Does the head need to be removed to fit o ring valve oil seals?
Posted: Tue May 21, 2024 1:02 pm
Do I need to remove the head to replace the old o ring valve stem seals?
I you are going to replace like for like - save yourself some time and effort and leave as is. The small 'O' ring seals are next to useless in stopping oil from going down the valve guide.
To do the job properly you need to remove the head and fit the later grooved valve guides to the inlet tracts. Then fit the efficient top hat seals. With unleaded petrol it is better that the exhaust valve guides do not have seals fitted as the valves run hotter and need all the lubrication they can get.
The parts required are available from ESM.