MGB Engine Oil Consumption
MGB Oil Consumption.
An often overlooked reason for excessive oil consumption is the restriction or blockage of the engines crankcase breather system. With the “breathing” ability of the engine impaired it will expel oil from wherever it can – passed seals or forcing past the piston rings. As one of our group recently experienced after freshly rebuilding his engine it continued to use excessive amounts of oil. Cleaning out the engine breather provided an immediate fix much to his relief!
The MG Owners Club in the UK has some useful information about this (PDF File) - MGB Crankcase Breather (MGOC) – whilst they go to the extremes of opening the breather and replacing the gauze, I have found that removing the breather and leaving it to soak for a good length of time in a strip bath (such as an engine reconditioner would have) is quite effective in unblocking this. It should also be remembered that the later MGB oil filler cap has a breather in it and this should be replaced every 12,000 miles for the same reasons.
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