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Driling oil feed in 23U AWD block?

JarrettL

By JarrettL,
in Engines & Forced Induction

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JarrettL Contributor

JarrettL

Posted
Posted

Alright, I've held off from posting this because it doesn't seem to make any sense and I know it's a topic that was beat to death and back two decades ago and then again after that.

I have an AWD 23U block from an ENR34 that was NA from the factory. I'm rebuilding it with a turbo NEO head and ARP studs to sell it on so I can move on to a different engine build, and I'm stumped on the oil feed. Conventional logic, as I understand it, is that the NA blocks are tapped for the oil feed from the factory, but don't drilled through into the passage. This block seems to have a small hole withing the M12 threaded hole that goes fairly deep into the block material. So it would seem at a glance to be done in this application. Only, this engine has never been turbocharged, and I didn't remove a plug from this hole when tearing it down. Does the hole need to go even further than the depth I've shown here with the drill bit? Am I missing something?

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Duncan Grand Master

Duncan

Posted
Posted
2 hours ago, FiXtUrE said:

Measure the hole from which welch plug you’re going to remove/tap into. Earls fittings will braided lines should do the job, depending on the hole size.

I don't think that is good advice, if you attach a turbo oil feed to a welch plug you will get coolant, not oil in most cases.

In this case the oil feed seems to be there, it is just a question of making sure is connected right through.

  • Thanks 1
Duncan Grand Master

Duncan

Posted
Posted
9 minutes ago, FiXtUrE said:

What remove Welch plug, add helicoil ( which will shorten/lower the thread size though for the fitting ) Otherwise tap a thread into the existing hole.

Mate, I don't know what is going on with your posts, but I can only think one 1 welch plug in an rb that goes to an oil gallery and it is not externally accessible (behind the oil pump). There is another in the rear of the head but it is to a void not a pressure source. 

Please post a pic with exactly which welch plug you think would be suitable for use as a turbo oil feed.

To OP, I don't have a disassembled block handy, but I believe the oil galleries are on the right side of the block, so yes it could be a pretty long passage. It looks like your sump is off so spin it over and have a look

Duncan Grand Master

Duncan

Posted
Posted

I know the smart choice is to let this go, but FYI those welch plugs go to the water jacket and have coolant behind them, so would not be great as a turbo oil feed. OP is holding a drill, not pointing at the welch plug. Per their first pic, they are asking about the factory threaded hole in the block between cylinders 3 and 4

GTSBoy Grand Master

GTSBoy

Posted
Posted
15 minutes ago, NZ-GTT said:

You may want to add another fool to your ignore list!

Considered it! It seems that our rocket surgeon has taken himself off to be an expert on Aliexpress lip extensions and body kit bullshit, in a part of the forum that I never visit. He hasn't been seen in the useful part of the forum for a week or so.

TurboTapin Experienced

TurboTapin

Posted
Posted
4 hours ago, GTSBoy said:

Considered it! It seems that our rocket surgeon has taken himself off to be an expert on Aliexpress lip extensions and body kit bullshit, in a part of the forum that I never visit. He hasn't been seen in the useful part of the forum for a week or so.

FiXtUrE after reading your comment.

image.thumb.jpeg.e6372facc3be052ac36d294ccd2646fe.jpeg

 

  • 3 weeks later...

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