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Replace 1970 expansion tank?
Posted: Sun Jul 10, 2022 6:57 pm
by RobFrost
My under-nearside-wing expansion tank is split. Maybe I'm just cynical but I don't imagine this is doing much - there's air space in the tank and another vessel under the dash. What's the accepted wisdom on these - replace or just connect the two hoses together?
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Re: Replace 1970 expansion tank?
Posted: Mon Jul 11, 2022 9:45 am
by 70sThrowback
I know when my hose had cracked (didn't know at the time), when I brimmed the tank i got petrol leaking out by the front wheel. So it definitely does something, not sure if maybe you can put a release valve in?
Re: Replace 1970 expansion tank?
Posted: Mon Jul 11, 2022 9:46 am
by deano
Its not under any kind of stress, so I think you could clean it up and hot glue the split. I think the wisdom is, fit one if you smell petrol fumes in the garage. Not 100% sure, but I think the system should include a charcoal canister to work as intended...
Re: Replace 1970 expansion tank?
Posted: Mon Jul 11, 2022 12:32 pm
by impmad2000
I did just join the pipes together, not thinking about the routing and got a similar fuel leak problem when filling the tank. I have since added a high point in the link pipe, higher than the fill neck and now no problem. I did get rid of the seemingly empty box.
Re: Replace 1970 expansion tank?
Posted: Tue Jul 12, 2022 5:13 am
by RobFrost
Ok thanks. Maybe I fix or replace the box then. Another job to do...
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