What kind of gaskets does a Rover V8 have?
Rover introduced the composite head gaskets for the Rover V8 with the introduction of the 4.0 and 4.6 litre engines. These engines were fitted with an all new head design, which featured 28cc combustion chambers for specific use with composite gaskets, and 10 bolt head retention.
How many cylinder heads are in a Land Rover?
Rover also ammended the torque settings applicable to the cylinder head bolts on 14 bolt heads. (Ref….1997 Land Rover Engine overhaul manual covering 3.5, 3.9, 4.0, 4.2, 4.6 litre engines.)
What are the torque settings for composite gaskets?
Specifically, when using pressed metal gaskets, the outer row of bolts..numbers 11 to 14 the torque for these bolts is reduced to 44 lbs/ft where as for all others the torque is 66 lbs/ft. If using composite gaskets with 14 bolt heads, then these torque settings will also apply.
Why are the torques on a rover so tight?
In general, the torques specified by Rover were rather conservative and were designed to protect threads from a worst case scenario, this is why some will feel less tight than you might expect. However, these are the torques used for production engine build and have been proved to work so there should be no need to give it “a bit more for luck!”
Rover introduced the composite head gaskets for the Rover V8 with the introduction of the 4.0 and 4.6 litre engines. These engines were fitted with an all new head design, which featured 28cc combustion chambers for specific use with composite gaskets, and 10 bolt head retention.
Rover also ammended the torque settings applicable to the cylinder head bolts on 14 bolt heads. (Ref….1997 Land Rover Engine overhaul manual covering 3.5, 3.9, 4.0, 4.2, 4.6 litre engines.)
Specifically, when using pressed metal gaskets, the outer row of bolts..numbers 11 to 14 the torque for these bolts is reduced to 44 lbs/ft where as for all others the torque is 66 lbs/ft. If using composite gaskets with 14 bolt heads, then these torque settings will also apply.
In general, the torques specified by Rover were rather conservative and were designed to protect threads from a worst case scenario, this is why some will feel less tight than you might expect. However, these are the torques used for production engine build and have been proved to work so there should be no need to give it “a bit more for luck!”