2004 SEAT Alhambra excessive blow by?

2004 SEAT ALHAMBRA
197,000 MILES • 1.9L • 4 CYL • TURBO • FWD • MANUAL
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AWIC79
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Noticed a fair amount of exhaust fumes coming from the oil cap(when open) but
only when the engine is warm, nothing when cold. It def looks and smells like exhaust fumes not steam.
Other than this the car starts and drives fine, no smoke from exhaust.
How serious is this?
Jul 1, 2015 at 2:25 AM
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WRENCHTECH
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That's pretty much normal. The PCV system is there to burn that off.
Jul 1, 2015 at 4:41 AM
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AWIC79
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Thank you, that's put my mind at ease a little.
Though am I right in thinking that exhaust fumes don't belong there, and must be escaping past the piston rings ? Whilst it might not be as serious as I thought, it's not good ?
Jul 1, 2015 at 10:50 AM
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WRENCHTECH
  • ✓ASE Certified Mechanic
  • 20,761 POSTS
  • ASE Certified Mechanic
Yes, but all cars have it to some degree.
Jul 1, 2015 at 2:04 PM
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