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nub
Dodge Dakota
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7/17/2005
03:00:59
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 Subject: heads
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Message:
i was wondering if i could put heads from a 90 3.9l into my 99 and if i could would there be a good chance of leaking sense theres been 160k put on them, or would i be better off buying new ones from a dealer? how much would a set cost?
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93dak4x4
Dodge Dakota
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7/17/2005
22:36:10
|  RE: heads
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first of all I dont think that would work. second of all that would be stupid. the 90 dakotas were premagnum motors. the heads flow worse and would see a dramatic drop in power not to mention i dont think they are the same in other aspects. so no. but you could find a set off of any 239 from 92-up
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swapman
Dodge Dakota
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7/18/2005
10:53:26
| RE: heads
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the premag heads don;t have the same collant flow channels. they wont work and also yes they will flow worse. part of the magnum design was better heads. so go buy some dealer ones. or hit s junkyard jsut make sure you get the magnafluxed for cracks before you get them installed
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nub
Dodge Dakota
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7/19/2005
18:50:09
| RE: heads
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i want to get heads at the junkyard but the newest model is 90 and besides i was planning on porting them. does anyone have an idea how much the heads might cost at the dealer?
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daddio
Dodge Dakota
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7/19/2005
18:56:37
| RE: heads
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try www.car-part.com. they can search salvage yard all over the country. those yards will ship to you.
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93dak4x4
Dodge Dakota
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7/19/2005
19:13:31
| RE: heads
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in my experience its not worth ordering anything from the dealer. there is a good chance you could buy an aftermarket race head (if they make it) cheaper then the stock head from the dealer. just do some online searching or local junkyard searching, if you do some digging you will find some.
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gen1dak
Dodge Dakota
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7/21/2005
21:20:42
| RE: heads
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nub, just say NO! They'll bolt up to the block, but even ported, you're giving up valve lift with the reduction in valve ratio (LA has 1.52, Magnum has 1.6). You'd need different length pushrods, hollow of course, to supply oil to the rocker shafts. You do know the rockers are different, right? Naturally, you could add 1.6:1 roller rockers. Still, the Magnum intake will not fit with LA heads. Don't go backwards. Get Magnum heads.
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