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Old 03-14-2018, 12:55 AM
slatanik slatanik is offline
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Join Date: Jan 2018
Location: Auckland,New Zealand
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Coolant expansion tank vent bolt

A couple of weeks ago the notorious vent plug started leaking coolant.
My mechanic spotted the leak from the middle of the bolt.
He plugged it with a screw for plastic trims.
Today warning in the dash saying "check coolant level"
Popped the hood and for my frustration discovered that the top of the vent plug is completely missing and is coolant everywhere...
I was close to home.
Got home,no rise on the temp gauge.
Managed to get the chunk out from the vent hole.
I am a kinda hoarder when is about odd size and thread bolts and nuts.
I got lucky! Found a 10 mm 0.75 pitch bolt with a large,flat head in my collection.
Used a brand new o ring on it and made a channel with my dremel on the threaded part exactly the same as the original.
Installed the bolt,which is is the proper length and the thread ends about 2 mm before the head of the bolt accomodating the o ring perfectly.
Hoorray it works!
Topped up the coolant vented the system.
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