Trouble changing thermostat

Equiles11

Cadet
Joined
Apr 4, 2017
Messages
7
I took off the housing and found only pieces of my thermostat left in the housing. Where would the rest of the pieces (spring) have if the rusted out? Could it have mades its way out of the system or is it somewhere I should be looking?

Also, does anyone know the part number of the thermostat that would replace the broken one? I think the part number 3856961 is correct but no one has it locally and I don't want to order the wrong one online.

​The number on the housing is 3857801

1999 4.3 Volvo Penta I/o

Thank you so much!
 

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Last edited:

Scott Danforth

Grumpy Vintage Moderator still playing with boats
Staff member
Joined
Jul 23, 2011
Messages
47,543
start by following the coolant passages. the spring would not have made it out
 
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