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2023 / 04 / 19

PISTON RING INSTALLATION

Rings installed in the wrong grooves or the wrong side up can lead to excessive oil consumption and blow-by and possible scuffing of the cylinders.
These problems can cause engine failure.
Please follow below steps:

 
  • Three Piece Oil Ring
First, place the spacer in the groove. Then spiral the first rail into the groove below the spacer followed by the remaining rail into the groove above the spacer.
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  • One and Two Piece Oil Rings
Using a proper ring installation tool, open the oil ring just enough to allow the ring to go over the top diameter of the piston. Work the opened ring down from the top of the piston to the oil groove. Place the ring squarely into the piston groove, taking care to keep it flat. Release the tension of the ring installer tool. Finish the installation.

When using a two piece oil, install the Coil spring in the groove then follow the above instructions.

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  • Compression Rings
The ring be installed in the proper groove.

Rings installed in the wrong groove or wrong side up can lead to excessive oil pumping, excessive blow-by, and in some cases completely dry up the bore, causing ring and cylinder scuffing as well as accelerated wear. Any of these problems, of course, constitute a failure as far as an engine overhaul or rebuild is concerned.

Lay the rings out in groups of tops ring and 2nd rings on the bench. Check for TOP marks (DOT or lasor marks).

With the oil control rings loaded on the piston, using a  proper  ring installation tool,  open the second rings with the top mark up, just enough to allow the ring to go over the top diameter of the piston. Work the opened ring down from the top of the piston to the second groove, place the ring squarely into the piston groove taking care to keep it flat, release the tension of the ring installer tool.

Repeat this same process with the Top rings.

First ring
 
  • Final Steps
Once the piston rings are on the piston, stagger the end gaps. It is important that the ring end gaps are not lined up.  This prevents oil flow past the rings.











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