The 16g swap

[rush2252]

As some of you know I started my "project" but looking through all the build logs and how to's its kinda lame to get started reading and then find the project half finished. That being said Im going to give a brief explanation of some common myths about the td05h swap (14b 16g)


A. No your stock t25 oil feed line will not work. It is recommended that you feed the turbo from the head if youve eliminated your balance shafts this will help prevent oil pressure spike and killing the MHI turbos.

B. When you remove the t25 oil feed line there is an adapter on the oil filter housing. Its 3/8BPT british pipe dont waste your time at ACE Home Depot Oreillys NAPA autozone or anywhere else they WONT have it. You can use a 3/8 NPT national Pipe as long as its Brass. It will seal without teflon tape but its recommended that you use it.

C. The T25 oil return line and coolant lines can be used. For the return line you have to enlarge or slot the holes. The Tdo5h or MHI turbo have a shorter distance from center to center on the bolt holes.

D. Its much easier to plan an oil change and coolant flush during this process as you will be losing an excessive amount of both.

E. Last but not least the return lines on all mitsu's leak. TAKE your time. Clean the pan well with a wire brush scrape the old gasket. Use Copper spray a gasket its magic!!! and on the threads of bolts also buy the shouldered bolts. They have a larger head and can be bought from Oreillys or Autozone. They will help seal leaks. The leak usually seeps through the threads of the OEM bolts I failed twice trying to reuse them with teflon.



I am not 100% sure this is a direct cause of the swap but I had an oil pressure scare. Once I inserted the plug in the oil filter housing and got everyting buttoned up I did a few pulls at 16psi. The dummy light came on at idle and I still had the normal reading on the factory gauge. I pulled it back in the garage and hooked up a mechanical gauge and it read 25psi at idle. The idiot light sender has been replaced once I removed it and cleaned it still no luck. I just unplugged it for now. Its either bad or inserting the 3/8 plug affected flow to that particular part.

So if you get a dummy light after feeding from the head double check it maybe just a bad design on the OFH


Here's a few pics... Im planning on saving these to an archive and writing a build log on my entire project from start to finish that away you can see the before and after of everything Ive done.


Kolby

EDITED I had 7 pics but im out of space so it only uploaded 2. This wasnt meant to be a how to just an FYI on some problems I ran into. I planned this out over a month and had help but theres always some tricks that can be passed on hope these help out!!

 

[gorf]

A. No your stock t25 oil feed line will not work. It is recommended that you feed the turbo from the head if youve eliminated your balance shafts this will help prevent oil pressure spike and killing the MHI turbos.


C. The T25 oil return line and coolant lines can be used. For the return line you have to enlarge or slot the holes. The Tdo5h or MHI turbo have a shorter distance from center to center on the bolt holes.

Head / filter oil feed has long been debated. Read, do some searches and make up your own mind. I have been running filter feed for a while with no problems.

Coolant lines, make sure you have some extra reinforced 3/8 fuel line. It is much easier to extend the coolant lines than to bend the metal ones to fit.
Yes you can file out the holes for the oil return line to fit - been running that way for a long time.

 

[mindset]

Will I need to use copper spray on my new gasket for the turbo? What does it do? Just create a better seal?
And once you answer those put them in the "myths" above.

 

[rush2252]

Yes it is recommended. I figured the pic would speak for itself. It helps seal flanges that arent "true" I always use it and on the can it says recommended for turbo flanges head gaskets exhaust manifolds etc. Its really sticky shit and works similar to the old silver paint method for sealing leaks. Plus its reasonably priced and good insurance. If your not going with OEM mitsu gaskets it will help prevent burnout AND it works great on threads similar to loctite and holds up to the extreme heat


I threw it in there because I had several small leaks after I was done. It worked awesome on the oil return if youve ever changed a turbo or the return line you know they are notorious for leaking.


Just be careful it can get messy. Once upon a time I was installing a new flange gasket on a cat and some of it ended up in my hair no fun


Kolby

as for the feed from the head. Why not? unless you have the prexisting feed line for the MHI then your saving yourself time. You have to find the banjo fitting or the new oil feed line because in most instances sellers dont give you the hard line. Also if you think about the t25 oil feed it runs directly under the manifold cooking the oil as it passes by that surely can be good. Not to say it wont last another 100K IF you even run the car that long but its recommended by MITSU to run it from the head. As stated above you might have issues after a BSE due to increased pressure unless you do the plunger relief mod on the OFH