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4.6L General Discussion This section is for non-tech specific information pertaining to 4.6L (Modular) Mustangs built from 1996 to 2004.

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Old 05-06-2013, 10:00 PM   #1
Herz
 
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Default Engine Question Regarding Cylinders

I have the 4.6 DOHC in my 96 and after replacing the plugs and coils find that cylinders 1 and 3 are both bad. My engine only has 80k on it and I really don't want to replace it with other engines out there with more miles. I know it will probably be the best to pull the engine completely out and work on a stand. I am curious to know what kind of job I am looking at to replace my cylinders? Is this going to be worth my time in the long run?
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Old 05-06-2013, 11:01 PM   #2
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Replace the cylinders? What exactly do you mean? Re-sleeve the block? That would be for a machine shop to do.
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Old 05-06-2013, 11:27 PM   #3
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I honestly think I would just buy a new block at that point. You can find them cheap enough at junk yards.
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Old 05-07-2013, 08:00 AM   #4
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Sry I think I was tired last night. I meant changing the pistons.
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Old 05-07-2013, 09:20 AM   #5
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Have you done a compression test to be sure it's your pistons/rings that are bad?
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Old 05-07-2013, 09:38 AM   #6
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Yes I have that's how I found out 1 and 3 were working properly.
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Old 05-07-2013, 10:29 AM   #7
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what are the comp. results for all 8 cylinders? could also be a valve problem
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Old 05-07-2013, 10:54 AM   #8
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Quote:
Originally Posted by BraMas View Post
what are the comp. results for all 8 cylinders? could also be a valve problem
1 had 0 and 3 had 75, the rest were normal.
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Old 05-07-2013, 10:15 PM   #9
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Well that sounds like rebuild time. Your options are buy a short block from any # of places on the net that have 4.6 shortblocks
Build it your self will probably by close to 2K when you figure in new Pistons and rings,bearings,gaskets and all new bolts because OEM bolts are TTY (one time use). I'm sure you can do it cheaper than $2K but you really have to shop around for good prices
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Old 05-08-2013, 09:33 PM   #10
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Budget, goals? If you just want to get back to stock performance, you should be able to find a complete motor for your car for $800-900 in excellent condition. If you can't find a '96-98 motor, then a 2001-2011 2v 4.6L Romeo (01-04 Mustang or 01-11 Crown Vic/Marquis/TownCar) can be found with low mileage and nearly as cheap (cheaper if you look for a Vic motor).
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Old 05-08-2013, 09:33 PM
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