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Lots of exhaust blue smoke

Tiny
M. DEE
  • MEMBER
  • 1986 FORD RANGER
  • 2.3L
  • 4 CYL
  • 2WD
  • MANUAL
  • 185,000 MILES
Power seems okay blue smoke (always) cold, hot idle, and run down the street (lots off almost like a sea foam treatment). Spark plugs has carbon cylinder 4 spark plug pretty dirty (black)
compression good psi: cyl 1=210, cyl 2=205, cyl 3=185 after adding oil to spark plug hole =205 psi, cylinder 4 205 --(compression tester gauge might be a little off maybe to high.) New PCV valve, new ignition module.
1. Could this me a bad/plugged crankcase ventilation system, oil separator?
2. Piston rings.
3. Valve seal or worn valve guides.
Help please
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Tuesday, October 15th, 2019 AT 10:39 PM

1 Reply

Tiny
SCGRANTURISMO
  • MECHANIC
  • 4,897 POSTS
Hello,

Yes. Yes. And yes. Blue smoke coming from your exhaust is a definite sign of oil being burnt in your combustion chamber. I don't think it is going to be from your vehicle's oil rings, valves, or a head gasket leaking though, that is a good compression test. I would start with the PCV valve. Anyway here is a link that you might find helpful below:

https://www.2carpros.com/articles/blue-smoke-from-engines-exhaust

Please go through this guide and get back to us with what you are able to find out.

Thanks,
Alex
2CarPros
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Wednesday, October 16th, 2019 AT 4:36 AM

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