fake turbo failure?

[Blake260]

so About a month ago, I blew a turbo. So I thought. since then I have just moved it from the garage to the driveway and back.

I had all the usual blown turbo symtoms after I blew it (smoke in the exhaust, no boost), the only warning sign I got was the funny idle.

I brought it down the street tonight, hit 20 psi easy. still lots of smoke, but no funny noises or idle, and its boosting.

any ideas??

[mholme]

so About a month ago, I blew a turbo. So I thought. since then I have just moved it from the garage to the driveway and back.

I had all the usual blown turbo symtoms after I blew it (smoke in the exhaust, no boost), the only warning sign I got was the funny idle.

I brought it down the street tonight, hit 20 psi easy. still lots of smoke, but no funny noises or idle, and its boosting.

any ideas??

Not a clue, but 20psi easy on APR software?? You stage 3?

[gointoscott]

How cold has it been in your area? I have heard that when it is really cold condensation can freeze in the Spider hose I think and this allows pressure to build which can force oil past some kind of seals which will cause smoke to go through the exhaust.

If you let the car warm up to thaw the condensation the smoke will clear. Maybe you dont have a blown turbo afterall.

Do you hear the turbo whine?

[Blake260]

no the turbo isn't whining, and it has been pretty cold here lately, like teens during the day and like 0 at night, so maybe that is it, Ill look into it.



i am not stage 3. I have a very old APR chip that was in it when I bought it.

[S4_NE]

no the turbo isn't whining, and it has been pretty cold here lately, like teens during the day and like 0 at night, so maybe that is it, Ill look into it.



i am not stage 3. I have a very old APR chip that was in it when I bought it.

are you running a MBC? 20 PSI is alot for K03 chip APR.

[veggiemonster]

my turbos make lots of noise, hit 16=17 psi and i cant get new ones till they "grenade" (through my warranty). its bullshit

[Blake260]

Headgasket? nothing in the coolant, but there is an oil burning smell and this:

[CONTROL ONE]

my turbos make lots of noise, hit 16=17 psi and i cant get new ones till they "grenade" (through my warranty). its bullshit

Sounds like you need an MBC

[mholme]

[QUOTE=Blake260;3279080]Headgasket? nothing in the coolant, but there is an oil burning smell and this:

Coolant and oil is mixing...

[veggiemonster]

Sounds like you need an MBC

well see the problem is, my clutch slips veryyyyy bad. it started to slip about 2k miles ago if not more. so i have to try and make my clutch outlast my turbos...i hate my life lol

oh and i forgot to mention i bought one (mbc) and it's the wrong got damn size

[Blake260]

well new head gasket....here I come.

any good places to get it from (and bolts) ? ECS and Blauparts both don't seem to carry them.

[RedRocketS4]

talk to jason at JHM. He'll hook you up.

[Blake260]

pulled some funny codes....


Wednesday,21,January,2009,15:30:35:48344
VAG-COM Version: Release 704.1

Address 01: Engine
Control Module Part Number: 8D0 907 551 A
Component and/or Version: 2.7l V6/5VT G 0003
Software Coding: 06611
Work Shop Code: WSC 06325
5 Faults Found:

17539 - Oxygen (Lambda) Sensor; B2 S1: Internal Resistance too High
P1131 - 35-10 - - - Intermittent
17521 - Oxygen (Lambda) Sensor; B1 S1: Internal Resistance too High
P1113 - 35-10 - - - Intermittent
16518 - Oxygen (Lambda) Sensor B1 S1: No Activity
P0134 - 35-10 - - - Intermittent
16538 - Oxygen (Lambda) Sensor B2 S1: No Activity
P0154 - 35-10 - - - Intermittent
17704 - Error in Mapped Cooling System (check Temp-Sensor and Thermostat)
P1296 - 35-10 - - - Intermittent


Spider hose too? any more info on which seals it blows out?

[veggiemonster]

they probably got fouled by all the coolant/oil in your exhaust. you might get lucky and be able to get out of that by just fixing it and driving it to de foul them but idk about the chances of that

[VR4-S4]

You notice any oil drips? Do you still have the belly pan on? Something like this just happened to me last week and I think its related to the cold temps we've been having. I also had a lot of smoke and I noticed oil spots on the garage. We traced it back to the passenger side turbo leaking oil. We are hoping its just the feed line because it appears to be coming from the top of the turbo. Also noticed a leak coming from the rear, by the timing cover/valve cover. The car has stopped smoking but is still leaking oil.

