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Low compression cylinder 4

Tiny
ANDRE06
  • MEMBER
  • 1993 MINI COOPER
  • 1.6L
  • 4 CYL
  • MANUAL
  • 150,000 MILES
Hi heres the problem I have 1, 2, 3 cylinders 10.5 bar the fourth cynder 4.5, abolutely no oil consumption but when I put a little oil in the 4th cylinder the compression rises to 10 +, The car runs normally above 1200 revs but if I let it tick over for a few secondsit runs on 3. No smoke, oil consumption, lots of smoke if I pour a little oil into the 4th cylinder untiil the oil is burnt. Any ideas or advice well appreciated.
Andre
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Monday, August 12th, 2019 AT 4:58 AM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,380 POSTS
Hello Andre,

Can we double check the year of the car? 1993? It sounds like you have broken piston rings which is common, for this we must take apart the engine or get a rebuilt or used unit. Let me know what you want to do so I can send instructions.
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Tuesday, August 13th, 2019 AT 10:24 AM

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