Blown 440 head gaskets

[Morris'_Mopars]

   

Tell me about it!!

[Plum6Pak]

It sounds like you are experienced enough to tell when you have a blown head gasket but what is it doing? Are you getting compression into the radiator, water out from between the head and block or? Is there a chance it's something else? I had a similar situation with an oil leak that appeared in all honesty to be coming out from between the 5 & 7 exhaust ports right between the head and the block, I ran it till I was tired of trying to see some other problem and hoping for it to be something else. I finally replaced my valley pan and intake manifold gaskets and it totally cured the problem. Just something else to consider it being something else unless you see the evidence on the head gasket of the damaged area.

[moper]

When everything you look at and address for a problem is definately right, then you're looking at the wrong thing. So what is the symptoms you keep finding..


Last year I did a fresh set of 915s for a guy who "kept blowing head gaskets". He kept finding an external coolant leak at the track, or after a long hard beating session on the street. It was a crack from the #3 exh port to the exterior surface of the head. The fluid would appear at the parting line between the head, gasket, and block. Sometimes drip a little, sometimes just a stain of green down the block behind the headers. Hopefully it's nothing big.

[Morris'_Mopars]

I have no idea....the car runs great but if I get on it a few times it seems to pop the gasket by the dowl. No coolant leaks that I have found and compression is good.

[Grancoupe]

Not sure if this is worth considering but the next time you do the head gaskets, can you swap the heads? See if the problem follows the head or stays with the block. This will atleast give you something to aim at. I noticed you mentined that you changed block. I assume you said that because you kept hte same heads? However I would still try it incase its something else thats causing the headgasket to fail in that spot.

[moper]

How do you know it's blown? Coolant come out the parting lines? Oil out the parting lines? Engine run funny? Smoking?

[Morris'_Mopars]

leaking coolant out the front by the dowl pin, white smoke and lack of power (7cyl)