Thread: Coolant
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Old 01-20-2026, 06:42 PM
punkin punkin is offline
Senior Chief
 
Join Date: Aug 2016
Location: Northern Colorado
Posts: 343
Default Coolant

Good day everyone,

I'm replacing a heater core on my 69 f-body project. I have aluminum heads, intake and radiator and just realized that the heater core is copper. Curious to hear recommendations for coolant type with a mix of these metal types.

I'm trying to take in a lot of technical information but I haven't seen anything that directly addresses this question but I think HOAT looks like it might work.

I appreciate your recommendations.

__________________
1968 Firebird
IA2 522
340 E-heads
Northwind 950 Carb
4L80E
3.50:1 Rear

1969 Firebird
IA2 535
Northwind (Induction undetermined)
3.50:1 Rear