Yanmar 4JHE mixing elbow gasket

[rico]

Time to change my leaking mixing elbow (someone call it raiser..).

Original spares arrived but much to my surprise the gasket is now made by two foils of different metals : one magnetic (iron ?) welded in one spot to a non-magnetic one.
I made my idea, but to be sure, anyone knows if the non-magnetic side, marked by the letter "T", should go towards the heat exchanger (aluminum alloy), or the raiser (inox) ?

Thank you for your help

Rico

 

[lpdsn]

The manual tells me there are two types of mixing elbow. L Type (stainless steel) and U Type (bronze). I presume you have the right gasket for your type.

 

[rico]

Thank you lpdsn, you presume right , I have the correct gasket !
But I still miss to know which is the right position I should set it in !

 

[RichardS]

Thank you lpdsn, you presume right , I have the correct gasket !
But I still miss to know which is the right position I should set it in !

I don't know that engine but am sure that the steel/iron/inox side should be pressed against the inox riser and the alloy side against the alloy H/E.

Richard

 

[rico]

thank you Richard, unfortunately the gasket has one side inox and one side iron, with raiser inox and heat exchanger aluminum alloy

 

[RichardS]

thank you Richard, unfortunately the gasket has one side inox and one side iron, with raiser inox and heat exchanger aluminum alloy

Ah, I see. That obviously makes it less clear cut.

Assuming that the gasket can be fitted both ways without any transfer holes being blocked, then I would think that the two inox sides go together, although I doubt whether it's going to make any difference in practice.

Richard

 

[VicS]

thank you Richard, unfortunately the gasket has one side inox and one side iron, with raiser inox and heat exchanger aluminum alloy

I'd avoid putting the Inox side in contact with the aluminiun heat exchanger.

There wont be such a severe interaction between the iron and the aluminium as there might be between the Inox and aluminium.

BTW it is the ( bronze) inverted U type of mixing elbow that would be called a "riser" .

 

[rico]

Thanks all,
I agree, inox to inox and iron to aluminum.
I cannot but blame Yanmar though, for having changed this gasket from a normal one to this bi-metallic without a note !