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Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain.

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Old 04-01-2014, 01:22 PM   #1
sw20kosh
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Engine Coolant system

At cruising speeds my coolant temps will stay at 190-192.

Once I hit traffic it will creep up to 230ish within a minute or two and then it will suddenly drop down to 190 again when the fans come on. Then it will creep back up to 230 etc...

I have the robispec giant radiator. Does this sound like normal operation?
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Old 04-01-2014, 01:26 PM   #2
JDKane527
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That's not normal. Could be low on water, or leaking at the drain plug. Inspect the radiator cap to ensure its clean. I used some GM coolant tablets that CBR recommended I try for any small leaks, and it clogged up the radiator cap. Fluid could flow out of the system, but not back in. I had to clean it out with distilled water and replaced coolant fluid.

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