Piston-Piston Rings-Connecting Rods Installation and Assembly

The piston, piston rings, oil rings, and connecting rods are parts that should be installed and connected to each other before it will be inserted into the block.

In installing or assembling these parts be sure to wet it with oil. The purpose is that on the first crank of the engine the engine oil is not yet distributed to the engine parts.  At least before the oil reaches all the moving parts there is lubrication provided so it will not immediately get hot.

Here are the parts

Piston-Piston Rings-Connecting Rods Installation and Assembly-Toyota L PistonThe piston


Piston-Piston Rings-Connecting Rods Installation and Assembly-Toyota L Piston RingsThe piston rings and oil ring


Piston-Piston Rings-Connecting Rods Installation and Assembly-Toyota L Piston PinsThe piston pins


Piston-Piston Rings-Connecting Rods Installation and Assembly-Toyota L Connecting RodThe connecting rod


Tools to use in assembling the parts

There is only two that you needed.  It is the snap ring pliers that you use in placing the rings and the piston ring installer pliers.

Piston-Piston Rings-Connecting Rods Installation and Assembly-Snap Ring Plies

Piston-Piston Rings-Connecting Rods Installation and Assembly-Piston Ring Installer Pliers




Watch the video on how all the parts are placed.


It is such important to be careful enough in placing all the parts.  Remember the piston has marks and that is according to arrangements when inserted in the cylinders.  Observe the dots on the images below.


Piston 1 with no mark


Piston 2 with one dot


Piston 3 with two dots


Piston 4 with 3 dots


Not only the piston has marks, but the connecting rod also has.  If you are keen on observing the marks such as dots you will never be mistaken to pair the right piston with the right connecting rod. And of course, you will not also be mistaken in the insertion of right pistons on the right cylinders of the block.

Cylinder 1 must be the nearest in the front of the engine.  It is the nearest to the camshaft timing gear and cylinder 4 must be the nearest to the transmission.


With that hints to bear in mind, you won’t waste time disassembling the engine when you come to your senses that you have not been conscious enough to observe marks provided by the manufacturers as the guide in assembling after doing an overhaul.

If you have followed the guide you will save time and possibly save resources to be incurred through errors.

You can find additional helpful information on this website page.

Thank you again and I hope I have helped you in some way.  If you have any question, comments, and observations please feel free to leave it in the comment box and I’ll be willing to get back and answer you as soon as I read your message.



  1. Thanks for the guide. I love the simplicity at which you write and your willingness to help. Perhaps I wouldn’t have paid so much in fixing my car if I had being equipping myself with information/knowledge like this. Once in a while, one should check the piston and some other part of the car, to avoid future problems. Awesome write up.

    • Thanks, faftop for dropping a comment. There is only one way to check these parts and that is to have your engine opened. This work only comes when there is really a need to do so. 

      These simple steps can be done during an engine overhaul because it’s necessary to have it done to address issues on the engine.

  2. This is an interesting read. I didn’t know that you had to wet the pistons and rings with oil prior to installing them into the engine block – I mean it might sound second nature or common sense but it goes to show you sometimes you do need a professional to do this type of work. Specially if you have never done this before, thank you for sharing.

    • Thanks, Paul. You were struck by a common idea and yes, simple things sometimes can be put aside as important. I never thought that way before since I’ve been observing most of the technicians do it until I asked myself, why do I have to do that?

      If we buy replacement parts some are already drenched with lubrication but there are those that are not and pistons and piston rings are not usually for that. A newly oversized cylinder is a bit rough and it should be wet with oil so with the piston rings and piston pins.

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