hi guys i have had this car for three mounths ihave just put restore in the engine to help with the compretion and it seems to have helped with starting i changed the oil and filter and for the last four weeks i could not fault the car until the other day it has developed a rumble from the driver side camshaft i have just removed the rocker cover and i have found the top camshaft chain slack i have removed the tentioner i will replace it but can anyone give any info regarding i dont know to much about this engine thanks for any help jim.