Re: Re: bore glazing

Posted by DDG on November 05, 1998 at 19:25:47:

In Reply to: Re: bore glazing posted by Paul Fox on November 05, 1998 at 08:52:13:

: : I am looking for pratical information as to what causes bore glazing and how to deal with bore glazing if it occurs in your tractors engine.
: : Can any one help me ?

: It is my understanding that "bore glazing" is the natural result of the rings sliding up and down and "polishing" the bore over time. The usual way to deal with it is by using a "glaze breaker" which is a type of hone. I believe it uses a fine whetstone type of device, and the less expensive types can be chucked in a hand drill. There is a centrifugal/spring device that pushes the stone against the sides of the bore as it spins, and you run it up and down the cylinder a few times to rough it up. This assumes that the cylinder is in good shape, within tolerances for diameter and roundness, and that glazing is your only problem. Most likely, if you're going to tear a motor down far enough to do this, you'd go ahead and put a fresh set of rings in. Others may have more details or correct me as to the cause.
the D-8 Caterpillar owners book mentions the use of "break in powder" to break the glaze, "use 1 1/4 teaspoonfuls of powder per cyl. & run at 800 rpm for 30 min antd it is then ready for service" call Cat and ask for pn # 7F5225 break-in-powder. to use loosen the air cleaner to allow a gap between the flange & intake manifold and allow the powder to be sucked into the intake. Saw my dad use this method to cure oil comsumpsion on a GMC v-6 gas engine 30 yrs ago,once, can,t remember if it worked or not, I think he used scouring powder

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