IHADAV8.com - Turbo Buick Tech, and Nonsense

Tech Area => General Buick Tech => Topic started by: Tim Hensley on February 05 2015, 11:09:48 PM

Title: drain back
Post by: Tim Hensley on February 05 2015, 11:09:48 PM

my NA block i need to tap Is it 1/2 pipe or 3/8 pipe

Title: Re: drain back
Post by: Tim Hensley on February 05 2015, 11:15:24 PM

And should I tap the lifter oil feed lines or stay with the expansion plugs?

Title: Re: drain back
Post by: earlbrown on February 06 2015, 03:45:10 AM

I/2" NPT on the oil drain. and I like tapping the galley plugs...    BUT be careful on the passenger side with the tap, don't go as deep as much as you think you need to.

After going about 1/2 as much as you think you need to, test fit the plug.  If it goes too deep, you'll cut off the oil supply to everything but the turbo (and pressure gauge if you have one)

Title: Re: drain back
Post by: Tim Hensley on February 07 2015, 04:47:26 PM

Thanks