Leaking By Thermostat Or Hose - Yamaha Raptor Forum
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post #1 of 8 (permalink) Old 05-15-2019, 07:03 PM Thread Starter
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Leaking By Thermostat Or Hose

I been noticing a little drip or just water keep appearing on what I think is the thermostat. And was wondering if this was a fix I can do myself? I have all plastics off and was looking at it. I have pics but don’t know how to post them
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post #2 of 8 (permalink) Old 05-15-2019, 08:18 PM
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Originally Posted by Glockative View Post
I been noticing a little drip or just water keep appearing on what I think is the thermostat. And was wondering if this was a fix I can do myself? I have all plastics off and was looking at it. I have pics but don’t know how to post them
I think you need a few more posts before youre allowed to attach images. Could you just be having a leak from a loose hose clamp?

Replacing upper radiator hose is very simple, just messy.
Make sure to bleed air out of system through the bolt with crush washer on the thermostat housing.

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post #3 of 8 (permalink) Old 05-15-2019, 10:24 PM Thread Starter
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How do I check the best way of everything that I need to change? I’m new to this so was gonna change the hose clamps thermostat housing, thermostat, and the plastic cover. Was gonna do everything. So I might not need everything? Best way to tell is how? And what do you mean by bleed it. Is that after I’m done working on it and put more fluid?
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post #4 of 8 (permalink) Old 05-15-2019, 10:25 PM Thread Starter
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I posted the pics you need to just click attachments. Please help lol I’m new
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post #5 of 8 (permalink) Old 05-16-2019, 06:15 AM
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Hello,firstly download service manual from stickys in maintainence section.This will help with checking/removing/replacing partsalso download parts catalogue so you can get correct parts

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post #6 of 8 (permalink) Old 05-16-2019, 07:03 AM Thread Starter
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I have it I bought the manual. Do you have any suggestions on what my problem can be?
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post #7 of 8 (permalink) Old 05-16-2019, 09:19 AM
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From your pictures......maybe coolant pipe has perished abit,these 660's are getting old(like me).Original rubbers don't last forever,hopefully a couple of the long termers will be on at some point and maybe have better idea

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post #8 of 8 (permalink) Old Today, 10:35 AM
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Its common for the plastic housing on the thermostat to get hot and slightly warp over time.You can either buy a new housing or people have had good luck putting sandpaper on a perfectly flat surface and sand slightly until flat again.
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