MyE28.com

It seems that tapping the oil return line into the oil pan on the exhaust (passenger) side will interfere with the baffling and be a tad low maybe causing some backflow. This was discussed on another site and the concensus seems to be that the block should be tapped about a 1" above the oil pan. Anyone confrim this or a better option?

terrybpp wrote:It seems that tapping the oil return line into the oil pan on the exhaust (passenger) side will interfere with the baffling and be a tad low maybe causing some backflow. This was discussed on another site and the concensus seems to be that the block should be tapped about a 1" above the oil pan. Anyone confrim this or a better option?

The other site is offering you dubious advice. Above the baffle but in the oil pan is fine.

Todd

terrybpp wrote:It seems that tapping the oil return line into the oil pan on the exhaust (passenger) side will interfere with the baffling and be a tad low maybe causing some backflow. This was discussed on another site and the concensus seems to be that the block should be tapped about a 1" above the oil pan. Anyone confrim this or a better option?

Dinans system taps the block like you say. The specs are in their documentation. We just did a block tap on my b35 block.

http://arb.ca.gov/msprog/aftermkt/devic ... -176-1.pdf

As Todd said, the pan is OK also.

RussC

i tapped mine on the little "knotch" on the block - took a heafty drill bit and an hour or two of drilling to get through the cast iron - but it's a clean job.

Tjn182 wrote:i tapped mine on the little "knotch" on the block - took a heafty drill bit and an hour or two of drilling to get through the cast iron - but it's a clean job.

Cast iron is really soft. It only took me ~1 minute with a good bit.
Todd

Tj, make sure you have the pointy end of the drill bit against the material being drill....

my drill wasn't exactly that powerful either, kept getting stuck.... my knuckles were bleeding when I was done because it would get stuck and fling my fist against the engine.

so pish posh

i have a e34 w 745 setup
i regret tapping my block. b35 block has a flat spot that looked like the perfect place for a fitting ( like the b34 block )
results after i was drilling pretty deep i was drilling into 1/2 of the main crank cap support !

at the end i had to tap into the block on a 45 degree angle away from the main cap.....
leaked for a while so i had to use epoxy to seal around the fitting...

at the end i dont know if the oil pan is too thin to tap but i will definetly NOT tap my block next time

I ended up drilling & tapping the blank area with a with a 10 AN fitting. No clearence issues and great drain angle. Thanks guys.

BTW: only took about 30 mins to thread the hole and if you have ever had a leaky drain then you will know its worth it.