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11-18-2012, 12:49 AM | #1 |
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Vehicle:2003 WRX w STI V8 |
Oil Consumption Under Boost?
Ok, So I have researched and looked and need an answer.
If I hammer on the car I get pretty bad oil consumption. I'm currently using Kandall 5W40 Synthetic (apparently highly regarded). Before the Catch Can I noticed my intercooler was caked with oil, as well as my turbo. All coming from blow by. So I added a Catch Can (no more oil in intercooler). Now that the can is in I'm still losing a lot of oil (1 quart) in about 1000km's or less. But here is the catch, it's not in the can, but to be frank I have put those metal scrubbing pad so Its probably gunked up in there). So...Can the oil be crappy and deteriorating/burnt up (I have no clue)? Anywho I'm going to switch to T6 5w40 tomorrow. -My car fires up very fast on a cold start (0°c, coldest so far) -No Smoke from the Oil Cap -No white smoke from the tail pipe after condensation disappears (no cats) -If I don't go into boost, I don't consume. I should do a compression/leak down test and possibly cry. What do you guys think?
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11-18-2012, 02:44 AM | #2 |
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change the pcv valve
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11-18-2012, 09:21 AM | #3 |
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11-18-2012, 06:46 PM | #4 |
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11-18-2012, 09:03 PM | #5 |
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What I ment to say was that from the vacuum/boost source from the manifold in which the PCV system hooked up to has been bolted shut. Then the PCV valve was removed and also bolted shut. I have a breather hose from the block routed near the radiator (needs a can seteup there) and have a hose coming from the collector of the heads going to a catch can. So my intake doesn't have any oil being routed back in incase of blow by.
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11-18-2012, 09:18 PM | #6 | |
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Quote:
you are gonna blow something up doin that really ya dont know what you are doing |
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11-18-2012, 09:23 PM | #7 | |
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11-18-2012, 10:36 PM | #8 |
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I was told to do it this way. Whats wrong with this setup. I may not have worded it correctly.
Crankcase venting (eventually will go to catch can) and head breathers to catch can. At vacuum since the PCV valve has been removed the crankcase fumes are not being sucked back into the motor but venting. Last edited by OC_Nooby; 11-18-2012 at 11:12 PM. |
11-19-2012, 09:43 PM | #9 |
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Still wondering?
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11-20-2012, 05:32 PM | #10 |
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Uncle Scotty? eg33GC? Can you explain why? You both seem to have the same opinions and id just like to hear why.
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11-20-2012, 06:42 PM | #11 |
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oil
Crawford would be the best to get?
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11-20-2012, 07:31 PM | #12 |
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My issue isn't with the catch can, I'm curious as to why its bad to just remove the pcv valve and keep everything else in tact.
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12-06-2012, 06:43 PM | #13 |
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Well I ran the car for 400km's and would say I consumed about 100 ml - 200 ml. I was driving the car slowly but there where moments where it was under heavy loads going uphill but not going into boost. I've been driving the car now under boost for 50km's and I can't get a very accurate reading, I'm sure its down. Tomorrow I'll be doing the leak/compression test and get this over with.
eg33GC/Uncle Scotty if your going to say not to do something why not explain why not to do it? I've been reading around and I really don't know why the stock PCV system can't be routed the way I have it, minus the emissions... |
12-06-2012, 06:51 PM | #14 |
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It is bad because you're building pressure in the crank case and there is nothing the motor can do to release pressure because it's valve is missing!
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12-06-2012, 07:10 PM | #15 |
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^wrong. He is venting it to atmosphere.
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12-06-2012, 07:11 PM | #16 |
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No valve means constantly relieving pressure. So no buildup.
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12-06-2012, 08:09 PM | #17 | |
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12-06-2012, 10:37 PM | #18 |
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12-07-2012, 06:10 PM | #19 |
Scooby Specialist
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Crankcase to atmosphere, heads to catch can. Crankcase is not bolted SHUT!, THE PCV hooks up to the manifold and the T in the crankcase. So the PCV is removed and the manifold has a bolt and the T has a bolt.
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