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11-22-2011, 11:03 PM | #1 |
Scooby Newbie
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Join Date: Jun 2006
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Excessive Oil consumtion ! valve guide ?
my car is burning ton of oil ! The valve guide have about 140k miles on them but my machinist check and said that they still in good condition . i change new seal twice still having the same problem .I just pull the manifold off today to look at the exhaust guide and almost all of them have oil around them. any help would be great
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11-23-2011, 09:23 AM | #2 |
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Vehicle:04 UMS Tuned sti Turns out it's Black! |
I've been told by my machinist that a small amount of oil accumulation around that is normal...
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11-23-2011, 09:31 AM | #3 |
Former Vendor
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Vehicle:Many Track Records Let us help you go fast! |
have you done at least a compression or leak down?
have you pulled the turbo to see if those seals are leaking (provided you have a turbo car)? |
11-23-2011, 11:56 AM | #4 |
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I have done all of the above . Everything check out fine. When I'm in boost the car puff a big cloud of black smoke .
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11-23-2011, 12:30 PM | #5 |
Scooby Specialist
Member#: 289606
Join Date: Jul 2011
Location: Atlanta
Vehicle:06 WRX white |
what color are the valve stem seals on the exhaust?
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11-23-2011, 09:42 PM | #6 |
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the seal are blue on the exhaust brown on the intake super tech seals. brought the head to anther shop they guy said the same thing the guide are still in good condition. funny thing is that all 4 cylinder burn oil.
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11-24-2011, 02:41 AM | #7 |
Scooby Specialist
Member#: 289606
Join Date: Jul 2011
Location: Atlanta
Vehicle:06 WRX white |
I've never used the Supertech seals. It could be a bad set of seals.
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11-24-2011, 08:58 AM | #8 |
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Location: Sioux Falls, SD
Vehicle:I <3 Lamp |
Have you looked into a bad turbo seal or an improperly set up crankcase ventilation set-up?
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11-24-2011, 04:08 PM | #9 |
Scooby Guru
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Vehicle:06 Wrx RWD Auto 76MM-AEM-2200's |
^thats something to look into as well.
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11-25-2011, 02:01 PM | #10 |
Scooby Newbie
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Yea I have check all that ... I have used oem seal as well same problem. That why I'm clueless
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11-26-2011, 12:49 PM | #11 |
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I agree. You may want to check and make sure your PCV system is working properly. It sounds like your crankcase is building pressure and its forcing oil out thru the exhaust guides.
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11-26-2011, 01:11 PM | #12 |
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Vehicle:2002 impreza WRX JDM blue |
PCV system hoses tend to harden by the age due to heat and they somehow make worst seal on connections. can it make vacuum leaks in ventilation system>pressure in crankcase>oil burning?
when I was reassembling pcv hoses, they were hardened like a plastic and they were loose on connections |
11-26-2011, 01:56 PM | #13 |
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Vehicle:10.8 XT+9.2@155 GR+ 9.1/157mph 2015 STI |
PCV is probably your problem
You check the valve stem to guide clearance? Valve guide issues are usually noted when the car sits at idle for a while and you rev it. It will billow smoke. |
11-26-2011, 04:23 PM | #14 | |
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Vehicle:02 hybrid/6speed 01 2.5 RS sedan |
Quote:
How much oil are you burning? Like in 1k miles.... Black smoke =fuel Blue smoke = oil White smoke/steam = coolant /water |
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11-27-2011, 04:15 AM | #15 |
Scooby Newbie
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Join Date: Jun 2006
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my pvc system is vented to the atmosphere. i got 2 line from the valve cover and one from the pvc nibble . I check the guide to valve clearance and it about .003-.004 thou . I also looked at the valve today all 4 cylinder burn oil pretty evenly .The carbon build up is on the valve face not on the stem so it probably not the guide. maybe thru the ring ? compression and leak down are good
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