Drilling Turbo oil lines on a TD42 N/A motor

Has anyone got any pictures of the turbo drain barb that you tap / weld into the sump. What size diameter is the tube? 10, 12mm??

Hey mate I'm using the phone so can't give a link but have a look at the DIY thread about putting turbo on td42 na conversion. It shows pics of my install.

Not sure if I showed sizes but it was bigger than 12mm. More like 14-16 i think. Bigger is better to get the hot oil out. I'll measure mine when I get home in a few days if no one gets back to you here or that other post doesn't have the exact size.

Thanks mate, that would be very helpful. I have the motor out all stripped down ready for the rebuild. I'm not putting a turbo on right now but i will be in the near future. It would be a good time to get the sump side of the job done considering i couldn't get the sump off with the motor in.

All the ones I've seen done goes into the sump. Quick easy, no fuss. This ranged from Comp to Daily drivers. Never saw a problem

Yeah i think i will be heading down that path, i just dont know what size to put in there.

You could also just measure the dia of the oil drain pipe that comes off the turbo and match that to the barb and bobs your auntie. No point in going bigger than that.

Normally they are 5/8 or 16mm

Yeah, well I haven't got the turbo or anything yet. So I can't measure that. I'm going to take your word for it and use 5/8 or 16mm. The engine rebuild has cost a fair bit with all the little extras I have found that need replacing along the way. At least I found out why there was an awful clunky shudder on take off at low revs. The rubber engine mounts had totally separated on both sides!!!

Drill and tapping the sump is about a 5 minute job and if you stuff it up, its only the cost of a new sump, not a new block.

I drilled and tapped a barb into a truck block to maintain a factory breather drain (newer engine, older truck) worked a treat and never had a problem.

In saying that, normal aftermarket turbo drain would be the sump, by far the easiest.