Coolant Expansion Tank Repair

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DavidOliver
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Re: Coolant Expansion Tank Repair

Post by DavidOliver »

Just a thought.
If you can clean the inside of rust a bit, you can use a resin coating inside to form a continuous bag.
After all, the water leak comes from the inside so plugging from the inside is better.

Dave the cog.

Pete Boole
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Re: Coolant Expansion Tank Repair

Post by Pete Boole »

+1 for JB Weld - buy the one that's not quick setting - it's the strongest. Use it to bond on a patch as Bash suggested rather than just blobbing it on. It's absolutely essential that both parts are grease-free and keyed. Maybe use a big Jubilee clip to keep it in place while it sets.

Pete

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Re: Coolant Expansion Tank Repair

Post by richardw »

I would consider moving to Evans Waterless Coolant to reduce stress on cooling system components. As the boiling point is 180 degrees, there is little or no pressure in the system, meaning that fewer leaks will develop and when they do they will tend to be gradual rather than catastrophic. As a side benefit, it is non-corrosive and will be kinder to the water pump than standard coolant. It is expensive and you have to flush the system first with a special flush, but worth it I think. I’ve had it in my car for several years.

Cheers, Richard
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Marten
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Re: Coolant Expansion Tank Repair

Post by Marten »

Pete Boole wrote:
Sun Aug 28, 2022 10:24
+1 for JB Weld - buy the one that's not quick setting - it's the strongest.
I'd go for (quick setting) Fe Weld ;), it looks fairly easy*) to replicate if you can reuse the spouts.

*) metal fabricating workshop required

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