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Catch can issues?

Started by vl5speed vbmenu_register("postmenu_1664307", true); · 11 Dec 2007 · 29 replies

Preserved from CalaisTurbo (partial recovery). Original authors and dates are shown; archived members are not current Holdcom accounts.

Hey just installed a catch can on the vlt with proper breather fitting etc etc, now the ocasialy blows white smoke on idle or while driving smells oily do i miss something?? Some original photos have not been recovered yet.
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pic.. of the whole engine bay.
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Sounds very familiar, try the search, seem to recall someone else had similar issue with white smoke after a catch can change, any time in last 3 months...
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well now that your venting oil to atmo of course your going to smell it... White smoke may be a different issue, could be just a conicidence that it has happened now... Where is the can mounted?
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Quote: Originally Posted by Hingo well now that your venting oil to atmo of course your going to smell it... White smoke may be a different issue, could be just a conicidence that it has happened now... Where is the can mounted? i have search couldnt find any threads similar to this... Could be conicidence but i doubt it, catch can is mounted along side the canister ?
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Quote: Originally Posted by vl5speed Hey just installed a catch can on the vlt with proper breather fitting etc etc, now the ocasialy blows white smoke on idle or while driving smells oily do i miss something?? i have the same problem and its blowing oil out of the top filters of my catch cans what should i do i have the same prob and its blowing oil out of the filters on top of my catch cans checked to see if they were full and they were empty the pipes only go into the catch cans they do not go back into the motor Some original photos have not been recovered yet.
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same prob with mine, and iv been told to fix it by using bigger fittings and lines for the catch can, i havnt done it yet as i havnt had time. but that should solve your probs. all its doin is buildin up huge amounts of pressure causing it to lift the oil up and out ur breathers, if the pressure is released better it wont lift the oil. therefore use bigger fittings/lines Blake Some original photos have not been recovered yet.
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lol post up pics of the setup, incorrectly setup pcv systems can result in some of these problems
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Quote: Originally Posted by MadVK308 lol post up pics of the setup, incorrectly setup pcv systems can result in some of these problems got my pcv blocked. got vented catch can
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Quote: Originally Posted by VLXGTS got my pcv blocked. got vented catch can so you run 2 hoses from your rocker cover to your catch can, which is vented?
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Quote: Originally Posted by MadVK308 so you run 2 hoses from your rocker cover to your catch can, which is vented? yep, all i need is bigger rocker cover fittings and bigger lines and it should be sweet
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you got alot of blow by? Or you running alot of boost?
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Quote: Originally Posted by MadVK308 you got alot of blow by? Or you running alot of boost? blow by but i think its coz of the pressure buildup coz i have small lines to catch can. and forgies allow extra room causing a bit more blowby
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yeah I had mine vented, but the smell gave me a headache lol
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Quote: Originally Posted by MadVK308 yeah I had mine vented, but the smell gave me a headache lol yeah i know it drives me insane, i think u have to seal the firewall up good so you dont smell it ay.
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You could try using the catchcan as a filter inline with the normal pcv system. It doesn't stink and you get better pressure relief than when going to a vented setup because returning to the inlet means the pressure is still being sucked out to some extent rather being forced into restriction, like a vented can. Some big HP cars run a vacuum pump to further relieve crankcase pressure and make the engines job easier, thereby releasing more power. Plus it's a legal way of doing it
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do you have any pics of this setup?
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Quote: Originally Posted by VLT-025 You could try using the catchcan as a filter inline with the normal pcv system. It doesn't stink and you get better pressure relief than when going to a vented setup because returning to the inlet means the pressure is still being sucked out to some extent rather being forced into restriction, like a vented can. Some big HP cars run a vacuum pump to further relieve crankcase pressure and make the engines job easier, thereby releasing more power. Plus it's a legal way of doing it yeah thats how I have mine setup now. Inbetween the line from the plenum to the rocker cover I have my catch can.
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i was told that you leave the pvc as is (factory) and then run the hose from thre rear of the rocker to one fitting on the can and then the other to another fitting on the intercooler piping.. Duno if its correct ::
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Quote: Originally Posted by vl5speed i was told that you leave the pvc as is (factory) and then run the hose from thre rear of the rocker to one fitting on the can and then the other to another fitting on the intercooler piping.. Duno if its correct :: No no no no, what u are doing is pressuring your crankcase with boost pressure. run it like this rocker cover => catch can = > inlet pipe infront of turbo
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