allendave29

Need help guys! I am in the market for a turbo and the car i was checking has a y pipe that show signs of rubbing to the rubber on the behind trunk? What caused the rubbing on the top of the y pipe? Sorry im a newbie here and would really appreciate any help. Thanks in advance!

nzskater

Is it a really small spot, near a clear vent line? Almost all I've seen have this.

Dodaleca

Mine has a rub through the sparkly coating right at the right end connector (turbo intercooler out into the Y pipe), this appears to have been caused by the "hood" fan wiring cable rubbing against it as the engine moves around on it's mounts. I'm surprised that the Y pipe coating and not the fan wiring insulation wore through.


It's a small rub area (maybe 0.25" x 0.5") so I just covered it by putting two cable ties around the Y pipe just after the right clamp (turbo intercooler outlet) so now the fan wiring cable rubs agains the smooth cable ties and not the Y pipe.


I'll see what the dealer has to say about this when I bring it in soon for the season ending oil change.

991turbo

It's more common and a few threads found on 6speed regarding it

allendave29

Here's a picture of the scratch on the right side of the y pipe. What do you guys think?

saabin

Yeah that's not too normal.. It's hard to tell in the picture, but is the rubber hose that the Y-pipe connects to red?

It does look like it has an non-factory hose there, which may explain why it's rubbing (hose may be positioned a little different than stock, thus making the Y-pipe sit higher in the engine bay, thus the rub..)

monty007

yes, I agree with Saabin - aftermarket couplers being used for sure. They are probably bigger than the stock once and thereby pushing up the pipe and making contact on the trunk. I would do a thorough PPI on this one - someone has been wrenching on it in some form.

atcbi5

Here is mine for comparison. Looks like yours is sitting higher and hitting the right top air inlet.

Dodaleca

Mine's the same (as this picture from the previous post) with a small slight black rub spot at very right end of the y-pipe which is what I covered with two white cable ties so that the fan cable doesn't rub against the y-pipe anymore. There are no other rubs on mine.


It does look like with the aftermarket couplers the y-pipe has been raised and is rubbing against the air inlets.

allendave29

I finally figure out the reason after i did the ppi. Mechanic said because the owner replaced the tubing to a silicon hose which is the red one. Its a little bit longer that's why it causes the rubbing. But he said its nothing major. He actually that is a better hose and will last longer. Is that true?

atcbi5

yeah it's the wire bundle on the right not tied! Always say I am going to fix it then forget

Dodaleca

When I looked at the wire bundle in my car I think if I tie it up tight enough not to hang down near the y-pipe then there won't be enough slack in the cable to be able to fully open the "hood".

TTurboRoo

allendave29, I am sure the hoses will last forever. It will last just as long if it is shortened 1/4 inch so that the y pipe does not rub. Meanwhile, it clearly is damaging the y pipe and I am sure it is damaging the air ducting that it is rubbing on as well!