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Discussion Starter #1
I know that the 4.6L has a timing chain, and not a t-belt.

Is the 4.6L an "interference" type engine? does the pistons and valves smash in to each other if the t-chain breaks?

What's the recommendation for changing/checking the t-chains? I didn't find anything in the maitenance booklet(I read through it pretty fast, though)
I know some cars have to have them changed every 60K miles or so.

Has anyone had to change the t-belt in a 4.6L?
My engine has 93,000 mies...should I be concerned, and have it inspected? (the engine doesn't show any trouble symptoms, but then I don't what exactly the symptoms would be, either..:)
Any comments are thankfully welcome.
 

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people have went over 200k with the stock chains and they havet had a problem dont worry about em they wont break and if they do break you could bent a valve but you dont need to change em in my opinion unless your doing like a cam swap or head swap and you want to do it just to be safe you can i changed mines when i did the head swap .


Jurgen
 

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if those things break ill give my car away to a homeless man....i have some if you want me to go wild and test the durability of them
 

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I was told they are not interference motors...... like if you brake a chain the engine shuts off and all you have to fix is the chain....on the other hand you break a honda timing belt just go ahead and price youeself a new motor!!!

-Derrick-
 

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The pistons will hit the valves if a 4.6 is not timed right. If chain(s) break, damage would almost certainly result, probably in the form of bent valves. I read somewhere that these chains were designed to go at least 200K. Besides, look at all the crown vic taxis that can get 300-400K with no internal engine work. I would let the chains go until 200K or so, unless I was really bored. Or wait until you do a headswap or some other kinda internal work on the car. If you do the chains, pick up the one piece crank sprocket, just for fun. :D Hope this helps some man
-Rob
 

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Per the OEM Manuals, the 4.6L is an interference engine.

Remember that the timing chains have self-adjusting hydraulic tensioners, so there isn't a lot of slack when the get worn. And the later ones (93+ I think) are double roller type, so they are very good chains.

I have 260K on my 4.6L and it's still running like a champ (knock on wood. :D )

Just my .02. :thumbsup:
 

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a t-chain wouldnt result in a sound of a rod knock almost if it were to go bad...... just curious i had to replace my motor cause i hear a rod knock sound car ran great but it sounded like some one was hitting the block with a sledge hammer lol some one told me could have been a timing belt scince i saw this post thought i would askk


thanks
tommy
 

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Discussion Starter #9
Thanks for all the great replies/info/advice/support !!!

I do feel a lot better, and I guess I can relax for quite a while before worrying about the t-chain, then.
 
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