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Thermostat housing problems

 
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  • 1 Post By bob2006
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  #1 (permalink)  
Old 11 Jan 2019, 10:18 pm
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Default Thermostat housing problems

Let me give you a little timeline.


Got the car running November 2017, noticed a small coolant leak from the thermostat housing. 1-3 drops a night, left it for the time being as I spent a lot of money getting the project running.


Feb 2018, got a new thermostat gasket, and while I was in there I replaced the thermostat too
Dropped a bolt, lost it, in a pinch got a bolt from homedepot, was a shitty grade and I snapped the bolt

few days later I tapped it out and put a new Doorman thermostat housing.



Few months ago I noticed a few drips of coolant would drip from the rad hose, it had an aftermarket hose clamp (that sucks, not fit for the car)

my plan was let it leak out until the resovoir was empty then replace the hose, I got a new hose and thermostat housing together from a junk yard, low km car.


I did an oil change on my car at work because it was slow and the guys were looking for something to do, there was a ton of coolant on the oil pan and splash guard, I popped the hood and the thermostat housing is leaking a ton, is it possible the housing went bad after just a few months or did I possible damage the block outlet from extracing the broken bolt? It just seems weird a brand new housing is bad again....

will be replacing this weekend, anything I should do so this isn't happening a lot?

Not sure what napa warranty is for Dorman products, I only have had to return one part (Bad napa wheelbearing) and they gave me my money back and asked no questions
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Old 17 Jan 2019, 10:31 pm
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Default Re: Thermostat housing problems

Quote:
Originally Posted by ajhockey3 View Post
did I possible damage the block outlet from extracing the broken bolt?
Doubtful...
To the best of my knowledge the bolt does not intersect "fluid".
So even if the extraction was a bit rough it is highly unlikely that you created a pathway from the thermostat housing through the block.
If you are getting coolant in your oil it may be the head gasket.
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Old 18 Jan 2019, 01:07 am
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Default Re: Thermostat housing problems

well are you checking your torque level for these t-stat housing bolts ? I believe they are metric 8mm, that's going to be in-lb level . next, you need to determine why theres water in the oil. thats a different issue here
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Old 18 Jan 2019, 07:21 am
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Default Re: Thermostat housing problems

You might look at the radiator to see if it's spewing at the seam of the tank end. May only do it after getting hot.
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Old 18 Jan 2019, 08:53 am
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Default Re: Thermostat housing problems

Guys he said he had coolant ON the oil pan, not in it, so not an issue.

When you replaced the plastic thermostat housing, did you clean and ensure the block outlet was flat? If you have crusted oxidation or old coolant or burrs from your drilling and tapping, the thermostat housing will not get a proper seal. You may have to flatten it. As well, the aluminum corrodes so it may have been pitted on either the thermostat surface, or, if you removed it from the block, on the block side as well as the head. If there is pitting on the block side or on the head, as there was with mine, I cleaned it up and smeared silicone there and then put a new gasket and have had no troubles.

Anyway, I would go to the junkyard and get another "block outlet" and get rid of the not so nice "fixed" one and go from there.
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Old 18 Jan 2019, 01:32 pm
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Default Re: Thermostat housing problems

Quote:
Originally Posted by myckee View Post
Guys he said he had coolant ON the oil pan, not in it,
Thanks for pointing that out.
Makes a world of difference.
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Old 18 Jan 2019, 11:23 pm
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Default Re: Thermostat housing problems

Once I had coolant on the oil pan and it would come out of the air bleeder on the coolant thermostat mount after it warmed up.
I had tried to loosen it once and it seemed it might break off so I didn't get it snug enough upon re-tightening
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Old Yesterday, 10:54 am
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Default Re: Thermostat housing problems

I feel like kind of an idiot, I replaced the t housing again, and it still leaked, but from the overflow hose, added a hose clamp and no leaks.
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Old Yesterday, 05:38 pm
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Default Re: Thermostat housing problems

We live and learn, AJ. Nice job of figuring it out, anyway.
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Old Yesterday, 05:47 pm
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Default Re: Thermostat housing problems

Quote:
Originally Posted by chuzz View Post
We live and learn, AJ. Nice job of figuring it out, anyway.
got a new housing under warranty, thermostat gasket was $1.9, got the coolant from work for free.

could be worse
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