I've been pulling my hair out - and it hurts. I have a 1.7 O Series engine in my Roadster and it has been giving good service until..... I changed the distributor to an electronic version of the 48D4. I used to get oil in the main body of the old distributor (replaced unit) but not that much. With the new distributor, I get the best part of half a teaspoon-full after 50 miles or so. The shaft fits snugly in the housing and there is an anti-splash washer on the base of the unit to stop excessive oil dripping on the shaft. The only way I can think oil is being forced along the shaft is if there is excessive pressure in the cam cover. I'm now moving out of my comfort zone. I understand that if the engine breathing system is faulty an increase in pressure is likely but how do I test for this situation? Likewise I was wondering if worn valves or piston rings might lead to excessive pressure in the cam cover. For those not familiar with the 48D4, it fits horizontally into a circular aperture in the cam cover and a gear on the end of the distributor shaft engages with a worm gear on the cam shaft. I do need to resolve this problem because build-up of burnt oil on the contacts in the distributor cap has resulted in my ignominious return home on the back of a recovery vehicle ; the only up-side to this story was that the recovery mechanic convinced me the problem was a failed fuel pump! What do they know ! Thanks in advance for your thoughts.
Cheers Alan
Cheers Alan
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