Bore Glazing -Diesels

Avocet

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Re: old smokey

I always thought that bore glazing happened because at very light throttle openings, most engines (especially diesels) run very weak so the combustion chamber temperatures are high and the oil on the cylinder walls gets "fired" on like the glaze on a pot. What I can't understand is why the engine as a whole doesn't run hot. I'm guessing its because it's cooling system is designed to cope with full throttle full load conditions where much more work is being done so more heat is being generated but under these conditions I was lead to belive the combustion chamber walls were colder because the incomming mixture was much richer in fuel and had a bigger cooling effect.

Can anyone shed more light on this? Certainly, lightly run engines seem to suffer more than thrashed units.
 

DepSol

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Re: old smokey

As I said before I dont have the full details but I do know Soltron enables the fuel to burn more easily at lower oxygen rates. It also enables a cleaner burn.

Dom

I am boating again ;-)
 
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Re: old smokey

I have been involved in the Petrochemical industry for some years .... covering Quality and Quantity of Petroleums ... as well as additives from CFPP - Bugs - Drag reducers - Residue fluidisation etc. etc.

Soltron ..... has never hit my list, but then I was shipping 19000 litres a time !!
 
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Re: old smokey

But isn't Soltron a retail Bug treatment ??
 
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Re: old smokey

Hexene or anything such as should do that !!

But note that Red Diesel is 'mid-grade' gas-oil and has a residual component count higher than City Diesel etc. It is NOT as some say poor quality - just a middle distilate grade.

Burning quality of it will never approach that of Ultra Low Sulphur / City Diesels whatever you do. But then again I would never run a Marine Diesel like ours on such higher grades.... many know about not using high-speed lub-oils ... similar is with diesels.

The City Diesels / ULS grades have to have Lubricity factors increased by additives to ensure proper bore lubrication .... low speed marines wouldn't stand a chance !
 

DepSol

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Re: old smokey

Are you still in the Petrochemical industry if you are then you will hear of Soltron.

Dom

I am boating again ;-)
 

DepSol

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Re: old smokey

No not just a bug treatment! Enzyme which does to Asphaltines and Sulphur and other nasties in your tank as it does to the bug, breaks it down and gets rid of it. Increases Cetane and ensures a clean burn by ensuring the fuel burns earlier longer and much better. Have the evidence on independant tests if you are interested.

Dom

I am boating again ;-)
 
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Petrochemical industry ...

I own / partner Quality and Quantity Co's in the Baltics involved in all apsects of Petochems. I own 2 labs dedicated to all manner ogf analysis .... so you could say I am somewhat involved ....

Soltron is a name that we only hear in the 'retail' area - it is not commercial over here, as we have 'in-house' and trade chems. available that retail never hear about.

To put it into perspective .... we are regularly Q&Q'ing shipments of 30,000 - 70,000 Metric Tons of petro-chems .... not litres !
 
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Additives ...

There are NO additives that increase Cetane more than 1-2 points - I have been involved in this field as distributor / applicator / tester for many moons and can verify this without fear.

I accept that Soltron is recognised as a Retail additive designed more for the small quantity user rather than the Oil Trade that I am involved in ... millions of tons of products.
 

DepSol

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Re: Additives ...

Actually it is not really 'Retail' but has been made available that way by certain people. Soltron is mainly used by large companies and powerstations. If you would like some to test I will see what I can do to get it to you. You may be impressed.

As I said before a major world leader in fuel has now taken it on and is atomising it into their fuel before delivery. Not press released yet but will be announced in the future.

Never say that there is NO additive that can improve cetane more than 1-2 points unless you have already tested the product in question. Somebody once said the earth was flat and someone else said that man would never land on the moon but times change.

You may be very experienced in your field and may have been doing it for many moons but new technology is always around us and enzyme technology is very complicated. Dont take this as an insult it is not intended that way its just that we have seen so many people say the same thing and then hange their minds after trying it.

Dom

I am boating again ;-)
 

vyv_cox

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Re: Errr.. Vyv is a \"him\"! (nm)

Well, thanks for the correction! I can confirm that I am male and have a beard to prove it. Well, is that proof? Perhaps in our hormone-rich modern society this means nothing. My wife assured me that when she had our children, I was the father. You'll just have to take my word for it.

Bore glazing is a phenomenon that affects different engines in different ways and the oil industry uses one particular engine that is badly prone to it for research and testing. It does affect all engines to some extent, though. It is caused by wear of the cylinder liner to the extent that all original honing marks are removed and the lubricant cannot get between it and the piston rings. The early stages are crucial and once you've got it you can only re-hone to remove it. Running at low load is very conducive to glazing but I can only guess that the reason is because full oil-control ring lubrication is not achieved in this condition.

A major contributor is using an oil grade that is "too good" for the engine. Modern diesel lubricants with an API of CG, CH and ever upwards have a high base number to combat the acids that are produced at high running temperatures in turbo-charged truck engines. Using these in a low output, normally aspirated yacht engine will never achieve the neutral pH that is intended and the basic chemistry at the ring/liner interface will increase wear rates considerably. So for most yacht engines an API CD or even CC is correct.
 
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Re: Errr.. Vyv is a \"him\"! (nm)

Which engine is it..............?
 

vyv_cox

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Re: Errr.. Vyv is a \"him\"! (nm)

To be honest, I don't remember. It's a big, 6-cylinder Ford truck engine but I cannot recall the type. Very unlikely to be used in a boat.

Industry uses known problem engines for specific research and these engines tend to be old designs, built when little consideration seemed to be given to some features. For example, one I do recall is the old Triumph Dolomite engine, used for its renowned ability to run big-end bearings. Another is the original Ford Kent engine. Used for cam and tappet problems, as many owners will recall these items failing in the first year of operation and producing a cam-less camshaft. There are many others.
 
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