OIL Leak Stopper

Post by **plg422d** » Sat Mar 29, 2008 4:50 pm

I have an oil leak from the rear crankcase bearing. Has anyone used an oil leak stopper product successfully? If so any recommendations?

Thanks

Post by **MoggyTech** » Sat Mar 29, 2008 5:28 pm

Waste of money, they are all 'snake oil'. If this is a standard engine the rear crank seal is of the scroll type, so not a real seal, it just 'winds' the oil back into the sump.

Common cause for a leak here is insufficient crankcase ventilation. So check the PCV system before doing anything.

Post by **bmcecosse** » Sat Mar 29, 2008 5:50 pm

It can also be caused by badly worn main bearings - allowing far too much oil to get at the seal. But it is indeed a good idea to clean out the engine breathing system and if possible connect it to the carb rather than the air filter casing - where it splatters oil fume all over the filter anyway. Basic check - engine hot and idling - take off the oil filler cap - if there is a plume of smoke/fume then really the engine needs an overhaul, and no amount of engine breathing will stop it leaking.