low boost after egr cooler and oil cooler

[Simoncx]

I finally got the egr cooler and oil cooler done last night, flushed the system a 6-7 times to get clean water coming out but now I seem to have a leak somewhere by the turbo. It makes a loud hissing noise and it doesn't want to bring up the boost usless I really step on it but even then it's slow to bring it up. I think it's where the y pipe connects to the turbo but not positive because I have to wait until the engine is cooled down so I can get my hand back there to see if I can feel it. Anyone know anywhere else where it could leak, I checked all the boots and they seem fine could the clamp be bad by the y pipe.

[Newman]

Its most likely where the exhaust goes into the turbo. They are a real PIA to get to seal.

[ajpu1983]

Yeah that y-pipe can be a pain. I loosen all 4 bolts and nuts where the y-pipe attaches to the exh. manifolds so that the y-pipe has some movement for correct alignment with the turbo.

[Simoncx]

Hopefully it stops raining tomorrow and I can get a better look back there, not looking foward to it because it going to be a pia again. Atleast the truck is back running again, now I just have to finish up the last couple things and it will be done. Thanks for the help.

[jagular7]

I have the same issue. Though it has been 2 months since the install. Didn't notice the smell of the exhaust into the can through the fan as the AC was on max (interior recycle mode).
Now looking around and trying to place my hand on/near the pipe connections, I'm looking for a leak at idle. It is not easy at all. What it looks like what will happen is the removal of the down pipe and the loosening of the bolts/nuts on the piping to get the exhaust inlet pipe to seal against the turbo. Really can't get back there unless the downpipe is out of the way, or cab pulled off the frame.

[Simoncx]

Mine smells pretty bad in the cab, I checked the y pipe clamp and it's fine but ended up taking it to a mechinic today because I spent 3 days and nothing. There is definietly a exhaust leak somewhere because you can hear it but I can't find it, right now I'm pretty much tried of it and just want my truck running again. Hopefully they'll get to it tomorrow morning.

[Newman]

Did you check between your manifolds and the heads?

[Simoncx]

Yup thats where the leak was, got the truck back today and the mechinic said there was a leak by the manifolds and the main thing was the y-pipe needed to be realigned. I guess you have to have long thin arms to get back there because I couldn't reach back there, lots of atempts and lots of cursing inbetween. Everything seems to be fine now, I was just tried of working on it in the rain for the past 2 days.

[Galaxie]

How did this work out?