Coolant system ID ..HELP

[iloveboatingny]

Hi Again,<br /><br />Well, it seems that the part store guy and myself have 2 different ideas about what coolant system I have.<br /><br />He said its a raw water cooled manifold & riser system and I thought it was FRESH WATER COOLED.<br /><br />How do I tell for sure?<br />My info I have is:<br /><br />1977 318 Chrysler<br /><br />1.It uses ANTI_FREEZE.<br />2.The hose from outside (intake salt water) goes into the heat Exchanger<br />3.The manifolds & risers that were suppied by him were Salt water cooled manifolds & risers. <br /><br />So my question is....Which thermostat do I buy?<br /><br />A fresh water cooled or salt?<br /><br />My temperture range is around 180. This would be normal for a FRESH WATER COOLED but way high is its RAW WATER COOLED.<br /><br />Thanks,<br />Lou

 

[Bondo]

Re: Coolant system ID ..HELP

I have No Idea what your engine/boat looks like, But if I were replacing all of the system.....<br />I'd plumb it so the manifolds are Freshwater cooled,+ the Risers(Only) were Seawater cooled....<br /><br />Then I'd use the 180* T-stat.....<br /> The way you're plumbing it,at 180* the manifolds will Rot out Quicker...