Thread: Heater Core
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Old 07-08-2021, 01:10 AM   #42
paul somlo
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Join Date: Sep 2006
Location: Greeley CO
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Regarding the plastic pipes at the firewall, PN 64118391141, pictured in post #14:

After removing the single nut, there is also a retaining tab that is difficult to see, as it interfaces with the upper edge of the part. The retaining tab needs to be lifted to free the part.

Also, the ridiculously overpriced orings (64118379131) that BMW sells, are 13/16" ID, 1" OD, and 3/32" cross section. $0.69 each at my local hardware, but if you buy 100, they run about 6 cents each. The oring is formally known as an AS568A-117.

And regarding the rubber "grommet" that the two plastic pipes protrude through; mate these parts before attempting to install the plastic pipes.

Last edited by paul somlo; 07-15-2021 at 02:34 AM.
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