Description
This is a New Timing Chain Tensioner for a MGA and MGB. The BN4 to BJ8, MGA and MGB timing chain tensioner maintains the correct tension on the timing chain that will keep the engine crank and camshaft timing constant. Overtime the small hydraulic hole in the chain tensioner for the MGA and MGB can get plugged up so the correct about of pressure will not be applied to the chain. And if the correct amount of pressure is not applied you will hear rattle or rumble in your MGA or MGB that change with engine speed plus the relationship of the crankshaft and the camshaft will not be constant resulting in poor performance. Every time you change the timing chain this tensioner should be replaced too. Cross Ref.# 021-368, 12H3292, 460-560, 60005