Should i worry about this?

[ammo]

This ring was siezed in the piston. I soaked it for days and with some heat i took it out in pieces. When i first started i damaged the ditch a bit as you can see. I lut the piece back so you can get a sense how the ring would sit with the damage. I smooth the damage the stuck out so its not going to rub but should i just get a new used piston?e

Ps

Its the middle ring. Also how do i remove the top first ring? Its almost flush and the gap is extremely tight.

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[Its me]

Whenever rings are replaced, they should be checked for what is known as piston ring end gap as well is piston ring groove gap. These have to be precise and if they are out of tolerance you will have issues… A Factory Service manual (or ALLDATA online) has this info… A Haynes or Chilton manual should have them as well..

I explain this a bit and showed some pics in a thread I wrote about rebuilding my RAV4 engine. I.E. how to check and the proper gap location when installing in the block…

http://www.ericthecarguy.com/kunena/10-Repair-Central-The-How-To-Forum/52546-toyotakarl-s-rav4-adventure-with-engine-rebuild

P.S. to remove the top ring you may end up breaking it (no big deal)… A small pocket screwdriver may help…

Moving to the pistons… nice and clean… at least on the outside.. Time to check ring end gap…

Pushing the ring down with a piston to keep the ring square in the cylinder..

Measuring… All within specs…

Rings are marked… Numbers side up!

Measuring piston ring groove gap… within spec..

Marking ring gap locations on top of the piston

My work area… and talk show chairs from the 70’s

Tools for the job…

Piston oil return holes were clogged… A small drill bit makes short work of this…

Residue from that oil return hole…

Cleaned pistons installed..

[Bill]

For the cost of a new piston I wouldn’t take a chance using the old one. It’s too much work to do the job over again.

[Author]

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