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No compression in cylinder six

Tiny
WESTRUCK
  • MEMBER
  • 1992 MERCURY MARQUIS
  • 4.6L
  • V8
  • AUTOMATIC
  • 160,000 MILES
Clean intake plum from carbon deposits. Is possible for carbon to break off while cleaning and wedge the intake valve and exhaust? There is no compression cylinder six.
Thursday, October 10th, 2019 AT 3:23 PM

1 Reply

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good evening,

Yes, it is very possible. A piece could be preventing the valve from closing.

I would remove the valve cover and look and see if one of the valves is partially open. If it is, push the valve down and see if the carbon drops into the cylinder.

Roy
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Thursday, October 10th, 2019 AT 3:36 PM

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