cooling sustem

[baltobernie]

You may have a couple of things going on here ...

First of all, the correct pressure for a Spider radiator cap is 11.6 psi. Strange number? No, it is 0.8 bar, and that's what you will get if you buy your cap from one of our vintage Fiat vendors. Please don't buy parts from local auto parts stores for old Fiats.

Second, and you would know this if you visited, for example, the IAP Web site, there are two different neck sizes on Spider radiators. Just like with everything else on your car, you can't go by model year when working on them. Most of our cars have had various bits swapped out over their lifetime.

I don't know what radiator you have on your car, and neither does Auto Zone. Go measure it and order the correct Italian radiator cap from somebody who knows our cars. If that doesn't fix your problem, THEN you can start thinking about head gaskets, etc.

Sorry I'm in a bad mood. I'll make it up to you ...

[brackie1]

thanks for your post. sorry your in a bad mood. the new rad I installed came from IAP and it has a 1" neck. all I kno is that with rad cap I bought and bleeding the upper heater hose flush valve the problem went away. I am going to re-install the rad cap that came with the new rad and we will see what happens.

[baltobernie]

Sometimes a vendor ships the wrong part. Verify that the cap they sent you is correct for the radiator they sold you.

Even with the cooling T added, you still have the heater valve fully open when filling and first couple of runs, yes?