1.2 vs 0.9 (radiator caps)

I recall a post in the old forum regarding radiator caps with differing pressures. I've just purchased a reconditioned NA radiator (thanks Bruce), and my current cap (1.2 bar) is rusted and falling to pieces. Should it be 0.9 bar? Does it matter?

If this is in the tech articles somewhere, let me know coz I've done a quick search with no luck.

 

I thought 1.2 was standard cap for both N/A and TT.

My N/A has a 1.2 cap. I've had the car app 5 years and it's been fine.

Cheers,

Peter

 

I believe 1.2 TT 0.9 NA. But if you go to Nissan they only carry the 1.2 in stock for both

 

Where did you get those details???

If I could get a nissan site or manual or something that'd be awsome... I have to prove that a 0.9 bar cap isn't enough for a TT radiator.

Cheers

 

Nissan Moorooka Qld. 1.2 is standard for the TT. People sometimes put the 0.9 on thr TT to reduce the stress on the old coolant hoses which abound on TT's. Replace all the hoses, do an underplenum by-pass and fit the 1.2

 

Thanks heaps

Thanks heaps

 

sounds like a game plan for me also

 

So for a stock NA it wouldn't really matter whether its 0.9/1.2/1.3 (as seen on some aftermarket ones)?

 

Nope... 0.9 works just fine and 'preserves'

an aging original cooling system just that little bit longer. Make no mistake, the cap will NOT save you from an expensive overheat meltdown. It migt just buy you some time...

The proper solyution is to plenum pull and replace /bypass all under plenum hoses

 

I had a Nismo cap; I think it was a 1.5bar cap; caused radiator and heater core to die with the higher pressures in there. Stock caps ftw!