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Valve guides provide a precise contact surface between the valve stem and the cylinder head. Valve rubbers mounted on the valve guides prevent oil leakage past the valve stem. Whether you are performing maintenance or upgrading a high-performance vehicle, our valve guides, available in both cast iron and bronze, ensure the proper functioning of the valves in the cylinder head. At Wilmink Engine Parts, you'll find premium options from trusted valve guide suppliers like Freccia, Kolbenschmidt and MAHLE, as well as competitively priced Private Label alternatives. |
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A valve guide is a small but essential engine component that centers and guides the valve stem in the cylinder head, allowing it to move up and down accurately. It ensures that the movement of the valve is aligned relative to the valve seat, ensuring an airtight seal between the valve disc and the cylinder head. This seal is crucial in preventing compression loss. The material of a valve guide is composed in such a way that it prevents wear on the valve stem, thus extending the life of the entire valve train.
Replacing Valve guides requires skill and the right tools. First, the cylinder head must be removed from the engine, followed by removing the valves. Valve guides are pressed out of the head or driven out of the head with an appropriate impact.
Valve guides are supplied in fixed sizes and are ready to fit. Should the valve guide bore in the cylinder head be worn or damaged, it can be milled to a slightly larger size. For this purpose, guides are available in an oversize for many applications.
In some cases, heating the head and freezing the new guides can simplify installation. This procedure is often performed in conjunction with valve seat replacement. A final check for proper clearance and alignment and then the engine can be reassembled.
Valve guides are usually replaced when the guides are worn, burned, or damaged. Symptoms include misalignment of the valves, resulting in oil overconsumption and a poor working engine. Replacement involves removing the cylinder head, removing the old guides, and installing new ones. Replacing the valve stem rubbers during this process is, of course, necessary. It is also recommended to replace the valve guides when installing new valves, as this ensures long-term durability and performance.
Prices vary depending on the brand, material and application. Bronze valve guides are often more expensive than cast iron, due to their good self-lubricating properties. At Wilmink Engine Parts, we offer valve guides from Freccia, Kolbenschmidt and MAHLE, as well as Private Label options for every budget. Visit our web shop for current prices and availability.
At Wilmink Engine Parts we have high quality valve guides in stock from:
• Freccia
• Kolbenschmidt
• MAHLE
• SBI
• Wilmink Engine Parts Private Label
Browse all of our brands and filter by vehicle or part number to find the perfect match for your engine rebuild or repair.
Yes indeed, Wilmink Engine Parts offers high-quality valve guides for engines operating under high thermal loads, such as drifting or sport compact engines. Options are available for popular applications such as SBC (Small Block Chevy) and Honda engines. These guides are often made of sintered bronze and offer better heat resistance and lubrication, making them ideal for tuned or performance applications.
Oil leakage along the valve stem is often caused by worn-out hardened valve rubbers or excessive clearance due to worn guides. Just replacing the valve rubbers can help, but in many cases, it is necessary to inspect and replace the guides themselves. Using the right knowledge ensures a good seal and a reliable repair. Always inspect both the guides and valve rubbers when troubleshooting suspected oil leaks in the cylinder head.
Wilmink Engine Parts offers an extensive selection of valve guides and seals for almost every engine type. Whether you're looking for valve guides or expert product advice, you've come to the right place. With our focus on quality, compatibility, and fast delivery, you'll be well prepared for a successful repair or overhaul.
