kentburlingame

Hello all,

My '01 recently started throwing CELs when putting around on typical roads, and the shop informed me (after having cleared the code the first time because there wasn't any discernible cause) that I have a boost leak due to a failed/failing y-pipe. I had heard from a fellow Porsche owner (he owns a 930) that these are prone to failing, and so I'd prefer to replace it with an aftermarket solution instead of opening myself up to having another OEM one fail on me.

I've spent nearly an entire workday looking for a couple options and have only been able to find 4.

There's this one from BBi/IPD: http://ipdplenums.com/products/plenu...6-turbosx50gt2 (scroll to bottom of the page)

One from markski: https://markskituning.com/product/ma...pe-intake-kit/ (but I don't really want to go MAFless)

This one from SpeedTech: http://www.speedtechexhausts.com/ast...-28-16_018.htm

And then another from a brand I won't post here, but have done some research and consensus seems to be that their quality is questionable, so I will be avoiding that.

Are there any additional recommendations that I should check out? What are other people doing for this (for those whose y-pipes have been the source of boost leaks)?

Thanks in advance.

-Kent

kmagnuss

I think EVOMS makes one but I'm not sure.

911mhawk

Are you confident in the shop's assessment and that it is not a leak somewhere else? Haven't heard of a lot of Y pipes needing to be replaced for leaking, maybe get another opinion if available. Where are you located?

ghostofpain

I doubt its the y-pipe itself.
Where is the leak? Go there and let them show it to u. Soapwater can make it visual.

32krazy!

i havent heard of a y pipe ever failing. its cast metal. whats to fail? the clips that hold it onto the i/c can fail but easily replaced. the gasket behind the t/b can fail again easily replaced.

remember all the y pipes you posted are much larger than stock and likely wont fit if you are retaining the stock airbox setup. time to make the shop prove the y pipe is bad. and if for some reason it is i have a stock unit ill sell for less than new and save you the hassles of aftermarket unless thats what you want

Fishey

The most prone to failure leaks are check valve 16, cbv, f pipe and people not connecting hoses correctly after service.

"02996ttx50

more than likely ( +1 ) just a new clip needed. my oem's last for decades lol.. but yes to checking #16 also i/c hoses.

kentburlingame

I was fairly confident in their assessment of the y-pipe failure until asking here.

911mhawk, I'm in the greater Seattle area. I had taken the car to Porsche Bellevue as it was the only shop open - that I know of - on the weekend when the CEL had initially occurred though typically don't go there. I'll try going back today to see if they can do the soapwater test as ghostofpain suggested. If they're not willing, there are a large number of indy shops I can take it to to get things sorted, one of which I'm in contact with for the possible replacement.

also, 32krazy!, as you brought it up, I no longer have a stock air intake, I put in the EVOMS unit, but had noticed that both the BBi/IPD and the markski setups didn't look to leave space for either. suppose that answers my questions there.

clearly need to do a bit more research on this (must admit it was surprising that I could find so little when research failed y-pipes, but now it makes sense). thanks for all the help.

911mhawk

Let us know how it worked out going back to the shop.
Like you said there are several good options in our area.
PM me if you want, boost leak testing is pretty easy to do yourself with a compressor, regulator and homemade tester. Getting to some of the leaks may not be as easy as finding them!

kentburlingame

called the shop Saturday, but never heard back from them.

As I haven't had the issue reproduce for over a week, I'm going to assume that the shop tightened whichever clamps/hoses may have been at fault. The indy shop I was looking at suggested a smoke test the next time an issue occurs. Is this similar to the soap water test or can it produce more false negatives?

Regardless, thanks all for the replies, and 911mhawk, I'll reach out if I need some assistance moving forward (will likely be via email as I don't have the ability to PM that I know of).

32krazy!

smoke test can find vacuum leaks as it sucks the smoke into the system. boost leak testing pressurizes the system and soapy water finds those leaks since bubbles form from the escaping air.

kentburlingame

so do they test two separate things? or is it a "more than one way to skin a cat" type deal?

RngTrtl

smoke test can find a vacuum leak. pressure test will find vacuum and boost leak.

32krazy!

Yes its 2 different ways to find leaks

"02996ttx50

if you have to test one way only? pressure test every time from the turbos. it's never failed to find any existing leaks using that method.