Niko Posted 21January, 2015 Report Share Posted 21January, 2015 Latest article from PELICAN PARTS for that all to common puff of smoke on start up. http://www.pelicanparts.com/techarticles/Porsche_911/03-ENGINE-Oil_Inlet_Check_Valve_Installation/03-ENGINE-Oil_Inlet_Check_Valve_Installation.htm?utm_source=pelican_porschenewsletter&utm_medium=email&utm_campaign=20150121 Quote Link to comment Share on other sites More sharing options...
tazzieman Posted 21January, 2015 Report Share Posted 21January, 2015 Check valve part is $AU392 , plus new S hose plus oil change. If someone did the work for you , probably $700 all up For a non-harmful "cosmetic problem" caused by lack of driving? Seriously clutch-monkey and Caledonian 2 Quote Link to comment Share on other sites More sharing options...
clutch-monkey Posted 22January, 2015 Report Share Posted 22January, 2015 what puff of smoke on startup?? Quote Link to comment Share on other sites More sharing options...
Caledonian Posted 22January, 2015 Report Share Posted 22January, 2015 Prior to my recent engine drop to fix a few oil leaks i used to get the puff of smoke on start up, regardless of the time between drives. Now it only happens when (as Tazzieman pointed out) she is not driven for a bit, I'm putting this down to replacing the missing restrictor in the engine breather to oil tank hose. My engine has done less than 20k since it was totally re-built, so I would agree that it's not worth (to me) to spend the $$ on something that not really a problem. Possibly in some of the US states this may be an issue to get their version of a roadworthy, maybe this is where some demand for the fix came from? Quote Link to comment Share on other sites More sharing options...
tazzieman Posted 22January, 2015 Report Share Posted 22January, 2015 The PP blurb There is nothing worse than having all eyes on you as you step into your 911 only to have a gigantic smoke screen come from the exhaust on start up. There is something worse - the bill from the engine work required to remedy the wear and tear that reflects this scenario! I have never seen the gigantic smokescreen on any 911, and the occasional start up puffs are hohum - you wouldn't get one at an emissions testing station unless you parked it outside a couple of days before anyway. Quote Link to comment Share on other sites More sharing options...
Tit Posted 22January, 2015 Report Share Posted 22January, 2015 I just switched from mineral to synthetic and had a bit of a smoke festival after two weeks of sitting. The previous mineral oil didn't smoke at all. I reckon I would have been tempted to buy this on that day! I can't really drive the 964 during the week and if I have a busy weekend or two then it could sit for two or three weeks. Therefore smoke on startup... Quote Link to comment Share on other sites More sharing options...
tomo Posted 22January, 2015 Report Share Posted 22January, 2015 Bit like the old Trumpys and BSA motor bikes If they did not blow smoke you would start to worry Quote Link to comment Share on other sites More sharing options...
Peter M Posted 23January, 2015 Report Share Posted 23January, 2015 The old 911 equivalent to: http://www.depend.com.au/?gclid=CI-VvbLvqMMCFQEDvAod6X0A9A Niko and tazzieman 2 Quote Link to comment Share on other sites More sharing options...
tazzieman Posted 23January, 2015 Report Share Posted 23January, 2015 Peter , so knowledgeable , how? Peter M 1 Quote Link to comment Share on other sites More sharing options...
JustJames Posted 23January, 2015 Report Share Posted 23January, 2015 Bit like the old Trumpys and BSA motor bikes If they did not blow smoke leak oil you would start to worry Fixed it for you. No need to thank. Quote Link to comment Share on other sites More sharing options...
clutch-monkey Posted 23January, 2015 Report Share Posted 23January, 2015 Fixed it for you. No need to thank. my friend on his datsun: "i knew it had run out of gearbox oil because it had stopped leaking" Quote Link to comment Share on other sites More sharing options...
matara Posted 23January, 2015 Report Share Posted 23January, 2015 Mine smoked a little bit when I had it! Quote Link to comment Share on other sites More sharing options...
Peter M Posted 23January, 2015 Report Share Posted 23January, 2015 John Willhoit - Porsche restorer for the well off - discovered Porsche themselves were using a similar valve on their '62 race cars and found a modern day use. He talks about it from 7:15 onwards:https://www.youtube.com/watch?v=-qyluq2j27g#t=434For 911's it just seems to be a function of how worn the oil pump, ie end and side clearances between the gears and the pump housing, how long the engine is left standing and cold oil viscosity. Quote Link to comment Share on other sites More sharing options...
Nevdog69 Posted 27April, 2019 Report Share Posted 27April, 2019 I put one on and it starved the engine of oil. It was put on correctly, but the pump would not open it by suction. I think this is a very dangerous modification. As your pump gets older it allows oil to seep into the crankcase causing smoke on startup. When your pump is worn to this level that a check valve is needed to stop smoke, it is also at risk of not being able to suck the valve open. I would warn anyone off it. Peter M 1 Quote Link to comment Share on other sites More sharing options...
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