Hi all,
It’s taken a while to finally get the right gauges and senders for our diesel generator (most places wouldn’t help for numerous reasons) and I fired it up. Well it ran for two minutes then quit and the engine compartment was full of exhaust. I aired it out and got the fire/CO detector quieted then started to investigate. There was a scattering of carbon leading back to the Hx/mixer elbow.
I got busy draining the antifreeze coolant and PB blaster on the flange bolts. After some effort I got the elbow off, it looked fine. The flange on the Hx however had eroded just beside the flange gasket. This Hx was new 2014 but shows the same erosion of metal that had happened to the previous one. Only exhaust gases run through this section with water injected further along in the elbow. What would cause this type of erosion and how can I fix it?
Here’s the picture. The arrow points behind the paper gasket where the metal is thin.
It’s taken a while to finally get the right gauges and senders for our diesel generator (most places wouldn’t help for numerous reasons) and I fired it up. Well it ran for two minutes then quit and the engine compartment was full of exhaust. I aired it out and got the fire/CO detector quieted then started to investigate. There was a scattering of carbon leading back to the Hx/mixer elbow.
I got busy draining the antifreeze coolant and PB blaster on the flange bolts. After some effort I got the elbow off, it looked fine. The flange on the Hx however had eroded just beside the flange gasket. This Hx was new 2014 but shows the same erosion of metal that had happened to the previous one. Only exhaust gases run through this section with water injected further along in the elbow. What would cause this type of erosion and how can I fix it?
Here’s the picture. The arrow points behind the paper gasket where the metal is thin.
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