My radiator expansion tank is leaking....any ideas on how to fix.

speed_ga · 01-06-2009, 08:27 PM

Ok my radiator expansion tank is leaking. I need a temporary fix until i am able to get a new one shipped to me. The expansion tank is plastic and has a hole near the bottom. Any suggestions? I was thinking there might be something like bondo out there for something like this.

My car is a Subaru SUS legacy 2.5 sedan.

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speed_ga · 01-06-2009, 08:31 PM

not sure if radiator expansion tank is the right word. but it's this one http://cgi.ebay.com/ebaymotors/1994-...Q5fAccessories

madmax718 · 01-07-2009, 09:28 AM

Ahh, easy fix. take the tank out, give it a good scrub and wash- let dry.

Use some 80 grit sand paper around the hole to rough up the surface. Use a epoxy stick, and fill hole. if its a small hole, you can actually skip this whole sentence, and just use a blob of RTV, and let cure. The tank is under no pressure, other than the weight of the coolant on top.

01-06-2009, 08:27 PM	#1
speed_ga Scooby Newbie Member#: 188906 Join Date: Sep 2008 Chapter/Region: South East Vehicle: 1999 Legacy SUS lmt. Black Cherry	My radiator expansion tank is leaking....any ideas on how to fix. Ok my radiator expansion tank is leaking. I need a temporary fix until i am able to get a new one shipped to me. The expansion tank is plastic and has a hole near the bottom. Any suggestions? I was thinking there might be something like bondo out there for something like this. My car is a Subaru SUS legacy 2.5 sedan. * Registered users of the site do not see these ads.

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01-06-2009, 08:31 PM	#2
speed_ga Scooby Newbie Member#: 188906 Join Date: Sep 2008 Chapter/Region: South East Vehicle: 1999 Legacy SUS lmt. Black Cherry	not sure if radiator expansion tank is the right word. but it's this one http://cgi.ebay.com/ebaymotors/1994-...Q5fAccessories

01-07-2009, 09:28 AM	#3
madmax718 Scooby Specialist Member#: 172501 Join Date: Feb 2008	Ahh, easy fix. take the tank out, give it a good scrub and wash- let dry. Use some 80 grit sand paper around the hole to rough up the surface. Use a epoxy stick, and fill hole. if its a small hole, you can actually skip this whole sentence, and just use a blob of RTV, and let cure. The tank is under no pressure, other than the weight of the coolant on top.