If you seal the dipstick hole the oil may find an alternative route out.
Is this pressurised oil or splash? Is it the correct dipstick for that engine?
My '67 Midget had an early PCV valve which comprised a small metal pancake assembly on top of the manifold between the carbs. Inside was a rubber diaphragm. The hose from this went direct to the crankcase breatherlocated on one of the tappet chest covers. So by 1967 this was being done.
Images on line show a hose from the rocker cover which splits at a Y piece and each hose goes into the air filters.
You maybe need to talk to a TR4 engine expert. Try the TR Clubs?
Last edited by DaveW; 02/12/24 06:26 PM.
