hey
just joined this forum, have a 1973 45 tf now since feb 1992, had your message has interest to me, i think it is time for heat exchanger work for me, at wot temp continues to climb, & it never did this...
I also find in summer (long island sound) i have to drain out the 50/50 out & put pure water as best i can, and nalcool. It runs about 10degrees cooler.
anyway i have been putting this off for 4-5 years and it is time..as summer goes on & makes the water temp of sound increase, i can see engine water temp approach 190-195
know the detroits do not like to run hot
did you have a nightmare pulling the exchangers? did bolts break? have heard horror stories. Of course salt water here!
this boat also has exhaust temp gauges and i notice port runs hotter, (the port is also the engine that runs hotter by 5-10 deg)i have as you probably do too, large gate valves w/ square nut that act as bypass for sea water, as i can see they limit the amount of sea cooling water (i think) to the exhaust elbows & muffller systems. this adjustment i dont think has an effect on engine cooling, but just exhaust temp. in other words, increasing the flow would only decrease the bypass quantity of water & lower the muffler/exhaust temp but not the engine temp.
any comments
by the way, nice boat you have, it is what we wish our outside looks like
|