when coolant gets in your oil. but thats just one of many possibilities

 

If you have it out is there a way to look at it and tell

 

When you have a coolant leak from the weep hole...coolant can only get in the oil from the oil seal that is opposite.

 

If you pull the seal out you will need to buy a new one. It usually never seals up again.

 

Leaks from weep hole

 

As stated, if removed, it needs to be replaced. If it does not leak, then it should be fine...FYI; we replace 100% of the Mechanical Seals on all our engine rebuilds, regardless if it looks good or not, simply for piece of mind...you may want to do the same. Carlos

 

Thanks anyone know where to get them and not pay an arm and leg for them

 

I just replaced mine earlier today after a full rebuild. It was leaking when I got it put back together. Pretty easy to do yourself. Costs about $35-40.