Parts for your 1991 Nissan Primera-Coolant

1991 Nissan Primera Coolant — what it does, why it matters, and how to look after it

Coolant is absolutely relevant and used on the 1991 Nissan Primera. The 1990–1995 Primera (P10) Factory Service Manual specifies a pressurised liquid-cooling system for GA16DE and SR20DE engines that runs ethylene‑glycol–based long‑life coolant, and Nissan service literature of the era calls for Nissan Genuine Long Life Coolant (green) meeting JIS K2234/ASTM D3306. General repair manuals (e.g., Haynes for Primera 1990–1999) echo the same system and maintenance intervals.

For this classic Primera, coolant does a lot more than stop the engine from boiling. It shifts heat away from the cylinders, raises the boiling point, lowers the freezing point, and lays down corrosion inhibitors that protect the alloy head, radiator, heater core, and the water pump seals. Without the right mix, you’ll see temp swings, scale build‑up, and early component failure — not fun on a tidy P10.

What should it run? A quality ethylene‑glycol IAT “green” long‑life coolant that meets Nissan’s period spec (JIS K2234/ASTM D3306). In Australia and New Zealand, a 50/50 mix with demineralised water is the sweet spot for year‑round protection