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  #1   IP: 45.49.35.172
Old 06-09-2021, 09:28 PM
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Heat increasing, oil pressure decreasing

Recently went from raw water cooling to fresh water cooling, but the heating issue was there before the change. Not sure about the oil pressure bc in the 2.5 years of ownership, I never paid attention to it until now (ignorance is bliss).

Overheating:
Goes from less than 100 to over 180 in 15min (at idle). I’ve acid washed and dismantled and visually inspected the whole cooling system twice and see no blockages. I did remove the thermostat before each flush. Original gauges, newer senders. I have a new in box Faria gauge that I will test with the sender. I will also adjust the valve to the thermostat a quarter turn and see what happens and then a full half turn to see what happens. And I’ll report back. I also ordered a Groco 3/4” thru hull and coated it with Barnicle Barrier by Petit that I will be installing in place of the original 1/2” thru hull which I assume is calcified. Note: The fresh water cooling system does have a steel wool filter prior to the return to the hx.

Oil pressure:
Never have I ever adjusted the oil pressure valve so I’ll be doing that and reporting back.

Any other ideas, comments, suggestions are invited and appreciated

Here are pics of initial start up and 15 thereafter
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  #2   IP: 165.225.20.156
Old 06-10-2021, 03:11 AM
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not sure I would call 180 as overheating.

See the poll, and the comments. Several owners are running at 180 especially with fresh water cooling. A4 will be happy @ 180
https://www.moyermarineforum.com/for...ead.php?t=3323

Would also depends if you sail in Maine, or in Florida
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  #3   IP: 40.140.239.18
Old 06-10-2021, 08:00 PM
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I'd remove the thermostat and see what happens.
Steel wool filter? First I've heard of such a thing. Is this a commercial item? I'd appreciate more info on it before giving judgment.
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Old 06-11-2021, 09:01 AM
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Quote:
Note: The fresh water cooling system does have a steel wool filter prior to the return to the hx.

I assume this means it is in the coolant side, not the raw water side. If so, I would remove it. There is no need for a filter in the coolant loop, and it will provide some additional obstruction. My experience with Moyer's FWC conversion kit is that it runs at 180 because it is reaching steady-state with the maximum cooling that the HX can handle. The thermostat is open all the time and is not really doing much about regulating. Any additional obstruction in the
cooling quickly results in higher temps at cruise RPM.
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  #5   IP: 104.174.83.118
Old 06-11-2021, 01:42 PM
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Guys, remember that the gauge temperature is with the engine at idle, out of gear (no load whatsoever) and in 61° water.
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Old 06-11-2021, 07:51 PM
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180 is normal. mine takes a considerable amount of time to get up to temp. mine would never lift the needle off the peg unless i run at load for awhile. i am PNW puget sound though 54 degree water. the oil pressure on yours looks low to me though
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