Went single, excessive crank case pressure
08-22-13, 06:57 PM
#52
Yeah I'm thinking a bad side seal and oil control ring, if I drive it I can't tel if its smoking but when I stop it takes a few seconds and smoke comes pouring out the exhaust and I can see the smoke coming from the catch can under the hood. Pretty sure it's rebuild time again 
08-22-13, 10:15 PM
#53
Original Gangster/Rotary!
iTrader: (213)
Well any time I get confused for Johnny 'Sexay Lips' H-Borg it's a good day 
Hard to say at this point what the problem is. You'll need to do more investigation, but it ain't lookin' good.
Hard to say at this point what the problem is. You'll need to do more investigation, but it ain't lookin' good.
08-23-13, 12:05 AM
#55
talking head
as suggested maybe you need to get a dummy t4 turbine housing and then plate over where the CHRA was and also run an old wheel bolt or stud as the oil supply banjo and run the engine
if the catch system is sealed in anyway then that will also cause the issue .. and for sure it should have a mild vacuum from air cleaner or purge valve applied across it
but am suspecting also you have excessive blowby across the sides of the rotors , be it cracked corner seal.. nibbled side seals.. or lack of rotor land clearance messing up the plate
if the catch system is sealed in anyway then that will also cause the issue .. and for sure it should have a mild vacuum from air cleaner or purge valve applied across it
but am suspecting also you have excessive blowby across the sides of the rotors , be it cracked corner seal.. nibbled side seals.. or lack of rotor land clearance messing up the plate
08-23-13, 05:50 PM
#62
Original Gangster/Rotary!
iTrader: (213)
I'm not sure why you keep saying this..... if the crankcase is smoking badly without a cap at all, a filter isn't going to make any difference whatsoever.
Oil in the intercooler piping has nothing to do with this IMO.
It's not the turbo. Most likely it's the engine---turbos will not cause oil dipsticks to shoot out from pressure.
Oil in the intercooler piping has nothing to do with this IMO.
It's not the turbo. Most likely it's the engine---turbos will not cause oil dipsticks to shoot out from pressure.
08-24-13, 10:15 AM
#63
I'm not sure why you keep saying this..... if the crankcase is smoking badly without a cap at all, a filter isn't going to make any difference whatsoever.
Oil in the intercooler piping has nothing to do with this IMO.
It's not the turbo. Most likely it's the engine---turbos will not cause oil dipsticks to shoot out from pressure.
Oil in the intercooler piping has nothing to do with this IMO.
It's not the turbo. Most likely it's the engine---turbos will not cause oil dipsticks to shoot out from pressure.
I've been wrapping my head around it and it is most likely internal.
Just make sure u check all simple fix possibilities and do a compression test before pulling the motor.
The bigger question is if its internal what do u need to change in your tune to prevent it from happening again.
08-25-13, 01:14 AM
#65
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02-02-14, 10:59 PM
#68
For future venting its best to run a vent from each side of the motor. I will run a line from the rear turbo oil drain from the stock twins to a catch can and a tube from the fill neck to the catch can. Make sure your can is a vented can with dual inlets.
Been doing it this way for years with no problems.
Been doing it this way for years with no problems.
02-26-14, 03:35 AM
#69
well got the motor all rebuilt and when we had it torn apart then only flaw we could find was just a little tiny chip out of the smaller control ring, the o-ring was still good and all the other seals still looked amazing, I replaced the all anyways. Installed the motor in my car and it started right up, I had the usual smoke on first start up but after 10mins or so it cleared right up and no more smoking. Now time to break it in and start boosting to see what a gt3574r can do 
02-26-14, 07:15 PM
#70
For future venting its best to run a vent from each side of the motor. I will run a line from the rear turbo oil drain from the stock twins to a catch can and a tube from the fill neck to the catch can. Make sure your can is a vented can with dual inlets.
Been doing it this way for years with no problems.
Been doing it this way for years with no problems.
02-26-14, 07:41 PM
#71
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Glad you got it sorted. From my past turbo builds (pistons motors :p) you should have the oil restrictor fitting pointing downwards towards the turbo bearings. Remove the fitting if you can and test the flow both ways and you'll see why. It trickles oil the way you have it. And squirts with it pointed down with the big end facing the oil line (unless you already did this)
04-01-14, 05:05 PM
#72
Sorry, to bring this old thread back up but I am having the same problem.
Engine has less then 10 miles on it.
turbo did need to rebuilt since the seal was bad.
still smoked only after oil started getting back to the turbo from the feed line, I put a restrictor on it and it did stop a little bit.
Also at first before i took the turbo off to get rebuilt i took the feed line out and ran it to a bottle and the smoked stopped completely.
So i will try turning the restrictor the other way like Bezrx7 has mention and see if that helps.
Catch can is done properly and all.
Engine has less then 10 miles on it.
turbo did need to rebuilt since the seal was bad.
still smoked only after oil started getting back to the turbo from the feed line, I put a restrictor on it and it did stop a little bit.
Also at first before i took the turbo off to get rebuilt i took the feed line out and ran it to a bottle and the smoked stopped completely.
So i will try turning the restrictor the other way like Bezrx7 has mention and see if that helps.
Catch can is done properly and all.
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