ok guys lets see what you think is causing my problem,
i have a high compression LSvtec build not positive on c/r but each cylinder is pushing around 220-225 psi, i had a oil pan leak after the first test drive of the new build, the oil pan gasket sprang a leak on numerous spots around the bottom of block.
so like anyone would do i went and got a new oil pan and gasket even put black RTV to help seal the gasket, it sat for 24 hrs before i even cranked the car after the new pan and gasket were installed.
it held up fine until i got about 40 miles on the new gasket and took 3rd gear into about 5-6k rpms ( still breaking in fresh build )wheni got home and inspected the oil pan it started to drip a very small amount from the corner closet to the ac compressor

my question is: will a high compression engine push oil out of spots like this that a normal engine would not?

if so what can i do to prevent these leaks from happening, i was thinking maybe catch can set up and vent the block and/or valve cover?

any input would be helpful

 

Not too terribly intimate with increasing the compression, but I would look at the PCV system as well - make sure it's not blocked or clogged with oil and gunk.

Not sure how to quantify the increase in c/r to the increase in blowby, so I can't comment.

 

A catch can with a vented valve cover and block is not a bad idea. The blocks have a positive crank case vent already, just pipe that to the catch can. Also, venting the valve cover (via new vents, the stock one is mediocre) could help.

I'm not sure if your high compression is the cause of this. Doesn't the LSVTEC process include modifications to oil passages and such?

 

everything on this engine is brand new block and head were both cleaned at machine shop then assembled at a later date

 

My jdm is putting out 260 compression across all 4 with no oil pan leaks. .. you just need to make sure the block and pan are 100 percent residue/oil free ...i like to also wipe up into the block before mounting the pan so no oil drips down to the pan in the time it takes to mount it

Its going to leak even if there is the tiniest bit of oil. You can even use a lil loctite to be sure the bolts dont back out.