Please start with the part number on your existing cylinder head or in your engine parts documentation. Compare it with the replacement cylinder head’s part numbers, engine model, and equipment application. If possible, include your engine serial number or variant information when asking us to help confirm the match. Similar engine names do not automatically mean the cylinder heads are interchangeable.

A bare cylinder head generally refers to the head itself, while a complete assembly may include fitted components. The exact contents vary by product. Please review the replacement cylinder head's description and package contents before ordering so you know which parts are included and which may need to be purchased separately.

Some products explicitly include a full gasket kit, while others do not state that one is included. For example, our cylinder head listings include a Yanmar 4TNV94L/4TNV98 cylinder head with a full gasket kit and a Komatsu 4D94LE-2 cylinder head with a full gasket kit. Please check the exact product title and description before placing your order.

Please don’t assume that similar engine models use the same cylinder head. Differences in engine configuration or production version can affect compatibility. Compare the listed part number and supported engine variants with your engine information. If you’re unsure, please send us the product link and your engine details for review.

Please follow the service procedure for your exact engine. The cylinder head and mating surfaces should be checked for cracks, damage, and warpage, with measurements compared against the manufacturer’s specifications. Also confirm the required gasket, fasteners, and tightening sequence. Inspection limits and reuse requirements vary by engine, so use the correct service manual or consult a qualified technician.