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pete27car8vno
Newbie


Joined: 22 Feb 2016
Posts: 1



PostPosted: Mon Feb 22, 2016 4:15 pm    Post subject: Thick smoke Reply with quote

I started up my 1990 964 after a 12 month layup with very serious smoke everywhere! I assume it's something to do with the 'air oil separator'. My question , where is it located, is it a DIY repair, can it do serious damage, is there a mod' to stop this happening again as it seems to be a serious design fault? I don't think it's burn off as the engine was run for approx ten minutes with smoke getting worse. I've heard of AOS failure where oil is sucked into the inlet manifold!

Last edited by pete27car8vno on Mon Feb 22, 2016 5:23 pm; edited 1 time in total
 
  
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Zingari
Donnington
Donnington


Joined: 25 Oct 2009
Posts: 12413
Location: Cheshire

1993 Porsche 964 Anniversary

PostPosted: Mon Feb 22, 2016 4:59 pm    Post subject: Reply with quote

How do you know it's not just burning off the oil that may have seeped past the piston rings into the cylinders given its been stood such a long time?

Any sign of it clearing after you've run it for a few minutes?
_________________
Alfa Romeo’s 4C is everything a Italian sports-car should be: it’s gorgeous to the point of pornography, distinctive enough that nobody will ever mistake it for a Porsche, handles like it’s on rails and steers like a kart.
 
  
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ras62
Montreal


Joined: 20 Jan 2012
Posts: 603
Location: Cheshire


PostPosted: Mon Feb 22, 2016 4:59 pm    Post subject: Reply with quote

Dont be using those water cooler terms around here!!

Seriously though, air cooled motors don't have separator. What you have seen is quite normal after a long layup. Oil finds its way past the rings and into the combustion chamber causing a smokey engine on starting. It should disappear after a few minutes.
 
  
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Zingari
Donnington
Donnington


Joined: 25 Oct 2009
Posts: 12413
Location: Cheshire

1993 Porsche 964 Anniversary

PostPosted: Mon Feb 22, 2016 5:00 pm    Post subject: Reply with quote

^^^ Great minds Grin Thumb
_________________
Alfa Romeo’s 4C is everything a Italian sports-car should be: it’s gorgeous to the point of pornography, distinctive enough that nobody will ever mistake it for a Porsche, handles like it’s on rails and steers like a kart.
 
  
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