vonny288mcob

Looking for some help. I have a 2003 496 Mag with closed water cooling. Just got it out of storage and the Coolant Reservoir is empty and all the coolant is in the bilge. I just filled itback up with coolant and put 17psi of pressure on it for 1/2 hour and no leaks or drop in pressure. Everything seems good. Any ideas where I should check? Thanks, Vonny

brian41

iTrader: (1)

The grommets/seals that the heat exchanger slides down into is a common leak area that tend to leak more when its cold.

Sydwayz

iTrader: (1)

Welcome to the site.
Probably grommet 14 in this picture.

http://www.boats.net/parts/search/Me...TEM/parts.html

Feel free to use the OSO search function. There are at least 12 threads on this very topic; like this one:

http://www.offshoreonly.com/forums/g...ant-bilge.html


Also, if you are still running the original antifreeze, you do not know it's age, or if it is starting to turn dark/metallic in color vs. pink; it's time to flush and replace. It's only good for 6-7 seasons/years tops; less with high use.

vonny288mcob

Thanks Brian and Sydwayz. I can tell that it was leaking around the grommet. I will get replaced before next storage time. This site is great because of members like yourselves! Thanks Again!

Sydwayz

iTrader: (1)

You will want to replace it now before the season. If it's leaking while sitting, it's DEFINITELY going to leak under pressure while running.

BUP

iTrader: (9)

Agree with both above exactly and they need to be replaced as Brian T said. Its somewhat a common problem with this app.