Replacing the timing chain......
 

I replaced the timing chain on my 91' at 125K. But even then I noticed it didn't really need it as much as I thought it would. (Wasn't giving me problems, just thought 100-125k was a good mileage to replace it). What about these new motors? On my 5.3, should I worry about it? When would I do it?

RE: Replacing the timing chain......
 

I have never heard of having to worry about it.

RE: Replacing the timing chain......
 

nahh..they don't shear anymore

RE: Replacing the timing chain......
 

So.....only change it during a rebuild or when you have a specific problem with it?

RE: Replacing the timing chain......
 

I would..I've not seen one fail on a 99 or up truck yet

RE: Replacing the timing chain......
 

Well thats good to know cause I don't know if I like the idea of doing it myself on this thing with all the electronics. I admit Im a little intimidated about this engine compared to my old TBI.

RE: Replacing the timing chain......
 

its actually simpler than tbi in a sense...do distributor..no throttle..

RE: Replacing the timing chain......
 

Bout the same amount of time you think?

RE: Replacing the timing chain......
 

yeah,no biggie,...getting the fan off can be a pain without the right tools though

RE: Replacing the timing chain......
 

Yeah I know I couldn't get it off with what I have at home. (Back when I tried to put on electric fans)