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replace piston rings  Rate Topic 
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 Posted: 06-13-2011 02:01 pm
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Dan (Florida)
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Was wondering before I start the teardown if the piston rings can be replaced without pulling the engine . With the head off the liners can be removed?? and the rings replaced from the top.  It seems like it could be done but would like to hear a success story first. Cyls 1,2,&4 are fine but the #3 smokes and fouls the plug.

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 Posted: 06-13-2011 06:48 pm
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Jensen Healey
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Why do you suspect the rings? It's most likely the valves.

I've never torn down an engine that was still in the car. If you can get the sump off it may be possible.

Last edited on 06-13-2011 07:37 pm by Jensen Healey

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 Posted: 06-13-2011 09:57 pm
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subwoofer
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You will still have to completely dismantle the engine, doing it while still in the car is possibly doable, but I really don't see the point of the exercise. The liners are glued in, I've only tried getting them out once, but they do not come out easily like VW or Citroen liners do (O-ring seal).

Pulling the engine is not really that hard, you should be able to get it out all by yourself in an afternoon if you have a decent engine hoist, and doing so will save you a lot of work and aggravation. IMHO, any work involving opening the engine should be done with the engine in a proper engine stand.

--
Joachim

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 Posted: 06-13-2011 11:51 pm
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Dan (Florida)
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I've had the engine out of this car twice since last november, once for the rear main seal and the second time for another rear main seal and new main bearings and pulled the head completely apart and inspected/cleaned all of the valves. Everything looked good but the #3 cyl still fouls plugs.  I don't really see how much oil could get into an intake valve guide area with the cam follower bucket surrounding the valve top and the relatively upright position and good oil drainage. I am convinced that the rings are bad. I am not looking forward to pulling the exhaust and steering off just to get the head off, but it is probably better than pulling the engine clear out again and pulling it down again just to pull one piston for a ring change. 

maybe the third time will be a charm

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 Posted: 06-14-2011 01:03 pm
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Brett Gibson JH5 20497
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Dan, if you have low compression squirt some oil into that cylinder then check agian, if the pressure comes up sure enough bad rings, if it stays the same bad valves.

Brett

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