Still overheating!!!! *%&$@#!

[72 cuda]

Just to chime in,there is a additive to the radiator you can buy at NAPA that turns yellow in the presence of O2.
I believe it comes as blue.
If it turns yellow you have a cracked head or gasket or thin wall crack.
For the money (6 bucks ) why not?
Mark 

[422STROKER]

Jeff, How'd you make out?

I have a clutch fan set up kicking around to try if You don't want to take the Barracuda apart.

Tom

[torredcuda]

Didn`t have time over the weekend.  My buddy also suggested the dye to make sure there is still not a leak.We just did the head gaskets but there may be a crack somewhere?

Tom,maybe I`ll take you up on borrowing your fan setup and we can buff out your scratch at the same time?

[ntstlgl1970]

If you or a buddy has access to a 4 gas (i.e. smog machine) analyzer, you can use that to sample the air in the radiator. A blown head gasket/crack etc. will show a couple hundred PPM of hydrocarbon on start up cold and change if you rev the engine up. The fluid color change test (the napa fluid mentioned) is reliable as well.

[Chryco Psycho]

put a pressure tester on the cooling system & see if it drops

[torredcuda]

Checked out the radiator for CO and it came up negative so no head gasket leak or cracks in cylinder head or block.Tomorrow night we`ll give the tune up a once over for timing/fuel mixture etc. and go from there. 

[4 speed fish]

My 440 has a MP aluminum water pump housing,OE Replacement 26'' radiator,mopar shroud,clutch fan 5 blade,180 ts.Car runs cool all the time. CP, does the cam play a part with the heating problem of some cars?

[1970 RT Challenger 1970]

I run an electric fan on the 440, no problems idling, cruisin', etc. She runs cool.