Can I use this as an oil pressure source for my stock mitsu turbo?

[GeoTalon91]

Hi, one quick question for the guru's in this site.

The car in question is a 92 Talon TSi 6-bolt.

I want to know if it is ok to tap into the front hole (see pic) of the head that is next to the original hole that feeds the inlet for the turbo.

I bought the head from someone here and he plugged the original hole that fed the turbo. I tried taking the plug out with an allen wrench, but that only rounded the inside of it and now it seems like it will stay stuck in there.

I've been reading on certain threads and it seems that the original hole for the oil inlet has and small hole/orifice to keep the oil pressure down to the turbo.

My concern is if I use the other hole, then I may flood the turbo with oil or even worst drain the head and engine from getting sufficient pressure and cause massive damage to the crack or cams.

Any help and advice is greatly appreciated.

thanks

 

[dsmornothing]

I would not use that as a feed. Go from the oil filter housing if you can't get the plug out. You could pound a torx in the plug and try that.

 

[BogusSVO]

Depends on the turbo you run, some can be fed from the head.

Now if the head has been surfaced, the oil transfer slot from block to head may be thinned out, and not allow enough oil flow.

Most perfer to feed from the OFH and you a proper sized restrictor.

Also the oil galley plug you have circled is not the OE 1g turbo oil feed port.
The one you want to use is around the corner from that one.
That port is a metric NPT, smaller than a 1/8npt.

The OE one is 10mm and uses a banjo bolt

 

[GeoTalon91]

The turbo is the stock mitsu.

Not sure if the head has been resurfaced.

The original owner of the had was actually getting oil from this area just not sure if it was to a turbo or to a guage. There was a blue An type fitting that was there, but I removed it and put the plug in from my original head.

 

[BogusSVO]

Stock mitsu turbo... means little..
Is it a T25? or a T28? or a 14b? Or one of the 3 diffrent 16g? it could be a 18g or a 20g too

Stock to what? a 1g or a 2g?

 

[GeoTalon91]

The Car is a Talon Tsi 1992 5 Speed, turbo is factory one, I beleive that is the 14B, not sure though I need to do some research on that.

 

[BogusSVO]

Well go get the numbers off it, and a couple pics of it and post them in this thread.

http://www.dsmtuners.com/forums/newbie-forum/57878-what-turbo-merged-turbo-id-identification.html

Then from there it can be figured out if that turbo is best fed from the head, or if it needs to be fed from the OFH.

 

[KevinRR]

The Car is a Talon Tsi 1992 5 Speed, turbo is factory one, I beleive that is the 14B, not sure though I need to do some research on that.

If its the stock turbo then feed it from the head. The stock oil feed location is right next to where you circle. It should have a banjo bolt and two crush washer there.

 

[GeoTalon91]

Its definitely a stock turbo,I'll take pics of the car tomorrow as it is at a buddies warehouse.

Thanks to everyone for the help I really do appreciate it, however the main concern was whether or not I could use that hole as an oil feed for the turbo due to the fact that the OE side hole has a plug that has been rounded off so now I can't take the plug out to use the factory side OE hole as my oil feed hole.

So I guess now my main question is how do I take this plug off, if I cant use that front hole as an oil source? It looks to be a Torx type plug but again the inside of the plug has been rounded off.

 

[BogusSVO]

It is an allen head pipe plug, just a guess, I would say 1/4 npt, it will take a SAE allen wrench or allen bit socket.

If it is rounded and will not come out with the proper sized allen wrench.

You will have to carefully dill the plug some,a 5/16 drill bit, but do not break thu, so there will be less chances of metal chips in the oil supply.

Then get a straight flute EZ out, not a twisted flute.

Grind the point off the EZ out so it has a flat nose to it, and tap it into place, and back it out.

Now since it a 1/4 npt plug, the threads are going to be messed up, get a tap and you can try to get it so a banjo bolt will work, That is doubfull tho.

 

[flawlessTSI]

I used that for a oil feed for one of my cars. What i did was twist the stock feed line to line up to the hole and the stock banjo bolt even threaded in to it.

I wouldent try and take out that plug, you never know what is wrong with the thread's or whyit was plugged in the first pkace.

 

[Diamond Star Werks]

Or get a allen key/socket thats just slightly larger than the one that rounded it out and beat it in with a hammer. Then turn it out. Socket is best.

I don't think its pipe threaded though bogus. I remember mine being straight threads. It seals with a copper crush washer.

 

[GeoTalon91]

Actually I used an allen wrench and it began to round it off....I'm thinking it may be a torx wrench....

Maybe I can get a regular bolt add some JB weld and insert it into the rounded hole then try to back it out???

I used that for a oil feed for one of my cars. What i did was twist the stock feed line to line up to the hole and the stock banjo bolt even threaded in to it.

I wouldent try and take out that plug, you never know what is wrong with the thread's or whyit was plugged in the first pkace.

That's exactly what I did!!!

Except I wanted to make sure this would have no ill effect on the engine or the turbo before I even attempted to start it.

Also I lost one of the crush washers so I added 3 regular washers to the side that the oil line meets with the head. I have the crush washer installed on the side that the banjo bolt meets with the oil line. The 3 washers keeps the bolt from going to far inside the head when I threaded it in the hole.

 

[flawlessTSI]

It will have absolutely no effect on anything, the oil port is the same size as the original location.

 

[GeoTalon91]

Or get a allen key/socket thats just slightly larger than the one that rounded it out and beat it in with a hammer. Then turn it out. Socket is best.

I don't think its pipe threaded though bogus. I remember mine being straight threads. It seals with a copper crush washer.

That sounds like a good Idea as well.

Really hope one of these tricks work. The car has been sidelined for a while and I'm actually looking forward to getting it back on the road.

It will have absolutely no effect on anything, the oil port is the same size as the original location.

I'm hoping you are correct, it will save me a bunch of time, hassle and headaches if this is the case.

I was worried that it would

A) Block the passage inside the head that goes either to the cams or the back to the crank.

B)It would flood the Turbo with too much oil as I've heard that the OE hole on the side of the head actually has a small restriction in the hole. As opposed to the regular hole in the front of the head. I did notice that the original banjo bolt fit in without and force.

How long have you been running your turbo/engine with the oil feed line in the front hole as opposed to the side OE hole?

I'm running balance shafts so I'm not sure if that will also affect the oil pressure.

So I should have no problem running the stock oil feed line from the front port located the head?