gearbox oil e36 m3 evo
Moderator: martauto
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moggie
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hi guys,ive noticed a small oil leak on my gearbox [manual 6 speed m3]it looks like it been coming from the drain plug but im not sure how much it has lost so im going to give it an oil change,can anyone tell me which oil is best?
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nickso
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should be a sticker on the side telling you what oil to use.
'88 e30 328i M52 track bint.
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moggie
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it just says atf oil only
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bss325i
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Then ATF it is.
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moggie
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so there is no recommended brand, any will do? 
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Kos
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Opie oils will give you dealer options and after market options
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moggie
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Hi, had another look on further inspection it is not the gearbox which is leaking. Its coming from a flat headed type screw on the cast iron block of the engine, on the gearbox end, near the top. Does anybody know what this screw is for can it be taken out/resealed? Thanks in advance 
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jonnie
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That'll be the Constant Pressure Valve. Common problem, bit of a pain to fit, but do-able.