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MunkPuppy · Posted: Sun Sep 14, 2003 9:26 am Post subject: Holy smoke

Well installing the rebuilt turbo has made the car a lot faster and more powerful, but has also made me a lot less popular in my neighbourhood. Here's why:
When the car is cold, I get a LOT of white smoke coming from my exhaust, as well as some smoke from under the hood. When the engine warms up, the smoke very suddenly stops altogether. The problem, of course, is the embarassment of having a car blowing tons of white smoke for about 5 minutes while the engine heats up. I'm concerned that this could eventually cause a lot of coking in the turbo exhaust, as seen in the pictures of the turbo that came out of the car.
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'80 931 FOR SALE

"It's a shame that stupidity isn't painful"
-Anton Szandor LaVey

Chris · Joined: 10 Dec 2002 Posts: 62

hmmm... I used to have a 1980 931 that did the same thing when I started it up. I think oil maybe getting into your turbocharger & blowing into the intake causing the smoke. Take the injection tube off of the car (the crossover pipe that goes into the the throttle body from the turbocharger) and see if you have oil residue inside the tube. Generally that is casued by the seals inside the turbocharger leaking. (Is this a NEW turbocharger, or a used one?).

It could also be from the valve guides wearing out, but if this problem started out of the clear blue when you installed the other turbocharger, I would suspect it to be tied into turbo somehow....

I would be interested in hearing what ideas some of the other experts here have to say....

Chris · Joined: 10 Dec 2002 Posts: 62

ahhh... Its a rebuilt (now that I re-read it).... Are you certain it was rebuilt properly?

MunkPuppy · Posted: Sun Sep 14, 2003 10:40 am Post subject:

no, I'm not *certain* that it was rebuilt properly; I can't speak for lizard on this but it was my first turbo rebuild. We replaced all of the parts that were included with the rebuild kit, and made sure that everything was tightened up, except for the turbine shaft, which we tightened down enough to keep the turbine spinning freely, then locked down the nut. That's that the guys at the turbo shop told us to do.
_________________
'80 931 FOR SALE

"It's a shame that stupidity isn't painful"
-Anton Szandor LaVey

wdb · Joined: 02 Nov 2002 Posts: 2024

are you sure its oil causing the smoke ,I've never seen oil burn white . oil smoke is blue to black depending on how much is burning . I've seen water and brake fluid burn white , the water quicky disapating into the air , the brake fluid was billowing white clouds ,that smelled like brake fluid . maybe you should top off all your fluids and keep an eye on them to see what is draining away . if its brake fluid , it will contaminate and brake down your oil and cause a main or rod bearing failure soon.

MunkPuppy · Posted: Sun Sep 14, 2003 10:53 am Post subject:

I'm not entirely sure how brake fluid could find its way into the engine. However, I know it's not water, as the smoke does not dissipate quickly.
I was also given the understanding that synthetic oils burned more white than blue. Yes, the smoke has a blue tint to it, but it's mostly white.
_________________
'80 931 FOR SALE

"It's a shame that stupidity isn't painful"
-Anton Szandor LaVey

Joes924Racer · Posted: Sun Sep 14, 2003 11:04 am Post subject:

Very brave minkpuppy

[I noticed large letters in LOT].
although somethings are better left untold you need to find the cause that must be hell on your psyche.

psyche-To undermine the confidence of by psychological means; intimidate: “Depending on whose personality is stronger, one can more easily psych the other”

Joes924racer
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1979 porsche 924 Na
1980 porsche Turbo 931GT Replica
Have u ever driven a turbo.

924 turbo · Posted: Sun Sep 14, 2003 11:27 am Post subject:

I think Joe meant psy·che (n): The spirit or soul; The mind functioning as the center of thought, emotion, and behavior and consciously or unconsciously adjusting or mediating the body's responses to the social and physical environment.
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Jon Furst

MunkPuppy · Posted: Sun Sep 14, 2003 12:51 pm Post subject:

yes, Joe, it is hell on my psyche (pronounced sy-kee). However, your definition is that of psych (rhymes with bike). 924 Turbo got it right. (I was an A student in English, and I never once lost a spelling bee. Do not confuse good grammar and spelling with poor typing)

I've also found an oil leak that appears to be coming from the oil intake or outlet pipe, I can't tell which because the visibility is extremely poor in there.

I'm most likely going to have to take the car back down to Lizard's place next weekend and run over the entire thing again.
_________________
'80 931 FOR SALE

"It's a shame that stupidity isn't painful"
-Anton Szandor LaVey

Joes924Racer · Posted: Sun Sep 14, 2003 4:47 pm Post subject:

You mean I messed up.. yea I meant sike
Ive had my trip
thru the smoking exhaust when my
rings went bad it was just that.it wasnt that bad though I see some cars on the road looks like a they have a fog machine hooked up to the back.
_________________
1979 porsche 924 Na
1980 porsche Turbo 931GT Replica
Have u ever driven a turbo.

MunkPuppy · Posted: Sun Sep 14, 2003 7:28 pm Post subject:

Joes924Racer - I think it's about time you got hooked on phonics

_________________
'80 931 FOR SALE

"It's a shame that stupidity isn't painful"
-Anton Szandor LaVey

wdb · Joined: 02 Nov 2002 Posts: 2024

porschetroy · Joined: 30 Dec 2002 Posts: 32 Location: Sacramento

Oh yeah! WDB nailed that on the head. I was reading this thread & thinking, "How the hell WOULD brake fluid get into the intake?" Funny thing is I just removed my brake booster last weekend to repair a cracked firewall and guess what, the SOB was full of brake fluid! Apparently, the master cylinder is leaking at the rear - directly into the brake booster. That's why the bottom of my booster is rusted and why my new blue fuid seems to disappear without any signs of leakage. It probably has a negative effect on the "power" brake function as well. I'll find out later today when I get it all back together. I don't think the fluid ever made it up to the vacuum hose and got into the engine, but it's entirely possible if the fluid can't get out of the booster at the master cylinder gasket as mine did. Bottom line - if your brake booster is missing the paint on the bottom half and starting to rust, pull the master cylinder and see if it has leaked into the booster.

To contribute somewhat to this thread...What does the white smoke smell like? Stand behind it and let a friend start it up. You should be able to tell if it is oil. -Troy

dwak · Joined: 03 Nov 2002 Posts: 839 Location: Eastern Ontario

I think I better start rebuilding my spare turbo too. I was running down this annoying VW Jetta who passed me when I was cruising along at 110 mph when I noticed puffs of smoke pouring out my cars back end. I immediately backed off and ate crow. I mean, how can you look good passing someone when smokes billowing out?

dwak

MunkPuppy · Posted: Mon Sep 15, 2003 3:28 pm Post subject:

my sentinemts exactly, dwak! I'm not worried about oil loss, as I always check my fluid levels and top up when needed, but it's the embarassment factor. Who's going to look at me in awe and jeaslousy, when my car is billowing smoke out the tailpipe?

_________________
'80 931 FOR SALE

"It's a shame that stupidity isn't painful"
-Anton Szandor LaVey