Drive side seal test

[jonno]

Am I right in remembering that to test if the drive side seal has gone you put a cloth over the exhaust and it should stop if every thing's ok?Lashed up a leak test but a couple of leaks put the kaibosh on that method,them being in some welding.There is no other explanation for loss of gearbox oil is there?Rear hub seal is ok.

[torquewrench]

The drive side seal failures I have seen have been accompanied by clouds of white smoke coming out of the exhaust.

[jonno]

Some peeps have said that in the past but checked oil level and ok.I use 4% fully synth,and when warmed up smoke isnt excessive

[Knowledge]

Jonno,

It is usually a distinctive white smoke, and plenty of it, to the point that your mates would prefer that you rode at the back.

What symptoms are you trying to eradicate?

Martin

[coaster]

Jonno,

It is usually a distinctive white smoke, and plenty of it, to the point that your mates would prefer that you rode at the back.

It doesn't smell like 2 stroke oil either...in fact it tends to stink

[jonno]

Hi knowledge,just trying to find out where half my gearbox oil went.Dont want to strip it down till end of sprint season.Sure I put right amount in pretty ocd about that.Think Ill refill see how it goes.Ill block the exhaust to test it

[Mel K]

A quick covering of your exhaust with your hand is ok for checking an exhaust leak but I wouldn't block the exhaust to check for oil seal leaks , the build up of pressure you'd create has to go somewhere and you could end up blowing an oil seal in the process . Just my thoughts on the subject .

[Norfolk]

When my drive side seal failed symptoms were engine ran just as expected for approx 5 miles , then god help anyone following me white smoke in excess from the exhaust was a understatement ! The gearbox was found to be completely devoid of any oil! Tried an aftermarket seal expander additive to cure the problem which was a waste of time ! !

[Digger]

Yes indeed - you simply can not mistake a drive side oil seal failure smoke cloud for anything else.