I recently had my motor built and I started to find oil spots on the bottom of my garage floor. I found it to be coming from a corner of the timing belt cover on the driver side. I had the timing cover taken apart and cleaned and even used nissan seal and still its leaking from the same spot. I searched on the web that there are product's like Bars engine oil stop leak (http://www.barsproducts.com/E10L.htm) that says it can stop minor engine oil leaks. Is this product safe to use or will it damage the engine after time?

 

i would attempt to seal the leak w/proper sealant, there is no way i would add that crap to my oil!

 

I did. It still leaked the second time around. I used the expensive nissan red sealant this time around and still it leaks.

 

maybe something is warped? found out the cause. I wouldnt suggest putting any additive into the oil.(my opinion of course).

 

I'd be willing to bet its coming from the upper oil pan and just appears as though its the timing cover. The other option is that there is a hairline crack not easily visible to the naked eye. I had a crack in my upper oil pan that even when removed and viewed under light could not be seen but oil managed to seep through.
Very annoying, the engine had to come apart to fix it.