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#1
09-22-2007, 11:45 PM
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Diesel cooling system
Do our diesel cooling systems REALLY need an expansion tank?
would things operate just fine with a radiator with a cap? I have a chance to get a really cheap custom aluminum radiator and losing the expansion tank would really clean things up in my engine compartment...
__________________
RIP: 80 300SD RIP: 79 450SEL 2002 E430 4matic (212,000km) 2002 ML500 'sport'  ____________________________ FACEBOOK: PANZER450 
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#2
09-23-2007, 12:02 AM
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No, they don't need the expansion tank as long as the radiator cap and water level is high enough.
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#3
09-23-2007, 12:12 AM
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Any ideas why there is an expansion tank?
__________________
DJ 84 300D Turbodiesel 190K with 4 speed manual sold in 03/2012 
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#4
09-23-2007, 12:17 AM
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More water capacity, no liquid loss out the cap when pressure is vented.
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#5
09-23-2007, 12:21 AM
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Makes sense.
__________________
DJ 84 300D Turbodiesel 190K with 4 speed manual sold in 03/2012
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#6
09-23-2007, 01:08 AM
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So then if I got an aluminum rad of the same dimensions with a cap top center that should be alright?
__________________
RIP: 80 300SD RIP: 79 450SEL 2002 E430 4matic (212,000km) 2002 ML500 'sport' ____________________________ FACEBOOK: PANZER450
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#7
09-23-2007, 01:16 AM
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I don't see how it could hurt. I know one member is running his 617a 4-speed conversion with the stock 240D radiator.
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