[Georges]

I see wetness in this area. Should I simply remove, clean and use some kind of sealant or just replace?

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[Greimann]

That could be one of three things:



The o-ring under the housing is shot and needs to be replaced.

The housing is cracked.

The bolts on the housing are loose

The hose clamp is loose.



OK that is 4 things.



The no cost option is to take it apart, inspect and clean everything and re-assemble the housing and o-ring with a skim coat of Hylomar® sealant on all surfaces.

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[George]

One other possible cause of the leak would be a bad(cut or cracked) hose.

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[flash]

we're going to start seeing a lot of this kind of thing - all rubber hoses and seals should have been changed by now - we're on borrowed time at this point - the manufacturers of these parts only warranty for 5 years and recommend changing by no more than 8 years MAX- we've already started to see an increasing rate of hydraulic failures - it's reasonable to expect to see cooling system failures too

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[Duckman]

By the way, that isn't the thermostat housing but it does have an O-ring inside that started leaking on my car. I replaced it myself for a couple of bucks and that did the trick.

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