November 11, 201213 yr Hi can anyone tell me what these nuts are allen key or what ? There recessed and I can´t see what it is as theres a lot of rust etc.
November 12, 201213 yr 7 mm is not generally a standard size. in car accesory shops you may find a 7mm key sold for removing brake calipers on a lot of German cars. If they are already rusty you must use a good fitting key or you will end up drilling them out which gets expensive. In Motion sells new nuts.
November 12, 201213 yr The sleeve nuts are 7 mm. Since it is most likely that they haven't been removed in the past 30 years, soak them for a day in penetrating oil before you attempt to remove them. If the allen wrench rounds off inside the nut you'll have to drill them out. Hopefully you will not have to do that. Sometimes an impact wrench will help break them loose. Torque the sleeve nuts to 11 to 15 ft. lbs. and the cylinder head nuts to 21 to 25 ft. lbs.
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