Radiator Questions

[Tynee]

Well, I pulled into a parking spot at Wal-mart yesterday, and when I got out I could hear a whistling sound coming from the front end. Long story short, I found the leak in my cooling system finally.

The questions I have are:

1) Would a pin-hole cause the truck to run hot simply because the pressure is bleeding off? Obviously it would run hot once the coolant level got low, but what about when the level was fine?

2) If I head out to the local pick&pull, what should I look for to try and get a 4 core radiator? If I can find one, what all do I need to pull to install it in place of my current 2 or 3 core radiator?


Thanks for your help.