Someone please tell me the turbo isn't toast. . .
#1
Someone please tell me the turbo isn't toast. . .
OK so I get the 951 I just bought all fixed up (alternator belt had snapped for those that missed it). I go out to check on a potential missing hose I noticed (one that goes to the "J" boot), figure it out, hook up the hose and I'm thinking, "hmmm. this would be a good time to shoot the car down to the car wash, give it a halfway decent cleaning, and then take it out on the freeway to see if it 'pulls' better due to the likely fixed vaccum leak I didn't realize I had before". So I go wash it off, get out on the highway and right as I'm getting onto the on-ramp I hear a dramatic change in the engine noise. It goes from the kind of quiet, whispery "whoosh" sound to a loud scream - kind of like a police siren sound. I play with throttle settings for a minute or two and check the gauges to try and figure out what's going on and if it's normal and eventually determine a relationship between boost level and the intensity of the noise. Not engine RPM necessarily, TURBO RPM. It's really scaring me. I brought it home and took a look for any obvious vaccum connections popped off or anything and don't see anything obviously amiss. Any ideas? I really don't want to even think that the turbocharger is somehow shot. . . The weird thing is how suddenly the noise came on and I had all these horrible pictures in my head of poor Eyal's grenaded turbo from a few months back when the hold-down nut went through it. I don't think that's the case; the engine doesn't sound bad or anything, but it doesn't feel "powerful" and still makes this infernal banshee-screaming / police siren noise. Someone please tell me this is something not too bad. . .
#2
sorry to tell you, but that sounds way to familiar... pull that j boot... didnt think youd be upgrading that turbo so fast did you? you have my help on the job, its a bitch, but not impossible.
~Eyal
~Eyal
#6
As Eyal said, take off the boot and look inside for damage
Also, take off the IC pipe and inspect them for FOD.
Possible a vacuum leak (the bypass valve may have failed thus causing air to leak, thus wooshing noises).
Also, take off the IC pipe and inspect them for FOD.
Possible a vacuum leak (the bypass valve may have failed thus causing air to leak, thus wooshing noises).
Trending Topics
#8
It doesn't really go that high - it goes maybe to 1 or a little over; then again, that's about all I've ever seen it go to. No signs of smoke or anything. There wasn't like a "bang" noise that I'd expect from FOD, but I guess anything is possible. Cripes. I've only had this thing two days and I've had the engine apart once, probably soon to be again.
Someone tell me - why do I love these cars again?
Someone tell me - why do I love these cars again?
#9
i think it sounds like the same situation as I. did you notice smoke at all? how about worry about it all night, dont get any sleep, then pull the j boot in the daylight and let me know!
~EYal
~EYal
#10
I kind of wondered about the boost level; I posted somewhere before that the car feels "good" and peppy but it doesn't give you that kick-in-the-*** feeling that I've gotten in other 951s (granted they had mods, this one doesn't except for a test pipe).
#11
Arrrrgggghhh!!! I hate having to work. I suppose I can drive it to work tomorrow and worry about it tomorrow night. I see absolutely no signs of smoke anywhere - where might it be coming from? Turbo? Exhaust pipe?
#12
#14
Originally Posted by Porsche-O-Phile
Arrrrgggghhh!!! I hate having to work. I suppose I can drive it to work tomorrow and worry about it tomorrow night. I see absolutely no signs of smoke anywhere - where might it be coming from? Turbo? Exhaust pipe?
~Eyal
#15
Nope. Never seen it go there. I'm wondering if there aren't some oddball gauge indications though, since my voltmeter constantly shows above the max (i.e. 16v plus). I'm 99% sure this is NOT the case, since no fuses are blowing and the lights aren't insanely bright or anything. It's almost certainly the gauge.
As far as the turbo - man that's nice. I wish I hadn't just spent all my $$$ on this car!
As far as the turbo - man that's nice. I wish I hadn't just spent all my $$$ on this car!