I've just found some heat exchangers in the garage I forgot I had, as I thought I threw them away with the exhaust as it was rusty. Well they look in good condition but is there any way of telling without fitting them to the running engine? Cheers Scott
The main peril is that the inner exhaust pipes have rusted through, which is unlikely given the gauge of metal. Stick your hand over one end of the pipe and blow hard down the other end. You'll end up with a lovely soot moustache, but if there's no air escaping, they're likely fine. Check whether the ends than connect to the exhaust have corrosion "rings" around them - they tend to rot where the horseshoe clamps are - which might make them difficult to seal. Finally, look down the big hole where the air pipes connect. If the inside is full of big fins that almost fill up the space, they're originals and well worth fitting The only way to get heat in your van.
Ok so these are the ones I have, when I look down the big end all I can see is the bit that connects to the exhaust. I'm not going to blow down them until I've cleaned them up. But I can see a small light gap so will probably need a little bit of weld. So how do you tell originals from repro's is there a part number on them?
