Fitted -9's To R34 Gtr - Leak From Rear Turbo Water Line :(

[xanavinismo]

Hi all,

So I fitted a pair of new Garrett -9 turbos to my R34 GT-R (new genuine gaskets/washers etc) and once I put it all back together & fluids back in I noticed I had coolant leaking from my rear turbo Eye bolt water line. Here a pic of what I mean:

Then I remembered that I had forgotten the special note on the R32 GT-R workshop manual (couldnt find R34 GT-R's but should be the same?) that stated:

I only now realised this is to make it easier to fit the eye bolt without damaging the copper crush washers etc. Naturally I'm like FFS! >,<

Anyhoo long story short I got new/genuine copper crush washers and followed the above instruction and re-fitted eye bolt & both washers (easier now that it was loose). Confident that it should be right now I added coolant and bam - its still leaking!!

So my question to you guys now is have I f#cked up the threaded connection of the eye bolt to turbo?? Ie - the Eye bolt thread looked fine but Im thinking the mating side?
Confused as to what it could be now

Any help would be greatly appreciated!

Edited September 4, 2014 by xanavinismo

[89CAL]

If you have both copper washers fitted and have done it up tight enough, and its still leaking, then i would be checking for a crack in the pipe somewhere. copper washers aren't that fragile. are both mating surfaces for the copper washers clean?

[XKLABA]

As above, make sure both surfaces are clean and undamaged

[xanavinismo]

Thanks for replies guys, i'll give both mating surfaces a look.

So if it is in fact that one (or both) mating surfaces are damaged, what is the best way of going about 'cleaning' them?

Cheers,

Edited September 4, 2014 by xanavinismo

[Ben C34]

Depending on how badly damaged either with a honing stone or a file and then stone.

[89CAL]

if you have a buff gun that is the easiest way to do it. You basically want a nice smooth surface with no gouges/scratches etc

check the steel line doesnt have any cracks as well if I havent already said that

[Ben C34]

I doubt he has one or else he wouldn't ask how to do it

[xanavinismo]

Haha yeah unfortunately I dont have one So i'll more then likely have to go the file & honing stone method. Though where can I get these honing stones? Never heard of it =P

And yes i'll also look for any physical cracks on the pipe too when I pull it apart...

[Ben C34]

Haha yeah unfortunately I dont have one So i'll more then likely have to go the file & honing stone method. Though where can I get these honing stones? Never heard of it =P

And yes i'll also look for any physical cracks on the pipe too when I pull it apart...

Any tool shop or probably bunnings. Get a "pocket stone" they are about 60x20x12mmm and are very handy for tidying up faces. Also use full for sharpening knives etc.

[xanavinismo]

Okay kool, will give it a look.

Also is it safe to say that it doesnt take much to damage both mating surfaces? Ie - from trying to force the water line onto the turbo mounting point, & also rubbing against copper washer?

[Ben C34]

Hard to say how rough you have to be to damage the surfaces.

[xanavinismo]

Yeah fair enough man

Okay so heres pics of the water line...

So as you can see rough as hell!

Now heres pics of the mounting point (on turbo side)

Now from what I could see, it doesnt look anywhere near like the water line and could in fact be okay

Please let me know what you guys think?

Cheers,

[Ben C34]

It is very likely that the turbo side is ok. The lines are quite soft.

You can easily file then stone that damage out, or just replace it.

Edited September 5, 2014 by Ben C34

[xanavinismo]

Yeah i'll try the file & stone method first

So should I use a 'fine' type of file?

[scotty nm35]

I wouldn't be using a file, I would glue a sheet of wet and dry down to a piece of glass or something else flat.

[Ben C34]

Depends what file and how good you are with a file doesn't it!

But fair call, a beginner with a bastard file could make a real mess of it.

Edited September 5, 2014 by Ben C34

[89CAL]

I'd get a new turbo line if it was me. That looks fairly crap

But that is just me

[89CAL]

I'd get a new turbo line if it was me. That looks fairly crap

But that is just me

[XKLABA]

The fine side of the sharpening stone will do, just make sure you do it square taking an even amount off all round, to much one side or the other or it will leak

You are doing it up tight enough yeah ?

I'm with Callan on this one, its worth it to get a new one for piece of mind

[xanavinismo]

I am happy to report that its all bolted up now and there are no more leaks! (so far )

So yes the filing & pocket stone method has worked!

Thanks so much for the info & help guys!

Cheers