200 degrees at start up

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Leviathon
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200 degrees at start up

Post by Leviathon »

closed cooled - on start up, heats up to about 200, then drops to normal. Works fine from then on. 3 years on rebuild - SBC, just started this year.
Steve and Mary Levi
1973 32' Marinette Fisherman
SBC Crusaders
El Ohssa
St. Joseph, Michigan
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GB49
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Location: Catawba Island, OH.

Re: 200 degrees at start up

Post by GB49 »

Check tstat?
1986 Sedan 32'. Twin Chrysler 360in^3, 275hp.
Forum member since 1998.
jralbert
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Re: 200 degrees at start up

Post by jralbert »

this won't be helpful. But I recall having that same issue (Chrysler 318's, 240hp)and can't recall what the solution was. Tstat replacement as suggested, seems cheapest, easiest way to begin.
-joel-
former owner 1988 '32 FB Sedan
Chesapeake Bay
twin 318 / 240 hp
Potomac MD
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Busia
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Re: 200 degrees at start up

Post by Busia »

I have had the same problem. The T-stat is sticking. If you want to change it, get one that fits a 350 but don't look in the T-stat housing. My Crusaders have the T-stat on top of the heat exchanger in the hose.
BUSIA
located in Ketchikan, Alaska. Gods country
32 foot Marinette (no fly bridge)
twin 350 Crusader (Chev 350) engines
1:1 Borg Warner velvet drive transmissions
Closed cooling (antifreeze in the engine)
Proud to be retired IBEW and an A+P
Fastjeff
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Location: Rock Halll, MD

Re: 200 degrees at start up

Post by Fastjeff »

And be sure the new 'stat goes in the right way: the 'puck' (with the wax filling that opens the valve when it gets hot) goes towards the incoming coolant.

Jeff
"We live at the bottom of an ocean of air, not at the top." General Marvage Slatington
Bud719
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Location: Riva, MD

Re: 200 degrees at start up

Post by Bud719 »

I had this yesterday. Both engines more or less new this year, new Tstat (140). Both with new manifold s and risers. All pressure s and temperature s have been excellent on both my 1989 360 ‘s.
I just had a short haul and scraped the marine life off the bottom and intakes. So I took it out yesterday to keep the critters off. Ran great but both engines were at 200 F. Not much change when I idled or sped up. Raw water flow seemed good .

It is hot out her in MD , yesterday was only about 86, but high today is 91.

Weird— both engines!
Bud
Bud
1990 Marinette 32 Sedan “Mostly Harmless”
Twin Chrysler 360s RWC
Westerbeke 6.5 KW
Beard’s Creek, South River,
Chesapeake Bay, Maryland
Fastjeff
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Re: 200 degrees at start up

Post by Fastjeff »

Before you do anything else, buy/ borrow/ steal an infrared temp gun and see what's actually happening.

Jeff
"We live at the bottom of an ocean of air, not at the top." General Marvage Slatington
Leviathon
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Re: 200 degrees at start up

Post by Leviathon »

thanks all - will try those things
Steve and Mary Levi
1973 32' Marinette Fisherman
SBC Crusaders
El Ohssa
St. Joseph, Michigan
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