MixMan X

iTrader: (7)

I don't know if anyone can shed any light on this, but its really done my head over the weekend!

Fitted a decat, (standard Subaru) up pipe, new turbo,(brand new Kinugawa TD04) and brand new Cobra decat down pipe. Now whatever I do I can't get the gasket to seal between the up pipe and turbo.

I took it all apart again to see what was going on, and the decat up pipe was bent, and not flat on the turbo mount, so I went back to the standard up pipe, but still the same problem.

This time I took the turbo right off again and checked the mounting surface, which is perfectly flat, and so is the up pipe. I did also fit a new induction pipe, which is a bit tight, but that is flexible silicone, so I cant see that stopping it going on. The down pipe fits perfectly, so its not pulling it out of alignment, I'm using brand new genuine Subaru gaskets. I've even tried doubling up the gasket, but no joy.

Anyone else had this? I can't find anything about anyone else having this problem?

scooby87

iTrader: (5)

I find the oil return pipe and inlet pipe on the turbo will try and drag it un even off the top of the up-pipe as you describe. But tightening the 3 bolts down hard should drag the turbo snug on top of the up-pipe.

If both surfaces are flat they should just drag together on the bolts, those bolts are pretty tough so many some more umph might be needed?

MixMan X

iTrader: (7)

Well I tightened them to the suggested torque, 26ft lb I think, but there was still a 2mm gap, so I gave I tried going as tight as I could with the torque wrench, not the best idea in hindsight, but after refitting the turbo four times, I was getting a little pi55ed off. Still no good though.

johned

Why not fit the up pipe to the turbo first then see how the other joints line up.

MixMan X

iTrader: (7)

Think I'll do that. I've ordered a new decat up pipe, so I'm going to leave it as it is for now, but when I get the new part I'll take the turbo right off ant test fit it to the up pipe first.

johned

Out of interest which up pipe have you ordered?.

MixMan X

iTrader: (7)

HKS, the only one I could find that didn't have a flexi pipe or slip joint.

johned

Any idea of the bore diameter?.

MixMan X

iTrader: (7)

For the HKS? not sure, but I think I read 45mm somewhere.

johned

Ok just didnt want you having the bother i had with too big a bore up pipe.