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Unread 08-26-2002   #1 (permalink)
randy964.6 is offline Made Member

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Talking '98 4.6 DOHC swap questions

What would you guys give for a '98 Cobra engine? It needs to be rebuilt because the bottom end is done, but it has 28,000. What's a rebuild cost for that? (Parts only, I know a master tech that can help me with the rebuild.)
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Unread 08-26-2002   #2 (permalink)
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are you talking heads, intake, computer(if required) and everything?
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Unread 08-26-2002   #3 (permalink)
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Normally, it costs less to buy a new one instead of rebuilding an old one.
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Unread 08-27-2002   #4 (permalink)
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Yeah, a complete engine, oil pan to intake, no computer though.
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Unread 08-27-2002   #5 (permalink)
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you'll need the computer too or you'll run into problems if you got the sohc computer in there...
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Unread 08-27-2002   #6 (permalink)
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I know, but how much to just rebuild the motor?
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Unread 08-28-2002   #7 (permalink)
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I've scoured the net. I cannot find a rebuild kit for those engines. I knew that you would need new rods due to the fracture caps, but even bearings are not available yet. See how much Ford would give you as a core for a new engine...
There aren't internal replacements available yet.
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Unread 08-28-2002   #8 (permalink)
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Wow, that sucks. Thanks for looking though Adam. Appreciate it!
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Unread 08-28-2002   #9 (permalink)
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As I said above...

It costs less to just buy a new Cobra engine, than to rebuild an old one.
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Unread 08-31-2002   #10 (permalink)
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The 2002 Ford performance catalogue lists a 5.0 liter fitted block (bare block, pistons, rings) and new high flow heads. Build one of these up from the go-fast service parts bin for about 4 grand. It is supposed to make 400 HP and is all Ford. I am going to do that when I get mine paid off so I can pickle the original engine and go hog wild without destroying the collectable value of my car.<p>The numbers matching low mileage bone stock engine will still be there when I am an old geezer ready to sell my classic 01 Cobra.
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Unread 09-02-2002   #11 (permalink)
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Check summit racing equipment. I know they have a kit for both the sohc and dohc motors. Their kit will only have gaskets, bearing, freeze plugs, pistons and rings. maybe some other stuff. don't expect a new crank or rods... you really don't need them any way. As for your heads, contact Sean Hyland motorsports check an issue of MM&FF for an address. Back to the bottom end. Contact a REPUTABLE machine shop in your area that does a lot of performance/race work, and get a price on balancing , machining and assembly. Unless you are running lots of boost, nitrous, or do racing only, I would go with hyperuetectic (I hope I spelled that right) pistons and not forged. Forged won't last as long, and will cause the car to use oil if you drive it before it's completely warmed up.... They are way stronger though. Hope this helps a local machine shop may have other parts sources, so will your ford dealer (parts dept.) Lots of people advertise rebuilt crate motors in MM&FF Lots of forged reciprocating assemblies (crank, rods, pistons) available there too. It's all out there, I promise!
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Unread 09-02-2002   #12 (permalink)
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Not to sound like an English teacher. but its Hypereutectic... it sounded like you wanted to know..
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Unread 09-02-2002   #13 (permalink)
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Great thanks for all the info guys.
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Unread 09-06-2002   #14 (permalink)
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For pricing on engines , heads, etc go to http://www.karkraft.com/performance_parts.htm
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