Radiator cap? coolant leak

Darwins Child · 08-15-2016, 09:28 AM

The "diagnosis" of the leakage is complete. In short, the Nissan tech's statement on the pre-purchase inspection that the rad cap was leaking was incorrect. The small OEM clamp closest to the cap was what was leaking.

How do I know? Because I drove the Z for 3 hours on Sunday during 27C weather. Also got in a little bit of 120-mph "track time" on a remote "raceway". Checked for coolant leakage before, during and after this driving experience and there was absolutely none.

Likely the original cap was also not leaking, but because I had to return the cap to Nissan in order to get the replacement cap under warranty, I can't re-install it to determine absolutely that it was also not leaking.

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08-15-2016, 09:28 AM	#27 (permalink)
Darwins Child Base Member Join Date: Jan 2016 Location: Canada Posts: 165 Drives: '14 Z Tour+Sport 7AT Rep Power: 10	The "diagnosis" of the leakage is complete. In short, the Nissan tech's statement on the pre-purchase inspection that the rad cap was leaking was incorrect. The small OEM clamp closest to the cap was what was leaking. How do I know? Because I drove the Z for 3 hours on Sunday during 27C weather. Also got in a little bit of 120-mph "track time" on a remote "raceway". Checked for coolant leakage before, during and after this driving experience and there was absolutely none. Likely the original cap was also not leaking, but because I had to return the cap to Nissan in order to get the replacement cap under warranty, I can't re-install it to determine absolutely that it was also not leaking.