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Discussion Starter #1
I have a new radiator cap for my Spider. It is the square type with a relief valve.

The new is identical to the old one ... except for a "small" difference:

The relief valve is rated at 0.5 bars and the original is at 0.7 bars

The water will boil at a lower temperature …. but how can it have influence in the cooling system?

Could I have problems using this radiator cap?


PS. I have a S2 spider
 

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The coolant temps should remain the same but you are correct that it will 'boil' at a lower temp. As long as that lower boiling point is still above any temperatures likely to be encountered, you'd not have a problem. But those are some ifs I do not know the answer to...
 

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ya i got the same thing from IAP as well. the little nozzle at the top pulls out pretty easily as well.

im looking for a proper replacement to make this one my backup now (whatever . theyre only 10$) but i did notice that other motronics from AR had that cap like the milano with a tube for overflow that ran into a drain-hole.

to be honest, in the hottest conditions with my AC flowing, the cap is kind of failing, just barely, and im finding occasional coolant-stains on the valvecover from it spraying out of there. this is with a new reservoir as well.

i dont like the new cap. gonna see if Vick's has an OEM one
 

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Discussion Starter #4
im looking for a proper replacement to make this one my backup now (whatever . theyre only 10$) but i did notice that other motronics from AR had that cap like the milano with a tube for overflow that ran into a drain-hole.
You can get the radiator cap from Alfaholics, ClassicAlfa (both in UK) and Alfa-Sevice in Germany.

I think I am not goin to use the new cap by now. I am not sure if the temperature wil be higher like the the coolant consumption.
 
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