Bore Glazing

[chippie]

I dont want to further degenerate the debate but I want to know.
What is a definition of bore glazing?
I know of bore polishing which (I think) is just the result of rings comfortably bedding in.
Is bore glazing the deposition of an external substance on the bores? if so , what is it?
I wondered whether it was a generic term for stuck rings as the result of excessive idling.

Please enlighten me.

 

[barebones]

I would also like to know what bore glazing is.

 

[mtb]

so would I

<A target="_blank" HREF=http://homepage.ntlworld.com/boats/>http://homepage.ntlworld.com/boats/</A>

 

[oldsaltoz]

G'day chippie,

you might like to look at

<A target="_blank" HREF=http://www.engineproblem.com.au/anho_2.htm>http://www.engineproblem.com.au/anho_2.htm</A>

it should provide you with the answers
Hope this helps

Avagoodchrissie'n'newyear Old Salt Oz /forums/images/icons/cool.gif

 

[charles_reed]

Good link cobber

 

[chippie]

Thanks for that Old Salt, Merry Christmas.

 

[Guest]

Bore glazing occures when the wax in diesel burns and coats the inside of the cylinder. The rings on the pistons can take up some of the lesser diameter of the bore but the usual outcome is a slowing down of the engine for a given amount of fuel with higher temperatures and more wear on bearings (big & little ends) with a possibility of broken rings. There are fuel additives to counteract this problem but in extreme cases the bores should be honed by a specialist or re-bored.

 

[stubate]

really
s

 

[stubate]

www.engineproblem.com.au,

leave oil filter loose until oil gets thru? what planet are these guys living on?
i often wondered what the long term effect of walking around upside down was !!

 

[Johnjo]

Is it not to bleed any air out of the system, prior to starting
up a new engine, surely they cannot mean to run with a loose filter.

 

[stubate]

its a a so called prob caused by letting your engine tick over (if you believe the crusties)
but i have only ever addressed the situation when fitting new rings or pistons to a used bore or cylinder and i have "busted the glaze" ie lightly honed the bore with some emery or a dedicated tool, this removes some of the finish on the bore and allows the new rings and piston to rub against fresh metal to "run themselves in"
stu

 

[andyball]

tend to agree with you : have seen many examples of bore -glazing on 2 & 4 stroke m/cycle engines.....v.few of which were left ticking over or indeed ever used lightly at all.

 

[Bergman]

Its the effect on ones eyes when people start talking about tribology of interfaces and breakdown of detergent layers in varnished cylinders.

 

[lauradee]

ta
i really think that bore glazing ( if there is such an animal) is a natural result of the wearing process and is something that is dealt with when the engine is rebuilt. and in fact if we werent all skinflints or could afford to rebore or recylinder (we havent talked about liners yet in the forum) it would not be an issue.
if we want to talk about premature wear caused by running the engine at a too low a temperature then we can open the debate again.
s

 

[chippie]

That comment to leave the filter loose seemed a strange one to me ,but on looking at their site they have had plenty of experience. I think it was a bit like taking the filler cap off the old motorbikes to make sure the oil is pumping.They did say to make sure the engine cant start.
Did you take their test? I surprised myself at how well I did.

 

[charles_reed]

Andy,
Sure you weren't seeing the effect of Castrol R.

The burnt castor oil used to stick to everything, especially the valves on JAP 500 engines.
We used to have to strip and "glaze-bust" every 3rd race.

Ah! but the smell...

 

[ccscott49]

Formula junior? Or?

 

[lauradee]

thumble thumbs

yeah but they are a bit old fashioned, it was like going back to practical motorist in the 60s.
can you imagine the ford production line or whoever, when the moment of triumph comes as the car gets to the end of the line and the key is turned to start her up and drive her awy to the despatch compound, horny handeded george with his greasy cap tilted to one side, hang on a minute fred, give her a bit more !! thats it, oil here, hang on a mo while i tighten the filter, ok let her go!!! taraaaah
i donrt think so and it shouldnt be any different in the real world of marine engines. if you put her together proper, prime the pump as you are assembling as well as liberally oiling everything (as advised etc) and putting a bit of oil in the filter, no probs.
s

 

[charles_reed]

Started as Formula III and then became Formula 500.

We used to race a JAP-engined Keift, which was quite competitive until people started fitting double-knocker Norton engines - after that it degenerated into a pocket-book competition.

I then moved on to Formula 750, raced against a very dodgy chap called Chapman.

 

[ccscott49]

Yes, of course I remember now, especially the OHC nortons, they make new norton engines now, for MC racing did you know that? Along with BSA goldstar engines in Holland.