Help!!!!!
Have 52 plate 911 C4, which smokes very heavily on start up from cold, but clears completely after 2 or 3 minutes of normal driving. It's actually quite embarrasing. Anyone know what this might be?
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| Smoking Carerra4. https://forums.tipec.net/viewtopic.php?f=8&t=12836 |
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| Author: | RickyLeeds [ Tue Apr 24, 2012 5:36 pm ] |
| Post subject: | Smoking Carerra4. |
Help!!!!! Have 52 plate 911 C4, which smokes very heavily on start up from cold, but clears completely after 2 or 3 minutes of normal driving. It's actually quite embarrasing. Anyone know what this might be? |
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| Author: | Sean Smallman [ Tue Apr 24, 2012 6:16 pm ] |
| Post subject: | Re: Smoking Carerra4. |
What colour is the smoke? |
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| Author: | jmgarage [ Mon May 07, 2012 12:47 pm ] |
| Post subject: | Re: Smoking Carerra4. |
Sounds like an air oil separator gone west. |
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| Author: | daveyb [ Tue Aug 21, 2012 11:20 am ] |
| Post subject: | Re: Smoking Carerra4. |
Yep, I'm having the same issue. Nothing for a couple of weeks, then the next 4 start ups I fill the street with smoke. It clears after a minute or two. But if the AOS has gone, wouldn't it smoke more often, and also when running? Dave |
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| Author: | jmgarage [ Thu Aug 23, 2012 9:49 pm ] |
| Post subject: | Re: Smoking Carerra4. |
AOS failure tends to cause smoke on startup. The cause is oil trickling down the intake while the car is stood, which pools and is burned on startup. A quick test is to remove the oil filler cap while the engine has been running for a few moments, if it feels more difficult to remove with the engine running, than when it is not, (caused by a severe vacuum pulling on the cap) then the AOS has failed. We use a manometer with an oil filler cap connected to one end to test cars in the workshop. |
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| Author: | thirteeneast [ Fri Sep 07, 2012 12:17 pm ] |
| Post subject: | Re: Smoking Carerra4. |
http://www.renntech.org/forums/topic/39 ... a-bad-aos/ |
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| Author: | jmgarage [ Fri Sep 07, 2012 1:47 pm ] |
| Post subject: | Re: Smoking Carerra4. |
Yep, thats a kind of home brew version of what we use. Might be a bit too much effort for just the one car, but for a group of friends it might be worth putting together and sharing. |
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