I have a 1953 MGTD that I have owned for 45 years. A few years ago I rebuilt the engine (with help from someone more knowledgeable) and had a problem with the head. It had a large crack in it forcing me to install a different head. The original head was for a newer MGTD with circular holes for antifreeze cooling. I was unable to find an identical head and the mechanic told me that an older head would work fine with the "banana-shaped" holes for cooling. Luckily I found a head on E-Bay and had it checked out by a shop that specializes in heads. The problem I am now facing is not knowing what "GAP" (lash) I need to set the valves. Should I set the valves at .012" or .019" ??????? .019" is for the older (banana hole) head up to engine 24115 and .012" is for the newer (circular hole) head after engine 24115. I obviously can't go by my engine number since the head is for an older engine.
Any suggestions are appreciated. I temporarily set them for .015" as a compromise.
Any suggestions are appreciated. I temporarily set them for .015" as a compromise.