Every part that is found in your 1991 Volkswagen Jetta is really important. No matter how small it is, still they offer a remarkable role in making your vehicle run. The cylinder head bolt is among these small units that play one of the most important roles in your vehicle – keeping the cylinder head tightly sealed against the head gasket and the block as well. The cylinder head that is found in the engine works in providing a cover at the cylinder and the piston. Thus, this cylinder head bolt provides a tight fitting for the cylinder head and the cylinder head gasket. With such condition, you can actually imagine how these bolts suffer from great strength and loads. Just consider the intense combustion pressure that occurs inside which allows the cylinder to exert some pressure against the cylinder head and so with the cylinder head bolts that is in fact could be thrice as much as larger than the force exerted by the cylinder head alone. This means that the condition of the cylinder head bolt is critical. So this could probably the reason why failure to its condition likely occurs. Actually, the cylinder head bolts are considered as one of the most important and dangerous fasteners found in the vehicle’s engine system. So whenever you encounter some trouble with such, make sure not to ignore it. You should give it enough priority if you do not want to experience further trouble. But do not worry; we can help you find the best replacement from the products that we have. Our A3030-13947 Febi cylinder head bolt will surely comply with the needs of your 1991 Volkswagen Jetta model. Hurry, check this out now.