Cooling Issues

DMCJordaan · 05-10-2008, 10:07 PM

Hey everyone I'm having some cooling issues with my 83 240D. during the day city driving is no problem it was about 90 degrees today....driving with the A/C....chillin in a starbucks drive-thru and the temp needle went up just a tad. But when I drive on the freeway it almost gets to the top mark...

You think it would be the other way around with so much air hitting it at 75mph but no it heats up, I'm thinking maybe it needs new coolant because the past owner did NOTHING to this car but drive it. So it probably hasn't been changed for years I can say. Anyone have a suggestions? Thanks!

thebenzbar · 05-11-2008, 03:21 AM

Might be time to change coolant (MB spec) so do a flush too... while you're at it, a thermostat replacement is a good preventive maintenance, and obviously check the condition of water pump and radiator (check entire rad for damaged fins, rad's plastic neck prone to cracking, and check hoses for leaks & replace if there is swelling, etc...), OR it could just be a bad temp gauge/sensor.

DMCJordaan · 05-11-2008, 11:34 AM

Ok cool, you know it just might be the temp guage... I forgot to mention that it did jump around a bit when it heats up. Like if I hit bumps it goes down then up again. Just weird that it only does it on the freeway

Oh well off to check the cooling system

05-10-2008, 10:07 PM	#1
DMCJordaan Almost a Member! Join Date: Jun 2007 Location: Palm Springs, California, USA... But hopefully San Antonio, Texas in the near future. Posts: 45	Cooling Issues Hey everyone I'm having some cooling issues with my 83 240D. during the day city driving is no problem it was about 90 degrees today....driving with the A/C....chillin in a starbucks drive-thru and the temp needle went up just a tad. But when I drive on the freeway it almost gets to the top mark... You think it would be the other way around with so much air hitting it at 75mph but no it heats up, I'm thinking maybe it needs new coolant because the past owner did NOTHING to this car but drive it. So it probably hasn't been changed for years I can say. Anyone have a suggestions? Thanks! __________________ From now on, it's Diesel or NOTHING!!!!..except of course a 71 Cuda and a 81 Delorean ;)

05-11-2008, 03:21 AM	#2
thebenzbar Senior Member Join Date: Apr 2008 Location: So.Flo. Posts: 451	Might be time to change coolant (MB spec) so do a flush too... while you're at it, a thermostat replacement is a good preventive maintenance, and obviously check the condition of water pump and radiator (check entire rad for damaged fins, rad's plastic neck prone to cracking, and check hoses for leaks & replace if there is swelling, etc...), OR it could just be a bad temp gauge/sensor. __________________ My Mercedes-Benz Homepage

05-11-2008, 11:34 AM	#3
DMCJordaan Almost a Member! Join Date: Jun 2007 Location: Palm Springs, California, USA... But hopefully San Antonio, Texas in the near future. Posts: 45	Ok cool, you know it just might be the temp guage... I forgot to mention that it did jump around a bit when it heats up. Like if I hit bumps it goes down then up again. Just weird that it only does it on the freeway Oh well off to check the cooling system __________________ From now on, it's Diesel or NOTHING!!!!..except of course a 71 Cuda and a 81 Delorean ;)

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