..as a final thought.. though there are now "permanent" coolants
available for new vehicles, our old cast iron engines still require
glycol based coolant. As a rule of thumb for exchange/life duration...
stick your finger in the coolant, if it still feels slippery then it's
likely still OK for a while longer.. best guess/test from me..
On 11/5/2015 9:05 AM, Richard Collins wrote:
> I don't disagree re boat engines which have more highly complex cooling
> systems as both the fresh and salt water systems require attendance far more
> frequently than cars. The freshwater side is less problematic than the
> saltwater side but there is no "best by" date to refresh or clean the myriad
> of pipes, tubes, pumps, filters or liquids found on boats/yachts/ships
> cooling systems. The age of the fresh water cooling liquid is basically a non
> issue, just like with cars.
> Having said that I did 2 yacht deliveries recently, one a twin engine Cat
> powered sport fisherman and the other a 55 foot sailboat powered by a single
> Perkins (both diesel). Both had cooling issues, not coolant related. As with
> our cars (and my Healey) it's the hardware causing the problem, not the
> liquid.
> No argument with you, just my experience...
>
>
> Regards,
> Richard C
>
>
>> On Nov 5, 2015, at 09:41, David Porter <frogeye@porterscustom.com> wrote:
>>
>> Richard,
>> not to sound argumentative, but the seawater systems/heat exchangers or
>> what ever name are vastly different systems, but the engines are still
>> subject to the same conditions as our cars and preventative maintenance
>> should be a higher priority in off shore capable boats. Those boats using
>> fresh water systems are highly prone to coolant system issues too. Mostly
>> due to different temps across the heads, but also lack of pump
>> lubrication... IMHO
>> dp
>>
>>> On 11/5/2015 8:05 AM, Richard Collins wrote:
>>> I am running the same
>>> 50/50 mix in my BN7 but am using distilled water in lieu of tap water. It
>>> hasn't been drained in a number of years except to fix a leak in the
>>> original still used radiator several years ago.
>>> FYI my water cooled Porsches have coolant more than 5 years old and no
>>> issue. I have captained large motor yachts and the multi gallonage coolant
>>> in their engines are seldom drained.
>>> So age is not the issue IMO
>>>
>>>
>>> Regards,
>>> Richard Of Ky
>>> BN7 #440
>>>
>
--
Dave Porter Porter Custom Bicycles 2909 Arno St. NE Albuquerque, NM
87107 505-352-1378 Go HERE: my world www.porterbikes.com/
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