allum. vs. cast iron heads in a daily driver? - Hot Rod Forum : Hotrodders Bulletin Board
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Old 02-05-2002, 09:53 PM
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Arrow allum. vs. cast iron heads in a daily driver?

I was reading an article in CHP with alluminum vs. cast iron heads, but the only thing that was tested was how much torque they would make. BTW the alluminum heads won out.

I'm kinda curios in a daily application what the pro's and con's would be of alluminum vs. cast iron.

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Old 02-06-2002, 02:34 AM
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there are a lot of advantages to the alum heads you can run higher compression, usually the ports are better, much lighter ect...but from a daily driver point of view I'd go with iron, you know build it once and drive it. alum seems to develope problems over time because of different expansion rates between the two metals and head gaskets fail frequently this means a surface job and the rule is anytime an alum head is removed have it planed and how many times can you do that. So for durability and cost Iron is more effeciant especially in a daily
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Old 02-06-2002, 04:40 AM
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I agree completely. Iron heads hold up much better in a driver. Fewer cracks fewer blown gaskets. I have been told most stock engines with aluminum heads and iron blocks require head gasket replacement as part of the scheduled maintenance. I am guessing at around 50K miles. Exspensive proposition too! All of the four bangers that I have worked on that have needed the head gasket replaced also reqire new bolts. The kit with gasket and bolts typicaly runs 75-120 depending on the vehicle. The darn stretch bolts, One use and throw it away.

I do not know about aftermarket stuff but I would bet that they need stretch bolts as well.
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Old 02-06-2002, 07:25 AM
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yea that is pretty much what I was thinking, but I just wanted to very it?
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Old 02-06-2002, 05:26 PM
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IF weight is the issue, then aluminum, if not, you can make more power with steel. The thermo effeciantcies with steel are far and above superior.
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