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Overheating

Tiny
QUA2468
  • MEMBER
  • 2007 BMW 328
  • V6
  • 2WD
  • AUTOMATIC
  • 226 MILES
I have replace the thermostat, change water pump, replace electric fan, replace reservoir and bled the thing over and over. Going to bleed again tomorrow. L also replace cooling sensor twice. Okay I have done it all. Now the real question is could my radiator be clogged because top hoses are hot and bottom are not or could it be the after market water pump not putting out enough?
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Wednesday, November 15th, 2017 AT 3:50 PM

7 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,747 POSTS
Since you replaced everything and it is still overheating, the only thing left is the radiator. It must be corroded or plugged. As far as the water pump, they should meet the manufacturer's specs, so that should not be the problem. I would try flushing the radiator with a quality product and high pressure or having it done professionally.
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Wednesday, November 15th, 2017 AT 8:42 PM
Tiny
QUA2468
  • MEMBER
  • 8 POSTS
Okay, yesterday I went bought and put in a new radiator, I bleed the line one cycle an car still was saying need coolant. Do you think I may have burnt it out or do I need to bleed line some more before I buy another one for the third time? Omg I am going broke with this car. Imagine if I did not know how to replace parts?
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Friday, November 17th, 2017 AT 3:10 AM
Tiny
QUA2468
  • MEMBER
  • 8 POSTS
Okay, I have bleed car three times this morning afterwards I started it up got heat wide open up to this point I been sitting in idle for thirty minutes car has not ran hot yet and fan has not came on. But, it is forty five degrees outside so I turn car off for a second to see if need coolant appear an as soon as I removed key it said need coolant. I started right back up because I want to see when fan gone kick in. But why does the coolant light keep appearing?
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Friday, November 17th, 2017 AT 8:12 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,747 POSTS
Something doesn't see right. I hate to ask, but are you sure it's overheating and doesn't have a bad sensor falsely indicating it's overheating?
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Saturday, November 18th, 2017 AT 9:21 PM
Tiny
QUA2468
  • MEMBER
  • 8 POSTS
Im sure its overheating because I run it so long the other day than drove it an as overheating does it started losing power an than stopped, im going to put a nee thermo and pump in this thing again this weekend also a new sensor if that doesnt do it im done, to the scrap yard it goes but thanks for the advice u given me
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Monday, December 18th, 2017 AT 4:44 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,574 POSTS
It sounds like it could be blown head gasket here is a guide that will confirm the failure.

https://www.2carpros.com/articles/head-gasket-blown-test

and

https://www.2carpros.com/articles/engine-overheating-or-running-hot

Please let us know what happens.

Cheers, Ken

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Wednesday, December 20th, 2017 AT 2:44 PM
Tiny
QUA2468
  • MEMBER
  • 8 POSTS
Ok I will thanks
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Sunday, December 24th, 2017 AT 1:40 AM

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