With lock down still in full effect and based on a conversation with someone who’s done this a number of times before… I thought I’d experiment with fitting a Positive Crankcase Valve to my 3.4 XK engine (utilising the existing crankcase breather outlet and a vacuum feed from the inlet manifold).
My aim here is to reduce the amount of oil passing through the rear (and possibly front) crankshaft seals. I think the theory goes, that by submitting the crankcase to a slightly negative pressure, when the engine is shut down oil is not ‘forced’ out of the seals or is greatly reduced.
The engine is in great overall condition - doesn’t use oil (but does leak it) has both good compression and oil pressure so I’m not trying to make up for poor rings etc…
Has anyone tried such a modification?