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2003 explorer timing

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Old Oct 11, 2012 | 03:46 PM
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2003 explorer timing

Im working on a 03 explorer with the 4.0 v6 that overheated and blew the driver side head gasket. I went threw everything and replaced the driver side head gasket also took head to a machine shop to be checked over. Now the problem I have now is would the timing chain come off the crank sprocket or miss align if I did not use the ford timing chain tools? Would I have to remove the front timing cover to align or set the chain on the sprocket? Any suggestion?
 
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Old Oct 17, 2012 | 07:26 AM
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Originally Posted by erick2719
Im working on a 03 explorer with the 4.0 v6 that overheated and blew the driver side head gasket. I went threw everything and replaced the driver side head gasket also took head to a machine shop to be checked over. Now the problem I have now is would the timing chain come off the crank sprocket or miss align if I did not use the ford timing chain tools? Would I have to remove the front timing cover to align or set the chain on the sprocket? Any suggestion?
I can't help you on this but I do have a question for you. You had the engine apart so I'm asking lol. I have a 2000 explore with the 4.0 that needs the timing chain changed... Do you know if you have to tear the engine down to change the timing chains? What I meant was tear the engine completely down? Pull it out of the truck and tear the heads off etc. to access the timing chains?
 
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Old Oct 17, 2012 | 09:37 AM
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To answer both questions:

Yes, you need to use some kind of tool to hold the cam while you put the chain back on. You may or may not have to remove the front cover, depending on where the chain and tensioner are at this point.

As far as replacing "the timing chain", well, there are 3 timing chains.

--one is a conventional set going from the crank to a jack shaft where the old cam was

--one is in the front, going to the driver side cam

--one is in the back, going to he passenger side cam

The rear one requires engine removal to access.

By '03 I THINK Ford "fixed" the early timing chain tensioner issues. But, if you are high miles, replace it anyway.

A 2000 should have both done if it's high miles. Do you have noise from the chains?
 
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Old Oct 17, 2012 | 09:44 AM
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Originally Posted by 85e150six4mtod
To answer both questions:

Yes, you need to use some kind of tool to hold the cam while you put the chain back on. You may or may not have to remove the front cover, depending on where the chain and tensioner are at this point.

As far as replacing "the timing chain", well, there are 3 timing chains.

--one is a conventional set going from the crank to a jack shaft where the old cam was

--one is in the front, going to the driver side cam

--one is in the back, going to he passenger side cam

The rear one requires engine removal to access.

By '03 I THINK Ford "fixed" the early timing chain tensioner issues. But, if you are high miles, replace it anyway.

A 2000 should have both done if it's high miles. Do you have noise from the chains?
Yes, I do have some noise but I can't pin point it directly to the timing... What led me to believe I had a timing issue is the truck doesn't accelerate very well at all and it back fires as you're cruising along... And the noise of course. We have not checked the timing yet, just trying to do some research before I dive in. This is my first Ford so please pardon my newb lol.
 
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Old Oct 17, 2012 | 11:40 AM
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Would you guys happen to know if a 4.6 or 5.0 would drop right in and bolt up without issues?
 
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Old Oct 17, 2012 | 12:35 PM
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No. This will require a different trans and all the usual engine swap work with mounts, cooling, exhaust etc. If you can find a 5.0 donor, that would be the way to go.
 
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