Does anyone have an idea what effect not having the breather plug in the
block on a closed system engine would have? I was under my car (66 TR4A
nearly finished restoration) this evening, and noticed some oil. The
hole in the block where the breather would be on an open system car is
plugged on the closed system. I just have the hole. I haven't driven the
car yet. The engine was rebuilt several years ago, but the car isn't
quite finished. I've started the engine periodically and let it warm up,
and it seems fine. I suppose I should install a plug???
Jerry Oliver
Olympia, WA
66TR4A 61
MGA 58
Jaguar
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