertheless, Everything else has a change, transfer, substitution, or replacement.

The size of the oil cap varies between models of each make. Likewise, it can also differ between the same models made at different times. If you need help determining which oil cap you need, it’s best to ask your auto mechanic for help.

Q. Can a missing oil cap cause a check engine light?

Yes. The oil cap seals the tank to maintain the engine’s pressure and oxygen levels. If the oil cap is left for a long time, the oil level can drop and can suck the air. In that case, the oil light and possibly the check engine light will come on.

Final Word:

On the other hand, this is the full blog post about what can I use as a temporary oil cap. Here we are trying to give a proper solution to your topic. After removing the oil cap, we suggest you always ensure it is firmly put back on. You need to put your cap in the proper place to find out when you will put it back.

Luckily, if you lost your oil cap, you can use a rag or rubber band as a cap. Lastly, We are trying to give a proper solution above this post. After reading this article, we hope you can solve your problem quickly.

Read Also: Why Did Engine Blew Oil Everywhere?


Emon is Lubricants specialist who studied on Petroleum Engineering in UAE. He have more than 10 years experience on different kinds of lubrication including automobile troubleshooting.