Oil Return tap size? - Boost Forum

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Oil Return tap size?
Tuesday, March 14, 2006 4:29 PM
Ok all i need to know is what size NPT tap I need to tap for my oil return. I have the Hahn oil return kit for the ecotec. Also, which side is the oil retun need to be tapped. Im guessing the back of the oil pan because of the flow of the oil.




Re: Oil Return tap size?
Tuesday, March 14, 2006 4:35 PM
I used like a 3/4" tap I think, and yes, you tap the back of the pan.





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Re: Oil Return tap size?
Tuesday, March 14, 2006 6:37 PM
I used a 3/8 pipe tap... I drilled my whole maybe 3/4 of an inch above the drain plug... worked real great





2004 Turbo cavalier 11PSI and blown!
Re: Oil Return tap size?
Tuesday, March 14, 2006 6:41 PM
^ Way too low, you want the hole above the static level in the pan so you don't backpressure the turbo and build oil up.





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Re: Oil Return tap size?
Tuesday, March 14, 2006 6:47 PM
It might even be more, i went as high as i can above the drain plug, didn't really measure ... It really the only good spot to tap the oil pan, it was the only flat spot on the oil pan...





2004 Turbo cavalier 11PSI and blown!
Re: Oil Return tap size?
Tuesday, March 14, 2006 7:35 PM
he is talking about an ecotec. Not a 2.4L

I dont know how the hahn setup works but....

the best place to tap for oil return on the ecotec motor is in the girdle above the pan. It is made for that and it is where the stock saab turbo setups run to.



"Growing old is mandatory. Growing up? Definitely optional."
Re: Oil Return tap size?
Tuesday, March 14, 2006 7:48 PM
The instructions on the HRC setup, sais to tap above the oil drain plug.





2004 Turbo cavalier 11PSI and blown!
Re: Oil Return tap size?
Tuesday, March 14, 2006 7:55 PM
Brandoson - 13.82@99.88 wrote:he is talking about an ecotec. Not a 2.4L

I dont know how the hahn setup works but....

the best place to tap for oil return on the ecotec motor is in the girdle above the pan. It is made for that and it is where the stock saab turbo setups run to.

pics?
Re: Oil Return tap size?
Wednesday, March 15, 2006 9:58 AM
If you look at the back of the engine its pretty self explanitory. It kinda sticks out.

I have posted pictures of this numerous times. A simple search for "ecotec oil return" finds several threads.

here it is again tho.

I started out with a small drill bit and worked my way up. That way I could change the angle slightly to make it come out in the correct place on the other side.

http://www.azjbo.org/forum/garage.php?mode=viewgarage&u=16


girdle off the car with location circled


top side


bottoms side




"Growing old is mandatory. Growing up? Definitely optional."
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