My setup is a Borgwarner t3/t04e turbo on an H22 4th gen prelude. My turbo oil drain sits right in front of my front engine mount so my oil return goes foward with a large radius bend, downward sloping, with NO kinks. Line is about 10".

My question, is it necessary to have angular fittings (45 degree) going into the oil pan? Right now, it looks better for me to run the oil return straight into my -10 AN fitting on the pan. This way there is no elevation or break in the continuous downward slope, but I was affraid this may affect oil drainage?

Fitting is tapped at the very top, enough for me to fit the -10 AN fitting. Oil does not run out of the fitting when I take off the drain line.

Pictures here:
Oil return fitting


Return line



Straight into the pan


Any and all comments welcomed.

 

That's good to hear. I was thinking along the same lines but wanted a second opinion.
I am trying to troubleshoot why I have oil in my compressor housing (freshly rebuilt turbo).


Modified by bb_one at 2:12 AM 7/18/2006

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by bb_one &raquo;</TD></TR><TR><TD CLASS="quote">BTW, how can you differentiate between a -3AN and a -4AN line? By outer diameter of the line? Can someone confirm this?</TD></TR></TABLE>

the inner and outer diameter are larger, thickness is the same- least thats what i saw with my -8 and -10 lines, just a bigger tube

I would worry about that hosing that close to your dp though, i had a rubber line melt on me like that and that line u got is just rubber with some threaded reinforcement....just keep an eye on it, rubber may melt before the threads burn :/

My mcmaster-carr lines look just like yours and they dont stand up to heat for ****!

 

Thank you for the suggestion, I will get some thermal wrapping and wrap up that section of the return line.




Modified by bb_one at 2:12 AM 7/18/2006