alternate oil feed locations on the head

[jakes97gs]

Hey guys, I have been searching and noticed that while there is a debate over whether to use the ofh or go off the head for turbo oil feed lines, there is very little info regarding places on the head you can use for the feed line. A couple months ago I was swapping my turbo on my 1g (went to a 14b, for whatever reason my car had a 13T turbo according to the casting numbers... but thats a different story), however, it was late when I was finishing up the project and I stripped the stock location on the head where the oil feed line bolts to (it's aluminum and I wasn't paying enough attention to how much pressure I was applying, it sucked). Anyways I read that the hole right in front of the stock location can be used as well, it is plugged with a set screw and I ended up using that location which took a smaller banjo bolt (I drilled out the holes in the bolt for better flow). Anyhow the new location I used is a little bit sketchy due to the setup I was forced to use because the bolt bottoms out well before it seals the banjo and I took up the space with a stack of crush washers. For the most part this setup was working but it has a slow oil leak through the crush washers and I am afraid to tighten the bolt into the head anymore in case I strip this hole too. I know this setup is quite sketchy and I intend to fix it more legitimately, so I am wondering: Aside from the two locations I mentioned (the stock location and the one I am using) are there any other locations on the head that I can use for an oil feed? I would appreciate any input, And I am also aware that the oil filter housing is an option but from what I've read using the head as an oil feed is efficient enough and likely the easiest route for me to take for my 14b. Thanks in advance

 

[Tiki2777]

You should just fix the stock feed from the head, that's what I ended up doing because I stripped it out just like you did.

 

[jakes97gs]

What did you do to fix it?

 

[Tiki2777]

I used some type of brass fitting, I'm not sure exactly what I did and I am not close to my car at the moment. Sorry I can't be of more help.

 

[BogusSVO]

Here is the fix I use.

http://www.dsmtuners.com/forums/cylinder-head-short-block/466235-turbo-oil-feed-port-repair.html

 

[bonecollector]

Here is the fix I use.

http://www.dsmtuners.com/forums/cylinder-head-short-block/466235-turbo-oil-feed-port-repair.html

This is pretty slick! Nice thinking.

Another option similar to this might be to use a "Timesert" The only negative would be the price of the kit.

++ TIME-SERT Metric Kits ++ thread repair kits and inserts repair stripped threads damaged threads repaired threads threaded inserts for metal thread inserts for metal aluminum inserts threaded inserts for aluminum

or eBay search "Timesert"

 

[BogusSVO]

The cost of the timesert kit is why I use brass pipe plugs for bad hole repairs.

 

[jakes97gs]

wow bogus that is quite the fix... I really don't wanna pull my head unless its completely necessary though. The timesert kit looks pretty awesome though but a little pricy... :/ thanks for the ideas guys

 

[BogusSVO]

If you have to drill or tap an oil galley, I will always say to pull the head, I will not risk introducing metal flake into the oiling system.

I would pull the head to install the timesert too.

 

[jakes97gs]

oh yeah that definitely makes sense...crap... I don't wanna pull my head just because I was an idiot installing my feed line... but if it comes down to it I would probably be better off relocating my feed to the ofh and using a restrictor correct? (as opposed to pulling the head)

 

[bonecollector]

The restrictor size will always depend on how much oil pressure your engine is generating. You can't properly choose a restrictor until you've first taken accurate oil pressure readings.


The link below has some good info on turbo restictor size's
http://www.dsmtuners.com/forums/bolt-tech/453337-trying-decide-oil-restrictor-do-i-need-one.html

 

[dfootedsm]

oh yeah that definitely makes sense...crap... I don't wanna pull my head just because I was an idiot installing my feed line... but if it comes down to it I would probably be better off relocating my feed to the ofh and using a restrictor correct? (as opposed to pulling the head)

Your restrictor size is determined by the needs of the turbo you can not select an all purpose restrictor for oiling needs. Ball bearing turbos need less and journal bearing turbos need more. However you should accurately know the amount of oil pressure you are supplying and what each turbo requires.What turbo are you using ? to give an accurate recommendation for your restrictor?