dykins Posted July 26, 2004 Report Share Posted July 26, 2004 My '63 SU carbed TR4 is fitted with a non-vented rocker cover and has a filler cap which is vented through a series of holes in the bottom. After a long run, there appears to be oil leaking from the base of the filler cap onto the rocker cover (and then covering the immediate vicinity with a mist of oil). This can be a bit of a pain to have to keep wiping it clean. Is this normal? I noticed lots of 4s at the International last weekend had vented rocker covers and a closed circuit system - but they all appeared to be on strombergs. Is the answer to change to a vented rocker cover? Quote Link to post Share on other sites
Ade-TR4 Posted July 26, 2004 Report Share Posted July 26, 2004 It is normal! If you want to change to a closed circuit you'll need to get a rocker cover with a vent tube by the carbs and get the later type of air filters with an input for the breather hose (or a PCV valve to the inlet manifold - I think). The other option, if getting rid of the oil mist is your only concern, is to get a later type rocker (vented) and run a tube to the underside of the car. Cheers Ade Quote Link to post Share on other sites
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