Valve Guard Lead Substitute
What is unleaded petrol doing to my engine?
Tetra-Ethyl Lead, although somewhat unfavorable to the environment, was an essential sacrificial lubricant and heat dispersant between the valves and valve seats to prevent Valve Seat Recession especially on the older cast iron and even some aluminum cylinder heads.
Many owners of older cars are unaware that VSR is an aggressive wearing process which often results in very costly head and valve repairs if not addressed correctly.
Valve Seat Recession occurs mainly on the exhaust valve where high temperatures (in excess of 800o C) combined with the constant impact of the valve on the valve seat result in a welding between the two surfaces breaking tiny particles from the seat to form an abrasive iron oxide globule on the valve. This abrasive action causes more and more wear until the valve recedes into the head leading to misfiring, loss of compression, valve train geometry misalignment and ultimately catastrophic damage to related components.
With the phasing out of LRP it is important to use a lead replacement additive such as Wynn’s Valveguard to act as a protective heat dispersing lubrication layer between the valve and seat.
Provides better valve sealing and is stable at high temperatures, it is a boundary lubricant not to be confused with the hydrodynamic upper cylinder lubes or valve train lubricants which will not protect against Valve Seat recession.