disappearing coolant

[sanphoto29]

I have a 1988 freshwater cooled Chrysler 360 inboard. Antifreeze is disappearing mysteriously at a rapid rate. It must be going out through the exhaust as there is nothing in the bilge or oil. I have replaced the heat exchanger, risers and riser block off gaskets. Any ideas on where it could be going and how?

 

[fastjeff]

You can buy a dye for the coolant that shows up with ultraviolet light. Might be the only to find it.

Jeff

PS: Are you sure those riser gaskets aren't leaking through?

 

[JJDebeers]

I have a 1988 freshwater cooled Chrysler 360 inboard. Antifreeze is disappearing mysteriously at a rapid rate. It must be going out through the exhaust as there is nothing in the bilge or oil. I have replaced the heat exchanger, risers and riser block off gaskets. Any ideas on where it could be going and how?

Is the coolant in the block and heat exchanger being displaced by raw water? If so then maybe your plumbing is wrong. Is this a new closed cooling system?

Thanks,
JJ