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Frequently asked questions about cars and motorcycles

(Various brands) Various - Valve

Valve (Various brands) Various ( / )

(Various brands) Various
How to Test a PCV Valve Without Special Tools

Testing the PCV (Positive Crankcase Ventilation) valve is simple and does not require special tools. Start the engine and let it idle. Remove the oil filler …Read all…
Posted on 3 August 2026 by ScegliAuto
(Various brands) Various
How to clean the EGR valve

In this video we see how to clean the EGR valve with a specific product: When our diesel car emits excessive smoke and the engine does not run smoothly, a …Read all…
Posted on 22 April 2024 by ScegliAuto
(Various brands) Various
How to Restore the Valve Cover of a Car

The valve cover located inside the engine bay may require servicing over time, as it can wear and become damaged. Today, with the help of this video tutorial, …Read all…
Posted on 12 September 2026 by ScegliAuto
(Various brands) Various
If the car runs on three cylinders, it may be a valve sealing issue

This video demonstrates a method to check valve sealing if you need to verify whether one of the cylinders is not performing properly. The YouTuber is pouring …Read all…
Posted on 1 September 2026 by ScegliAuto
(Various brands) Various
Intake and Exhaust Valves: Things to Know

In this video, we finally learn why the intake valves are slightly larger - about 10 to 15% - than the exhaust valves. The intake valves do not need to be …Read all…
Posted on 7 August 2026 by ScegliAuto
(Various brands) Various
What Causes Engine Valves to Break?

Let's explore some theory, which is always interesting: why do the valves in our engine, whether intake or exhaust, break? Consider the cold adjustment (where …Read all…
Posted on 14 August 2026 by ScegliAuto
(Various brands) Various
How to Adjust the Mechanical Valve Tappets on a 106 1.1 Petrol

In this description and related video, measure and adjust the valve clearance. First, rotate the crankshaft pulley and align the groove with the zero point. …Read all…
Posted on 20 July 2026 by ScegliAuto
(Various brands) Various
How to Adjust the Valves of a Four-Stroke Engine

To adjust the valves in a four-stroke engine, you need to remove the cylinder head cover to access the pushrods and rockers. Locate cylinder 1 and consequently …Read all…
Posted on 5 July 2026 by ScegliAuto
(Various brands) Various
How to Remove and Replace Intake/Exhaust Valves

In this guide, you will find the general procedure and instructions to follow for removing and replacing the valves of a generic internal combustion engine; …Read all…
Posted on 22 June 2026 by ScegliAuto
(Various brands) Various
How Does a Wastegate Valve Work?

On a car with a turbocharger, the wastegate valve is essential to prevent damaging the turbo itself. This video explains it in a very simple and understandable …Read all…
Posted on 26 May 2026 by ScegliAuto
(Various brands) Various
Replacing Cylinder Head Valve Seals

Today, you will see the main steps to disassemble and replace the valve seals of a cylinder head. This operation is not very simple and requires a lot of …Read all…
Posted on 16 April 2026 by ScegliAuto

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How to Open a Stuck Boot on the Peugeot 407?

On the Peugeot 407, the boot may become stuck, possibly due to a problem with the control button or the lock actuator. In such cases, you can perform an emergency opening by following the simple procedure shown in this tutorial. First, open the rear doors, then lower the seat back by operating the release lever. Next, go inside the boot, locate the lock, and manually operate it using a flathead screwdriver. The boot will then be free to open.

Watch the video!


by ScegliAuto

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