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Registered
Join Date: Mar 2009
Location: Edmonton, AB
Posts: 767
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Heat Exchanger flange difficulties
I'm trying to install my '71E MFI heat exchangers on my newly rebuilt engine. Its upside down on an engine stand. I can see that the first cylinder flange I install the nuts on is not pulling all the way down as I can still get a feeler gauge in. A flat edge across the heat exchanger flange mating faces tells me that these flanges are no where near parallel. Some of the ears on the flanges seem bent too. Is this all par for the course? Any suggestions as I'm sure its not going to seal the way it is now. I think I can heat and straighten the the flanges but getting the mating faces aligned may be difficult.
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__________________________ '18 Macan S - my turbo Porsche previous Pcars '58 356A coupe, '00 Boxster S;'95 993 Polar Silver/Chestnut;'08 Cayman S;'70 911E |
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11-29-2015, 01:16 PM
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Registered
Join Date: Oct 2008
Location: Nash County, NC.
Posts: 8,520
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Different scenarios at different application.
The 3 pipes are individual inside the heat box until the connection pipe so they will pull tight. Work all three so they all pull down together. I have seen double gaskets used to close leaking exhaust. Bruce |
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11-29-2015, 02:19 PM
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Registered
Join Date: Jan 2011
Location: Gulf Coast FL
Posts: 1,486
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I had the same issue with the stock HE flanges. I used a big mill file to surface all the flanges back to flat. Took around 1/2 hour to file flat the 3 flanges for each HE.
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11-29-2015, 02:37 PM
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Registered
Join Date: Mar 2009
Location: Edmonton, AB
Posts: 767
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Thanks guys. I've taken a file to them but they need more work. The ears could use straightening too. I wasn't sure if they would pull down properly but it sounds like they should.
__________________
__________________________ '18 Macan S - my turbo Porsche previous Pcars '58 356A coupe, '00 Boxster S;'95 993 Polar Silver/Chestnut;'08 Cayman S;'70 911E |
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11-29-2015, 03:59 PM
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Registered
Join Date: Mar 2009
Location: Edmonton, AB
Posts: 767
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Got 'em bolted up. They should be good.
__________________
__________________________ '18 Macan S - my turbo Porsche previous Pcars '58 356A coupe, '00 Boxster S;'95 993 Polar Silver/Chestnut;'08 Cayman S;'70 911E |
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12-04-2015, 01:06 PM
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