SMOKING

MAZDA 929
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POMY
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  • 1 POST
HI MY GIRLFRIEND HAS A 1983 MAZDA 929 4CYL.2L
THE NO1 CYL PLUG KEEPS OILING UP AND BLOWING GREY SMOKE.(RINGS?) SO I PUT A COMPRESSION TESTER ON IT AND GOT A 200PSI READING ON IT. THERE IS NO EXESSIVE CRANKCASE PRESSURE.IS IT POSSIBLE TO HAVE RINGS THAT WORN,TO LET OIL THROUGH ,AND STILL HAVE 200 PSI?.A MECHANIC CHANGED THE VALVE GUIDES SEALS, (HEAD STILL ON) DIDNT MAKE ANY DIFFERENCE,MABY WORSE.
ANY IDEAS? CHEERS.
Nov 24, 2006 at 2:30 PM
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MWHITNEY
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  • 63 POSTS
is the oil puddling up on top of plug or in cylinder?
Dec 21, 2006 at 5:32 AM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
[quote:56398670f2="POMY"]HI MY GIRLFRIEND HAS A 1983 MAZDA 929 4CYL.2L
THE NO1 CYL PLUG KEEPS OILING UP AND BLOWING GREY SMOKE.(RINGS?) SO I PUT A COMPRESSION TESTER ON IT AND GOT A 200PSI READING ON IT. THERE IS NO EXESSIVE CRANKCASE PRESSURE.IS IT POSSIBLE TO HAVE RINGS THAT WORN,TO LET OIL THROUGH ,AND STILL HAVE 200 PSI?.A MECHANIC CHANGED THE VALVE GUIDES SEALS, (HEAD STILL ON) DIDNT MAKE ANY DIFFERENCE,MABY WORSE.
ANY IDEAS? CHEERS.[/quote:56398670f2]

Oil passing thru rings excessively-will carbon-up the combustion chamber and will create your high pressure
Dec 22, 2006 at 7:29 AM
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