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Old 02-11-2009, 10:38 AM
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Location: Middle Haddam, CT
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oily trigger points

My '73 4.5 is prone to fouling its trigger points with oil. These engines are apparently susceptible to this problem over time, but I don't know what I need to replace to cure it. I have replaced the "O" ring on the outer distributor shaft housing, but that didn't fix it. Any ideas out there?

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Old 02-11-2009, 11:57 AM
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Your crankcase may be pressurized due to blowby and insuffient crankcase ventilation. Just a thought.
Tony
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  #3  
Old 02-12-2009, 10:43 PM
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When you say distributor housing,are you referring to the o ring just above the gear on the distributor shaft ?? You'd have to pull the entire distributor to get access to it.
I tried a "generic" rubber ring but found it wasn't thick enough.Wound up getting the factory part for 3-4$
I had similar trouble with fouling on my early SL,but since getting a new o ring the problem has disappeared.
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Old 02-13-2009, 12:50 AM
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The ring seals the outside, not the inside of the distributor so a new one probably won't do much good.

Those 2 spots on the valve covers (1 on each side) have little wire "Filters" that you should clean every so often. I'd suggest doing so. Also make sure your PCV valve isn't frozen/gunked with age.
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  #5  
Old 02-14-2009, 09:55 AM
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Tomguy:
Is there an "O" ring or other sealing medium for the inner shaft? I could not drift the securing wedge out with reasonable force to separate the inner from the outer shaft. I didn't want to damage anything with excess force (past experience!). There did not appear to be excess play between the two shafts. The car only has 64,000 miles on it. Thoughts?

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Berfinroy in CT
Present vehicles:
1973 300 SEL 4.5
1959 Rolls Royce Silver Cloud I
1959 Ford Thunderbird convertible/430
Past vehicles;
1958 Bentley S 1
1976 ex-Max Hoffman 6.9
1970 300SEL 2.8
1958 Jaguar MK IX
1961 Jaguar MK IX
1963 Jaguar E-type factory special roadster
1948 Plymouth woody
1955 Morgan plus 4
1966 Shelby GT350H Mustang
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