Good morning! The head gasket on my 1960 TR3a failed on Friday and I now have sludgy white oil. What's the best procedure to clean the engine of the fouled oil and the correct steps to rebuild please? Flush the cold engine now (if so how?) or wait until I've replaced the head gasket etc. run the engine with flushing oil (cheap 20 W50 perhaps?) after replacing the gasket and then drain and fill with good oil? Any advice most gratefully received Many thanks Andrew King Swanage Engine TS754