Also my vacuum T broke at the same time this all was happening and cause my boost gauge to stop working. I'm thinking moisture in the lines.

[Blake260]

haven't noticed any oil, but my belly pan is still on.

what I've gathered so far:

1. there is lots of smoke
2. there is coolant in the oil but no oil in the coolant.
3. I am low on oil now (1qt)
4. my turbos are spooling and there are no noises

so I think its either the head gasket(s), or turbo(s) seals. somewhere, coolant is getting into my oil, and either oil or the mixture of both is leaking into my exhaust.

The blown seal would have been caused by frozen moisture in the spider hose (or the like) allowing vapor pressure to build up and shoot out the blown seal.

now I just need a way to find out which seal it is, head gasket(s) or turbo(s)

if we can't figure this out, Ill start with replacing the head gaskets. But I would like to know since the $200 bucks for head gaskets could go towards new turbos. I dont really have the money to just start replacing parts.

[DxC]

why would it be headgaskets? there would be A LOT more mixing of fluids, and your car would be blowing tons of smoke/ not making compression ... so do a simple compression test ...

its not the turbos either since you say they are not making any noises

sounds like you should probably take it to a mechanic or someone who is better at troubleshooting ...... GL

have you driven the car in warm temps? your PCV is obviously frozen ... and the coolant/oil mix could be something else ... RMS?

[Blake260]

I've had the car since july. And I am plenty capable of figuring this out myself. I haven't run into this type of problem before.

I would this on a forum like this I would think that people would be more willing to help troubleshoot rather than tell them to take it to a mechanic

When this happened, I excused it as being my turbos. Lots of smoke and no boost (and no noise). now I am looking deeper into it as I took it out the yesterday and it boosted fine.

The car is usually kept in a heated garage. when this happened it was parked outside all night, and this happened on startup, A month ago. My PVC system is obviously not STILL frozen.

I need to know what seals that this could blow. seals that would throw oil/coolant into the exhaust, and coolant into the oil.

That lead me to believe that seals inside the turbos where shot (oil and water both flow thru the turbos), or the Head gaskets (oil/water)

but I think you are right about it not being the head gaskets, What Would stop oil from going into the coolant, but allow coolant to go into the oil?

So now my guess is the turbos again. the oil is flowing and mixing with coolant, and leaking into the exhaust, while some how the coolant is being leaked out after mixing with the oil inside the turbo. causing the funny coolant code and underhood smoke. but they still spool!?

What is RMS?

[gointoscott]

I would change the oil. and see how much milky stuff is in the oil.In the winter time the oil cap is known to get white substance on it so that may not be that big of deal. But if you have all kinds of white stuff in your oil then you know a seal is bad somewhere.

That would be the easiest thing to try first, then go from there.

[UllSang]

Not to thread jack, but why are people saying that a APR chip has a peak boost of 17-18? I called APR and they told me 21. I Just bought my S4 and it came with an APR chip and my boost gauge shows a peak of 21 and it holds at 16-17., and vagcom logging shows 21.4 of boost (I already subtracted 1 Bar from that number also).

[Blake260]

I recently changed the oil, but maybe a frozen PVC system allowed some blow-by on a seal somewhere and now that it is unfrozen that seal still seals under normal operating conditions. Ill try it.

my APR chip only hits 20psi in 3rd 4th and 5th and it doesnt hold it for long. 17-18 psi is the norm for most chips.

[mholme]

What is RMS?

Rear main seal

[Blake260]

ahh, should have picked up on that.

also my boost gauge sits at -1 so I do have a peak boost of 21psi

[DxC]

have you logged the car at all? any FATS runs to compare? pressure tested? compression tested? you really need some more data to troubleshoot the issue ... right now its pure stabs in the dark ... and the shotgun approach of just fixing EVERYTHING would work, but you said you dont want to just spend money fixing stuff

so like i said, its probably better diagnosed by a professional GOOD audi mechanic, than a bunch of people on the internet, who have no credibility/have no idea wtf they are talking about

[kbjy11]

IIn the winter time the oil cap is known to get white substance on it so that may not be that big of deal.

hmmm.. i am leaking coolant.. about 1 qt every 3 months...

I just checked my cap.... and it had some white crap on it....

I swore loudly, thinking blown HG's or a seal somewhere... and started to do some DIY research on here and stumbled along your post... i have hope....

Last time I changed the oil (was still leaking coolant then).. it wasn't milky at all.... also my dipstick isn't milky as well... hmmmmm... any ideas?

sorry for the thread hijack, but it is related.