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5-Series (E12,E28, E34, E39, E60) Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)

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Old 02-07-2005, 06:51 PM   #1 (permalink)
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I have a 1985 528 rebuilt motor from the bottom up. the thing runs great ,but I have a problem with the exhaust Y pipe overheating below the O2 sensor.The thing turns cherry red. used
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Old 02-07-2005, 09:38 PM   #2 (permalink)
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I dont know what u mean by y-pipe but depending on where youre describing you may have either a plugged catalytic converter or a fuel mixture problem...or even both.

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Old 02-08-2005, 06:54 PM   #3 (permalink)
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Originally posted by whyme@Feb 7 2005, 06:51 PM
I have a 1985 528 rebuilt motor from the bottom up. the thing runs great ,but I have a problem with the exhaust Y pipe overheating below the O2 sensor.The thing turns cherry red. used
[snapback]287578[/snapback]
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Old 02-08-2005, 07:10 PM   #4 (permalink)
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Originally posted by whyme+Feb 8 2005, 06:54 PM--><div class='quotetop'>QUOTE(whyme @ Feb 8 2005, 06:54 PM)</div><div class='quotemain'><!--QuoteBegin-whyme@Feb 7 2005, 06:51 PM
I have a 1985 528 rebuilt motor from the bottom up. the thing runs great ,but I have a problem with the exhaust Y pipe overheating below the O2 sensor.The thing turns cherry red. used
[snapback]287578[/snapback]
[snapback]288148[/snapback]
[/b][/quote]
I am referring to the point at which the two pipes from each individual manifold intersect to create one exhaust pipe creating what appears to be a Y.Thanks for the input and you are on the money,the problem was in the fuel mixture.running great now thanks again.
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Old 02-09-2005, 01:05 AM   #5 (permalink)
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Quote:
Originally posted by whyme+Feb 8 2005, 05:10 PM--><div class='quotetop'>QUOTE(whyme @ Feb 8 2005, 05:10 PM)</div><div class='quotemain'>
Quote:
Originally posted by whyme@Feb 8 2005, 06:54 PM
<!--QuoteBegin-whyme
Quote:
@Feb 7 2005, 06:51 PM
I have a 1985 528 rebuilt motor from the bottom up. the thing runs great ,but I have a problem with the exhaust Y pipe overheating below the O2 sensor.The thing turns cherry red. used
[snapback]287578[/snapback]

[snapback]288148[/snapback]
I am referring to the point at which the two pipes from each individual manifold intersect to create one exhaust pipe creating what appears to be a Y.Thanks for the input and you are on the money,the problem was in the fuel mixture.running great now thanks again.
[snapback]288162[/snapback]
[/b][/quote]


Glad to hear its fixed, congrats.

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Old 02-09-2005, 08:11 AM   #6 (permalink)
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I replace the cluth on a v8 mustang and by accident disconected the vacum hose to the map sensor causing the engine to run a very rich mixture and created the same problem you have.check all you fuel syatem conection.
sorry about the spelling..........My main language is french.
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Old 02-09-2005, 08:49 AM   #7 (permalink)
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Quote:
Originally posted by GILLES@Feb 9 2005, 09:11 AM
ghead
I replace the cluth on a v8 mustang and by accident disconected the vacum hose to the map sensor causing the engine to run a very rich mixture and created the same problem you have.check all you fuel syatem conection.
sorry about the spelling..........My main language is french.
[snapback]288425[/snapback]
Non taken we do appreciate your input........
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