URO C30431 Engine Camshaft Plug

Engine Camshaft Plug for Jaguar Applications

The URO C30431 engine camshaft plug is an OE-style replacement for Jaguar engines that need a reliable seal at the valve cover and head interface. It is built with NBR material and a black finish to help resist heat and oil exposure in demanding engine environments.

Compatible With 1969-1971 Jaguar XJ, 1973-1979 Jaguar XJ12, 1976-1995 Jaguar XJS, 1988-1997 Jaguar XJ6, and 1994 Jaguar XJ12. This part number, C30431, is also referenced as URO-005166 for the same application.

Key Features

• OE-style plug profile for proper compression sealing
• NBR seal material resists engine heat and oil degradation
• Helps replace hardened or cracking camshaft plugs
• Designed to reduce vacuum leaks caused by worn seals
• Black finish with a nominal diameter of 1.011 in. (25.7 mm)
• Closed end diameter: 1.011 in.; maximum expansion: 0.427 in. (10.8 mm)
• Height: 0.495 in.

Detailed Description

URO C30431 is an engine camshaft plug made for Jaguar engines where the original plug has become brittle, hardened, or cracked. When the seal loses its shape, vacuum leaks can develop and engine performance can suffer. This replacement uses an OE-style profile and seal durometer to maintain the correct compression seal between the valve cover and head. The NBR construction is selected for resistance to oil and elevated engine temperatures, making it a practical choice for Jaguar XJ, XJ6, XJ12, and XJS service work.

Common Issues This Part May Address

• Vacuum leaks from a cracked camshaft plug
• Oil seepage around the valve cover and head area
• Loss of sealing from hardened original rubber
• Engine performance issues related to intake air leaks
• Fitment problems caused by worn or distorted plug material

Installation Notes and Tips

Inspect the mating surfaces on the valve cover and cylinder head before installation. Remove any old seal material, oil residue, or debris so the plug can seat evenly. Confirm the plug dimensions match the original part before installation, especially on Jaguar XJ and XJS engines where sealing surfaces must align correctly.

Quality Assurance

URO C30431 is backed by a 24 month unlimited mileage warranty. The part is manufactured with high-quality materials and is intended to provide a direct-fit sealing solution for the listed Jaguar applications.