[C320-list] Heat exchanger core and mixing elbow

[Irving Grunes]

I think that its extremely important to run the engine hard under laod for
several hours from time to time to burn out the carbon in the mixing elbow.
Those boats with very low hours are probably the most susceptible to mixing
elbow failure.
Irv Grunes
2001 #851
Isle of Wight


On Sun, Oct 6, 2013 at 9:00 PM, <dprudden at comcast.net> wrote:

> I have a friend who has the same engine as me (and a lot of you), a
> 3gm30f. He works for a very reputable (and expensive) boat yard in
> Massachusetts. He says, and his yard agrees, that the mixing elbow should
> be replaced every 5 years and the heat exchanger core should be pulled and
> sent out to be properly descaled/cleaned every 5 years as preventative
> maintenance. I know there was a recent discussion about cleaning out the
> mixing elbow, and this is obviously more than that. Agree or disagree?????
> I sail in salt water. Does the number of hours used each year matter?
>
> Thanks for the help and advice!
>
> David Prudden
> #787
>