Does anyone else have troubles with their radiator leaking under the radiator cap? Car is not overheating but every other day, I have to replace the coolant. I have replaced the cap but it still leaks. The overflow tank has been full and nothing is being drawn out of it when the rad gets low. I placed my hand over the rad neck hole when car is warm and could feel the vac drawing in the coolant from the overflow tank. I used a pair of channel locks and bent the locking tabs on the cap so that the cap will fit pretty darn tight. I will check in a day or so to see if that seals the neck. Does these radiators require the black plastic cap OM part in order to seal properly?

 

Dose the inside of your rad. neck have corrision or a funky build-up at the sealing area.

 

I have cleaned the inside of the neck as well as the top of the neck where the gasket part of the radiator cap would seat. I cannot feel any cracks or burrs around the top or the inside of the plastic neck.

 

IDK man, All I can think of is poor contact at the seal area, or a small crack that you just havent noticed yet. I'm kinda stumped

 

Yeah me too! I just wanted to ask on hear before I dropped $150 bucks on a radiator but I guess that is cheaper than overheating and ruining an engine. Thanks anyways!

 

^^^^ True! Have you had it pressure tested?

 

Not yet.

 

I think I would try that b4 I bought a new rad. That way you can see if it will hold press. and possibly find the leak

 

Mine had a leak right by the radiator cap on the plastic neck just below the cap. I tried appoxy but the seal won't hold. i would spend the cash and just replace the damn thing.