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How to Clean Valves Without Removing Head – [SOLVED] 10 Easy Steps to Nail It!

Are you tired of trying hundreds of ways to clean the valves without removing the head? Nothing seems like working anymore to solve the valve problems.

As we all know, cleaning the valves with the head on can be very tricky in terms of execution. So, do your research well before jumping into the operation right away.

Don't get stressed. Because here we are to help you out with the step-by-step guidelines about how do you remove carbon buildup from valves? Let’s get started.

How to clean valves without removing head?

Engine valves can get all dirty and gunky. If you are worried about how to clean intake valves without the head removing procedure, then here are the steps to help you out:

Step 01:

Firstly, take all the precautions. This valve cleaning process requires the engine to be turned on. So, don’t forget to put on special gloves as nobody wants their hands to get burned.

Step 02:

Now start your engine. Then set the engine to the operating temperature which is 195to 220 Fahrenheit for most of the engines.

Step 03:

Then check the dashboard with temperature scaling to know whether the engine is at its operating temperature or not. If the scale shows that the temperature is in between C and H, then you are good to go.

Step 04:

Find the air filter cover near the engine and remove that to reach the MAF sensor. There will be a duct there to get access to the engine.

Loosen up the hose clamp from both sides. If any wing nuts exist, then remove that also for completing the air filler covers removal task.

Step 05:

Look for the MAF sensor between the airbox and the throttle body to locate that. Because the exact air-fuel mixture ratio is determined with the help of that sensor.

Step 06:

Then rev the engine to increase the speed of combustion. It has to reach approximately 2000 RPMs. You'll be needing someone at the driving seat while revving.

Step 07:

After that, now it's time to insert the straw of the cleaner into the PCV valve hose past the MAF sensor. Try to pick the best valve cleaner.

Be careful about setting the straw as you can easily mess up by spraying the cleaner in front of the sensor. If you don't pass the throttle, you’ll get a check engine light.

Step 08:

Now spray the whole can of the cleaner with 30 seconds breaks in between. The valve cleaner additives and properties will knock off all the gunk.

At this point, the engine can start stalling. In this case, pressing the pedal is the only thing you have to do.

Step 09:

After finishing the can, rev the engine 2 to 3 times over 2000 RPMs but not more than 3500 RPMs. Then keep the engine running at an idle speed for one minute before shutting down completely.

Step 10:

Lastly, turn the engine off and reinstall the air filler cover. To get rid of carbon buildup and residues completely, let the engine heat-soak for one hour.

In the end, take a ride for 10 minutes at a normal driving speed. Hope you'll have a lot more clean car intake valves after doing all the steps properly.

How to clean carbon buildup on valves: Dos and Don’ts

To avoid the direct injector valve cleaning service cost you should be aware of what exactly you need to do. So here are the do's and don'ts that you might mess up:



Take all the safety issues seriously

Don’t be irresponsible about wearing protection glasses and gloves.

Keep the engine running at the time of the procedure

Don't cross the operating temperature

Look for the location of the air filter to clean it

Don't lose anything that needs  reinstalling

Locate the MAF sensor and spray after the throttle

Don’t spray in front of the MAF sensor

Rev the engine to approx. 2000 RPMs

Don’t rev exceeding 3500 RPMs limit

Be attentive while spraying the cleaner

Don't trigger the error codes on your dashboard

Final verdict

Doing the cleansing operation detaching the parts can raise the valves cleaning cost. Because you might create a big mess while reinstalling all the parts.

So, knowing about how to clean valves without removing the heads can help you to save time, money, and physical effort.

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