460 bb with 750 dp

i bought a 1975 f100 twin cab ...[aussie right hand drive ]with a 460 big block...when I went to view and start it was popping preety bad from the small whelsh plug in the front of the block behind air con motor [on the left hand side]...no water or oil was coming out except air[popping]....or should some fluid of some description be comming out it...can someone tell me is this usual or is there a cracked head..head gasket...or someother explanation..like would the radiator be blocked somehow.....it seems to always run hot to near boiling

effy055 wrote:i bought a 1975 f100 twin cab ...[aussie right hand drive ]with a 460 big block...when I went to view and start it was popping preety bad from the small whelsh plug in the front of the block behind air con motor [on the left hand side]...no water or oil was coming out except air[popping]....or should some fluid of some description be comming out it...can someone tell me is this usual or is there a cracked head..head gasket...or someother explanation..like would the radiator be blocked somehow.....it seems to always run hot to near boiling

If it's a plug in the head you're talking about,if so it's probably from the smog pump IIRC and i've had it happen to me years ago?

thanks for the reply ...yes it is in the front of the block on passenger side ... is there a solution to stop it overheating ...IF..this is the cause of it thank you

It shouldn't have anything to with the engine overheating IMO unless the timing is off which IIRC is how it happened to me.

This is the only image I could find on the egr crossover tube. It should be your leak but it shouldn't have anything to do with your cooling issue as stated above. You can just make a small plate to cover the holes or put a frost plug in if you can get the right size.

thanks for the info appreciated