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I have a radiator without a radiator cap.

Tiny
ANONYMOUS
  • MEMBER
  • 1985 BMW 325
  • 300,000 MILES
I have a radiator without a radiator cap reservoir, and I am stumped on how to fill it with coolant after flushing the system and replacing some hoses and the fan.

Again I just need to know how to fill the radiator with coolant when it has no radiator cap to poor into.
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Wednesday, February 13th, 2013 AT 8:57 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,256 POSTS
There is a small plug on the top of the radiator on one of the tanks, remove the cap and fill it from there. There might be a bleeder on the top of the thermostat housing that will needs to be opened.

Please let us know what you find so it will help others.

Best, Ken
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Wednesday, February 15th, 2017 AT 3:00 PM

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