Thread: cutting down on valve burning

Originally Posted by hesguitar

We've got the 2.6l 6 and from what I hear it would be fair to assume future issues with burning exhaust valves- which got me thinking, the cylinder head re-conditioner we use at work taps into a coolant passage at the rear of falcon 6 heads (that tend to warp around cyl 5) allowing coolant to flow faster to reduce captivation and keeping the rear of the head cooler.

Has this method been tried before on land rover heads? If the head was already off to replace the valves and a blueprint was available it's a pretty easy modification.

As you know hesguitar, Falcon heads are all overhead valve, wheras the 2.6 landy engine has overhead inlet valves and side exhaust valves, so no amount of head modifications will reduce the incidence of exhaust valve burning.IMO one reason why they are susceptible to burning, aside from fuel mixture and clearances, is that the exhaust valves are just too small for the engine capacity.
However,a friend who used to rally a Rover saloon way back in the day, did have a great deal of success with stainless valves.as well as a significant reduction in oil consumption by plugging every second oil hole in the piston ring lands with grub screws.
Wagoo.

Originally Posted by Aaron IIA

It isn't strange then that my WWII Ford V8 had stainless exhaust valves from new. But you would want them with these engines, as to adjust the valve clearances you have to remove the valves.

Aaron.

If you think about the design of sidevalve v8s,they need all the help they can get re valves and cooling. The valves are inboard of the cylinders, so the hot exhaust gasses have to cross over through the block and coolant to reach the manifolds on the outboard side.I believe it was the reason that the Chevrolet CMP (Blitz) 4x4s were more successful in war time operations in hotter climates.
Wagoo.

Do you own either a Ford or Chevrolet Blitz?

Aaron.