broken / disintegrated thermostat

gatorgitter

Cadet
Joined
Mar 31, 2008
Messages
19
Howdy, Guys...
I have a new ( to me) used boat ; a '03 21' bowrider, w/a VP 5.0GXi-b ( multi port fuel injection ) , raw water cooled , oushing an SX outdrive. 50hours on it, stored on a lift on the Fl Intracostal , before I brought it to Orlando ; the boat Seems very clean. Seems like it running fine, but it's running cold, the temp gauge will hardly budge. I figure the thermostat was stuck open, so I get the parts, and set out to replace it this afternoon. Hoses and wires came off OK , and after lightly popping the housing w/a rubber mallet , it broke free ; it had never been removed before.

When I tilted the thermostat housing off, I noticed that the spring and One of the spring's retaining 'straps' was just 'sitting' there , not attached to anything. It appears as thougth the 2 spring retaining straps rusted/broke free , and 'let the spring go' ( from the thermostat body) . The problem is that there should be 2 of these 'straps' , but I only have one. I assume the other dropped into the manifold. I felt around a little, but couldn't feel anything expect a big lip/ridge .

I'm sure y'all see the questions coming... Where did the missing 'strap' go? How far into the manifold , or did it drop into the block? Will it get stuck anywhere in particular ? Any ideas on how to find / remove it?
Will it hurt anything to run it w/the 'strap' probabaly clanking around the manifold or block ? I've run it about 10/15 hrs already, and it seems to be running fine.

I plan on taking my IR temp gun to the engine, but it's real crowded, and I'm not sure I'll be able to get accurate readings all over , to check for hot spots.

Any advise would be greatly appreciated. To be honest, I'm kinda worried about it...
Thanks for the help ,
gator.
 

Don S

Honorary Moderator Emeritus
Joined
Aug 31, 2004
Messages
62,321
Re: broken / disintegrated thermostat

That little piece of metal isn't going to cause a problem unless it gets stuck in the new thermostat or the circulation pump. Chances are, you will never see it again. Probably stuck in the narrow passages of the block.
 

gatorgitter

Cadet
Joined
Mar 31, 2008
Messages
19
Re: broken / disintegrated thermostat

Hey, Don...

Looks like you were right again :) (not that I ever doubted you) I ran it fairly hard this weekend w/no problems. The temp guage looks good and I took an ir temp gun to it, and everything I could get to looked normal/balanced.

Thanks !
gator
 
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