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Beginning to see good amounts of smoke.

ROH ECHT

ROH ECHT

K04 PLAY
Location
PDX OR
Car(s)
2007 MKV GTI
Only seeing the smoke when I get into boost and immediately following. I suppose a compression test is due first thing. And then I may be looking at valves, guides, and rings. I have been expecting this to come one day, but hoped it to hold off for a few more years. I plan on adding a set of rods to the list for a future turbo mod. My boost peaks at 24.2psi and reduces to 20.0 at redline.

Open to comments. :thumbsup:

You can see what I mean at 3:03:
https://www.youtube.com/watch?v=C5SdXgCXbrw#t=168
 
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Red5pade

Red5pade

.
Location
Pikeville, KY
Car(s)
Subaru
have you ruled out a cracked valve cover or bad seal on it or the pcv revamp?

i mean, it could be the turbo. youve had it awhile and wasnt shy on the boost, but you never overspooled it. well technically you did by oem standards but you didnt really. theres guys pushing these turbos a lot harder than you have. id say its getting tired if it is the turbo.

does it have shaft play?
 
ROH ECHT

ROH ECHT

K04 PLAY
Location
PDX OR
Car(s)
2007 MKV GTI
I haven't approached anything yet. Only speculating at this time although I recently ran data on it. I had some issues with the W/G adjustment a few years ago and it was boosting over 30psi briefly. Only for a data test or two.
I too thought that the turbo bearings is a major point of interest...and why I have been looking into my next step with it. I just think a proper process would more suit me economically. I think compression testing would point to the block and head...and if that looks good, perhaps the turbo. Just very unsure as to my approach with the investigation!?

But you believe a loss in manifold pressure could cause this? What else would that effect though? Everything operates normally at this time...boost, fuel, intake air mass and no codes. I would think a loss in manifold prressure would show wouldn't it?
 
Red5pade

Red5pade

.
Location
Pikeville, KY
Car(s)
Subaru
manifold pressure with be okay on logs but will cause smoke... did for me anyways. car ran fine, just smoked like a train. if its your turbo, then it should sound like a drill. outside of that, id look elsewhere
 
ROH ECHT

ROH ECHT

K04 PLAY
Location
PDX OR
Car(s)
2007 MKV GTI
Thank you. Turbo sounds real good so, a crack in the valve cover will still look OK on data? Is that what you are saying is how yours was?
 
R

RRacerguy717

Go Kart Champion
Location
ny tristate
ROH ECHT said:
Thank you. Turbo sounds real good so, a crack in the valve cover will still look OK on data? Is that what you are saying is how yours was?
Click to expand...

Check compress and mark and monitor your fluid levels both coolant and oil. First thing is to see if its oil or coolant smoke both will be white smoke.

Take pic's and post of your plugs when you pull them do a compression test .

Do a proper compression test pulling all plugs at once , make sure you spin the engine over like 15 sec constantly per cyl then put like 2 oil can squirts of oil and recheck compression, generally if the rings are worn out you will see good increase in compression.

This above will give you the data so you can rule out things one at a time, I see so many people jump to conclusions and they miss the prob and cost them ton of money.

Areas that could be causing you prob below to lool at .

1) crack in valve cover or failing pcv system .
2) Poorly vented pcv/catch can building pressure pushing oil past.
3) worn valve seals
4) worn rings
5) bad oil seal in turbo
6) starting of failing head gasket through water jacket


Good luck Bob G
 
freshpots

freshpots

r'zub n t'zug
Location
Canada
Car(s)
'22 GTI, '19 GT350R
Would this kind of smoke be a similar issue to that of having a shitload of black soot coming out of the exhaust? My hatch goes from white to black realllly quick.
 
ROH ECHT

ROH ECHT

K04 PLAY
Location
PDX OR
Car(s)
2007 MKV GTI
RRacerguy717 said:
Check compress and mark and monitor your fluid levels both coolant and oil. First thing is to see if its oil or coolant smoke both will be white smoke.

Take pic's and post of your plugs when you pull them do a compression test .

Do a proper compression test pulling all plugs at once , make sure you spin the engine over like 15 sec constantly per cyl then put like 2 oil can squirts of oil and recheck compression, generally if the rings are worn out you will see good increase in compression.

This above will give you the data so you can rule out things one at a time, I see so many people jump to conclusions and they miss the prob and cost them ton of money.

Areas that could be causing you prob below to lool at .

