The single row timing chain is a weak link on a 948 engine. This kit includes a cam and crank dual sprocket pulley to convert from a single row to dual timing chain. Also included is the absolute best dual timing chain we could find to fit the new gears. This is a great solution to reduce the chances of timing chain noise on your 948 engine! There is no tensioner integrated into the A series engines so we recommend this kit if you want hassle free operation down the road.
A smart upgrade for all engine rebuilds!
This kit will also fit 1098 and 1275 engines.
If you do this upgrade on a 948 engine, the sprockets will hit two bolts mounted on the front plate of the engine. Simply remove these bolts and replace them with flat head machine screws to afford more clearance. This is how we address this issue when building engines at our shop.