Thread: Heater Core
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Old 02-27-2019, 12:46 AM   #41
spidertri
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So after 21 years my 1998 ti finally needed the heater core replaced. If anyone wants specific photos let me know and I'll get some while everything is apart.

I got it out today and found that the core itself is not leaking but the four o-ring connections under the dash were all leaking. The o-rings were very deformed and hard when I took the old core apart. My plastic pipes at the firewall are extremely discolored but not broken, those o-rings were also in poor shape.

You'll need a torx T20, 10mm, and 8mm to get most of screws for the heater pipes apart.







These plugs came with the new heater core to minimize spills while removing the old one. Can also be used to hold some coolant in the core while you re-install.


Here's where the foam strips go, thin strip under the pipe connection end and the two thick strips run down the long sides of the core front/back.


Once all the hardware is removed these pipes need to be pulled into the engine bay a bit to get the lower connection apart.
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98 328ti Morea Grun slicktop
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