Comp test with more questions.Help!

[4g63t]

Alright im going to try to explane this the best I can. I have a 93 tsi. I just put a 2g manifold on my car because my tubular one cracked. So I took off my turbo and put the different manifold on, put it back to gether and drove it. About 10 min later my car started to smoke like a Bit@h. I am going to upload a video as soon as I can. My turbo is not blown because there is no oil in my intake pipes it is all dry. The only thing I have questions about with the turbo its a gerrett core so the bolts going to the exhaust side and around them seem to be oily is there some sealent or some way to torq them down. Is there a special way so oil dosent come out? Here are some picturs to help explane what I mean. Sorry for the quality.
http://s137.photobucket.com/albums/q218/lelej1080/?action=view&current=000_3876.jpg

These are from close to under the tubo.

http://s137.photobucket.com/albums/q218/lelej1080/?action=view&current=000_3875.jpg
http://s137.photobucket.com/albums/q218/lelej1080/?action=view&current=000_3874.jpg


I was thinking it is eather the oil on the turbo geting into the exhaust side of the turbo and making it smoke or my rings/valve seals/ hg is shot. I built my engine about 3000 miles ago and it still runs vary vary strong. I just did a compression test and I got 130 140 130 140.... I thaught it should be higher because I just rebuilt it. Please I need all the help I can get so I cant get this smoke machine running good and to the track. I will check this often and try my best to help awnser your questions. THANK YOU

 

[92DSMErdrick]

What kind of pistons are you running? Those numbers seem alittle low for a rebuild 3000 miles ago. I had 170 compression with 2g pistons in my 1g. By the time my motor was crankwalking 14k miles later I had around 160 in 3 cylinders and 150 in one other. See if you can get a hold of a leakdown tester to check your valves and everything else

My bad i just read ## profile. Yea your numbers are alittle low for the pistons your running

 

[absolute_DSM]

Do a wet compression test to check the rings to rule that out.

Does it smoke all the time? idle, low/high vac, WOT?

 

[4g63t]

It does not smoke at idel but at low med and wide open throttel it does. I was testing it wrong I had all the plugs in except the one I was testing. So I pulled them out and i got 140 150 140 150. any good links on how to do a leak down test I dont understand how to do it. I have read how to do them befor but dont understand it. I will get a video of it up later tonight when I get home to show you how bad it is. The service limint of a 1g is 121 and max is 165. But I have 8:5:1 so im not sure.


EDIT here is the link to the video of it smokeing
http://s137.photobucket.com/albums/q218/lelej1080/?action=view&current=aa6325c4.flv

 

[4g63t]

Any one help me on this?

 

[LaN-]

I would take the turbo off and take a look at the exhaust wheel. It sounds like your smoking from the turbo. Even though your intake is clean its still a possibility.

Since your only leaking at mid / high RPM's it sounds like once your car builds up a decent amount of oil pressure its leaking out of the turbo.

If it was the engine you'd be leaking all the time.

How long were you running the turbo with the cracked manifold? Maybe you ended up running it to hard.


As for the compression, are you on stock cams? If not then thats why your compression is dropping and its not a big deal.

If you are on stock cams i'd do a wet compression test before doing a leak down test (its easier). Just put a small amount of oil in the cylinder and do a normal comp test. If the comp shoots up really high then the rings are a little worn. If it doesn't move much then its the valves or head gasket.

If you are on stock cams and it looks like the rings are a little worn, i honestly wouldn't worry about it. The most important thing is that the compression is even.

Also you might wanna try a different compression gauge.

Let me know.

 

[daren_p]

Just to verify, when you did your compression test you had the throttle plate all the way open (ie WOT)?

 

[4g63t]

Since your only leaking at mid / high RPM's it sounds like once your car builds up a decent amount of oil pressure its leaking out of the turbo. .

I was just starting to look into the oil pressure being to much. I just put a oil reducer valve in my oil feed line like what people use on bb turbos. I have the valve about half shut it seems to help a little but it still was smokeing maybe its from the oil in the exhaust still but I havent actuly driven it to relly tell.

How long were you running the turbo with the cracked manifold? Maybe you ended up running it to hard.

Probauly 100 miles of in town driving.

As for the compression, are you on stock cams? If not then thats why your compression is dropping and its not a big deal.

I am running dks 264 272, with a ported head if that makes a difference.

Just to verify, when you did your compression test you had the throttle plate all the way open (ie WOT)?

I did bolth with it open and with it shut, it did not make a noticable difference, I had a battery charger hooked up to it and all the plugs out with it at operating tempature.


THank you!

 

[LaN-]

how long ago did you put that oil reducer on? That could very well be the problem. If you have to much oil pressure your suppose to port your oil relief valve.

Since you have cams thats why your compression is low, don't worry about it. If you want to understand more do a search on lower compression with cams.

Give me a timeline on when you replaced the manifold, put the oil reducer in and the smoking issue.

 

[4g63t]

I replaced the manifold the same day it started smoking and i just put on the reducer im going to go try to drive it and see if it is any beter. I just got back from out of town.

 

[4g63t]

the reducer helped the smoke but it sill was smoking. I might of figured it out i think when i took my turbo off and put it back on for the cracked manifold I put to much rtv on the turbo dran line so maybe it shut the hole causeing the oil pressure in the turbo to be to much so it leaks ima take off the drain tomarow and look close at it. I hope thats the problem!!!

 

[LaN-]

the reducer helped the smoke but it sill was smoking. I might of figured it out i think when i took my turbo off and put it back on for the cracked manifold I put to much rtv on the turbo dran line so maybe it shut the hole causeing the oil pressure in the turbo to be to much so it leaks ima take off the drain tomarow and look close at it. I hope thats the problem!!!

if the turbo smokes it means the seal is shot and there isn't much you can do. I could be wrong, but thats the impression i'm under.

Looks like you might be looking into a rebuild on that turbo. If thats the case get rid of that reducer and port your relief valve.

 

[4g63t]

Alright thanks alot!!