1) crack in valve cover or failing pcv system .
2) Poorly vented pcv/catch can building pressure pushing oil past.
3) worn valve seals
4) worn rings
5) bad oil seal in turbo
6) starting of failing head gasket through water jacket


Good luck Bob G
Click to expand...
Thanks for that. I was in need of putting all my thought in order so I could work through the necessary steps in order to pinpoint the problem. This helps and addresses my points of concern. I will get started beginning with the pcv fix and valve cover.
Reinstalling the oem pcv would tell me noting right? I have a BSH Stage1 pcv fix. I don't see how to check whether or not there is a crack inside the valve cover other than removing it and inspecting it on the inside where the pcv ports are.

Do you mean have all of the plugs removed, but gauge the pressure in one at a time or gauge all four at the same time?
 
G

GIACUser

Master Wallet Mechanic
Location
USA
Car(s)
MK 6 GolfR
freshpots said:
Would this kind of smoke be a similar issue to that of having a shitload of black soot coming out of the exhaust? My hatch goes from white to black realllly quick.
Click to expand...

Black is generally unburned fuel, fairly common if you are running a hi flo or no catalytic convertor and an aggressive tune will also play into it.
 
G

GIACUser

Master Wallet Mechanic
Location
USA
Car(s)
MK 6 GolfR
RRacerguy717 said:
Check compress and mark and monitor your fluid levels both coolant and oil. First thing is to see if its oil or coolant smoke both will be white smoke.

Take pic's and post of your plugs when you pull them do a compression test .

Do a proper compression test pulling all plugs at once , make sure you spin the engine over like 15 sec constantly per cyl then put like 2 oil can squirts of oil and recheck compression, generally if the rings are worn out you will see good increase in compression.

This above will give you the data so you can rule out things one at a time, I see so many people jump to conclusions and they miss the prob and cost them ton of money.

Areas that could be causing you prob below to lool at .

1) crack in valve cover or failing pcv system .
2) Poorly vented pcv/catch can building pressure pushing oil past.
3) worn valve seals
4) worn rings
5) bad oil seal in turbo
6) starting of failing head gasket through water jacket


Good luck Bob G
Click to expand...

Great checklist. I have had trouble with #1. The gasket had just become compressed and no longer did the job. Just replaced gasket.

Needless to say check the easy inexpensive causes first.
 
J

Jet08

Ready to race!
Location
Australia
For the compression test you need to remove all the spark plugs and test 1 cylinder at a time also you need to disconnect the fuel injector harness. You don't want fluid in the cylinder when doing the dry test part.
 
ROH ECHT

ROH ECHT

K04 PLAY
Location
PDX OR
Car(s)
2007 MKV GTI
GIACUser said:
Great checklist. I have had trouble with #1. The gasket had just become compressed and no longer did the job. Just replaced gasket.

Needless to say check the easy inexpensive causes first.
Click to expand...

Jet08 said:
For the compression test you need to remove all the spark plugs and test 1 cylinder at a time also you need to disconnect the fuel injector harness. You don't want fluid in the cylinder when doing the dry test part.
Click to expand...
I appreciate the responses...thank you both!
 
ROH ECHT

ROH ECHT

K04 PLAY
Location
PDX OR
Car(s)
2007 MKV GTI
Today I injected a mixture into the IAT sensor port of 16oz of both Min. Spirits and NAPHTHA...8oz each of alcohol, acetone, and fuel. Let it run for a bit and then drove for 20 minutes between 2k and 3k rpm. Then I floored it at 40 mph and there was no smoke. Tomorrow I am taking a couple of "after" bore-scope pics to see the results.

I still do not know if having a BSH Stage1 pcv fix would show the smoke symptoms as was mentioned if the valve cover was cracked inside where crankcase air would flow if I did have the oem pcv still connected. It was mentioned that it may be cracked, but I see that it wouldn't matter since I have the pcv fix. Am I wrong to believe this?
 
G

GIACUser

Master Wallet Mechanic
Location
USA
Car(s)
MK 6 GolfR
This will be interesting. Could be crack in valve cover or something plugged up giving you too much crankcase pressure and some blowby as a result? Maybe time for rings, don't know the mileage but compression test, look at the plugs can tell you if it is time to freshen things up.
 
ROH ECHT

ROH ECHT

K04 PLAY
Location
PDX OR
Car(s)
2007 MKV GTI
GIACUser said:
This will be interesting. Could be crack in valve cover or something plugged up giving you too much crankcase pressure and some blowby as a result? Maybe time for rings, don't know the mileage but compression test, look at the plugs can tell you if it is time to freshen things up.
Click to expand...

I know my plugs were perfect at 110k(now at 111.5k). But I still want to run the comp tests. I added 1/2qt of oil yesterday, but only 1/4qt was needed to reach the level it was at following the oil change at 110k as I went to the top of the fill line on the dip a day ago.
I will post my after bore pic tomorrow.
My before bore-scope today...valve stem and a bit of the valve head:

 
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