Dad's 69 Dart 440 4 speed
01-12-2011, 07:56 PM
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We have never had it on a dyno, but it runs pretty good. It is 440 six pack rods and pistons, edelbrock performer aluminum heads, mopar purple camshaft, Harland Sharp roller rockers. I am getting ready to build a 500+ inch stroker for it. We have a problem with the 440 that we can't get to stop. It builds pressure in the cooling system and pushes the coolant out the overflow. We have tried everything. Changed to an electric water pump, had the heads milled, new head gaskets, and other stuff I can't remember. The only thing left we can think of is a crack in a cylinder wall.
01-19-2011, 04:04 AM
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edelbrock performer "aluminum" heads,
We have a problem with the 440 that we can't get to stop. It builds pressure in the cooling system and pushes the coolant out the overflow. We have tried everything. Changed to an electric water pump, had the heads milled, new head gaskets, and other stuff I can't remember. The only thing left we can think of is a crack in a cylinder wall.
So your cooling system won't depressurize or over flows because the minerals in the tap water ( copper, iron, etc. and even salts) can cause aluminum corrosion. Hydrogen is generated by the corrosion of aluminum at extreme pH levels ( acid or base conditions).
Use only distilled water. You should flush the system very well with distilled water first. Use only a good quality anti-freeze and a small bottle of anti-rust.
Hope this helps, that is if you were using tap water.
Randy
01-19-2011, 04:18 AM
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Are you using tap water? If you are this could be the problem.
So your cooling system won't depressurize or over flows because the minerals in the tap water ( copper, iron, etc. and even salts) can cause aluminum corrosion. Hydrogen is generated by the corrosion of aluminum at extreme pH levels ( acid or base conditions).
Use only distilled water. You should flush the system very well with distilled water first. Use only a good quality anti-freeze and a small bottle of anti-rust.
Hope this helps, that is if you were using tap water.
Randy
So your cooling system won't depressurize or over flows because the minerals in the tap water ( copper, iron, etc. and even salts) can cause aluminum corrosion. Hydrogen is generated by the corrosion of aluminum at extreme pH levels ( acid or base conditions).
Use only distilled water. You should flush the system very well with distilled water first. Use only a good quality anti-freeze and a small bottle of anti-rust.
Hope this helps, that is if you were using tap water.
Randy
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