Coolant additive in diesel generaters?

[Tom Warner]

Gary one small point. Its not the heat in a diesel engine that is causing
the cavitation erosion of the cylinder liners, its the vibration (diesel
knock)and this problem can exist at any temperature. The important thing is
that you are doing all of the right things for your Cat diesel and
generator. Here is a good article that explains in more detail what you
have already suggested. http://www.bandgmachine.com/technical/august95.htm

One more thing. If you have antifreeze in your engine now but are not sure
what kind it is(and dont rely on the color), then do not add any coolant to
it. Drain it all out and put new coolant in and recored the kind and date
for later reference. Mixing coolants can cause some real potential problems.

Tom
1982 FC35
Vernon Center,NY
In the beautiful Mohawk Valley

At 02:31 PM 5/1/2005 +0000, you wrote:
>Hi Jim,
>
>The way I understand it, all water/antifreeze is corrosive at
>operating temps in a deisel engine. Maintaining the proper pH is
>essential to long life of the coolant system and engine components.
>Additionally, around the extreme heat area at the top of the cylinder
>walls, unconditioned coolant can boil and cause pinholes in the
>cylinder wall. This damage will show up as glycol in the oil
>samples, and should obviously be repaired ASAP before a costly
>roadside breakdown occurs.
>
>I use Caterpillar pH test strips and dip them in the coolant, then
>match the color to the color chart on the bottle to determine how
>much SCA (Supplemental Coolant Additive) to use. Long life
>antifreeze has the SCA pre-mixed but I understand that all antifreeze
>is subject to breakdown and needs to be checked regularly and added
>to. Too much SCA is bad also.
>
>In my '83, I also have a PowerTech deisel with the Kubota engine. I
>have found PowerTech to be helpful, but they know little about the
>engine. I would call a Kubota dealer with your question. I've been
>told in the past by Kubota that whatever I do with the CAT engine
>(fluid types and additives) will be fine for the Kubota, which seems
>like just a blanket statement. I'd be interested in what you find
>out. My thought was that the Kubota isn't working very hard as a
>generator to cause extreme heat situations. Don't know, but I keep
>the antifreeze fresh since there's relatively little in there
>compared to the CAT, which would be costly to replenish regularly.
>
>Regarding gasoline engines, I don't think they reach the extreme heat
>levels in the cylinder walls as a diesel, but these days, maybe they
>do. I would think a name-brand type antifreeze would be pre-mixed
>with additives to handle the realm of a gasoline engine, but
>everything breaks down with age, couldn't hurt to add to or refresh
>the fluids.
>
>Gary Miller
>83 FC 33
>Wauwatosa, WI
>
>--- In WanderlodgeForum@yahoogroups.com, "scoggins_jim"
><scoggins.j@a...> wrote:
> > Diesel engines require a coolant additive in the anti-freeze. I had
>a
> > Detroit 8V92 and now this Cummins 8.9. In both cases, and in my Ford
> > F350 Diesel, the instructions are clear about using an additive. My
> > previous coach had a Yanmar powered Kohler for the generator and
>this
> > coach has the Power Tech diesel generator.
> >
> > I have never seen a cautionary note about being sure the generator
> > engines had the coolant additive. For the heck of it I put it in the
> > Yanmar cause I thought it made sense to do so. Further, I have a
>small
> > Kubota farm tractor with a relatively small engine (23 HP) and it's
> > manual had no reference to using an additive. I put it in cause I
> > thought it made sense to do so.
> >
> > I think I understand the necessity behind using an additive so I
>think
> > the compression ratios of the diesel generators and the small farm
> > tractor would dictate their use.
> >
> > Taking it one step further, although a gas engine does not have the
> > higher compression ratios that would dictate additive usage it seems
> > they would benefit nevertheless with a neutral PH in the coolant
>system.
> >
> > Accordingly, what is the group wisdom on:
> > Q1. Should one put the coolant additive in the coolant for the
>diesel
> > generators.
> > Q2. Would their be some benefit to putting it in the coolant system
>of
> > a gas engine.
> >
> > Yeah, I know, I'll call Powertech tomorrow but I wanted to know the
> > groupthink before I talked to them.
>
>
>
>
>
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