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Old 07-06-2002, 05:29 PM
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Post Heads installed backwards....is it possible?

On a small block chevy, is it possible to have the heads installed backwards? What I mean is, is it possible to have the head that is supposed to be on the right bank of the engine actually installed on the left bank and visa versa, or are the two sides interchangeable?
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Old 07-06-2002, 05:39 PM
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It should make no difference.
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Old 07-07-2002, 07:11 AM
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After years of throwing away perfectly good head gaskets I can assure you that you can't put them on backwards. The only problem I ever ran into was the possible loss of the threaed bosses for accessories, but that was only once, and I believe the reason was that the heads were not a matched pair. As far as operatiing the engine, no problem.
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Old 07-07-2002, 11:06 AM
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The reason I ask is that I am having oil pressure problems and one of the possibilities is that I'm pumping the pan dry because of oil drainback issues. I took off the valve covers from my Dart Iron Eagle heads to look at the oil drain back holes and I see two. There is one in front and one in back. I can't see down into the one in back but the one in front seems to not line up perfectly with the lifter valley, it seems to be half blocked (I can see part of the lifter valley and part of the deck), so I was wondering what the problem was, whether I had the heads on switched around or maybe the heads are machined wrong or the block is machined wrong. I dont' know, I'm fishing for answers to my oil pressure problem.
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Old 07-09-2002, 02:40 PM
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The heads, with the exception of the accessory mounting points are the same. You mentioned oil drain back. It is common that if you use a high volume oil pump you can drain the pan and pump a lot of oil into the heads and lifter valley at high rpm's. This is why Lingenfelter recommends against the use of high volume oil pumps unless you are going to increase the size of the drain holes going through the block and heads.
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Old 07-10-2002, 11:33 AM
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The only problem you might have is that the gaskets either have the holes in the wrong placement,or,there are not enough holes punched in the gasket,to line up with the oil flow and return passages. I did Chevys for a lot of years,and I've seen that happen,but,there is not a left or right in standard made heads. On special made aftermarket heads there maybe a left and right,because of special drives or mounts,but normally this would be one off specific design requests. I do Mopar now,and have run into the same type of problem with gaskets,for them. Sometimes you even might find more holes,this is so the gaskets can cover more years,with slightly different configurations,and sometimes there are holes there that make no sense at all.
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Old 07-10-2002, 04:18 PM
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what kind of pump are u using and at what rpm are u losing pressure and what kind of pressure are u running. the mellings oil pumps lose pressure at low rpm. same on dyna gear and some of milodens.
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