replacing timing chains and tensioners

[Ace88]

i have a 1999 ford explorer sport 4.0 v6 sohc i have the otc 6488 kit to put it back together with. now can i get a kit with chains,tenstioners,and the gaskets that i need thanks

 

[Flash]

I got mine from ebay.

 

[Ace88]

I got mine from ebay.

thanks

 

[Ace88]

thanks

can i reuse my old head gaskets?

 

[rb142]

No.

Edit:
You don't need to remove the heads to change the timing set, so why would you need to reuse the head gaskets anyway? Do you mean the valve cover gaskets?

 

[Ace88]

i wanted to look and see if the pistons had any damage to them.and there is should i have the valves checked?

 

[rb142]

If the chain already skipped or broke, you can be sure that you do have valve damage, and you will have little valve divets in the tops of the pistons. If you are lucky, you won't have to do anything to the bottom end, but you should count on rebuilding or replacing the heads.

If it is just making noise but hasn't lost timing yet, then you probably don't need to open it up. You can verify the condition on things before you pull the heads off. If still possible, do a compression and leakdown test before you start pulling it apart. That will tell you the condition of the timing and valves.

 

[Ace88]

thanks rb142 that lets me know for sure that the heads need work yes top of my pistons are scarred

 

[BubbaFL]

If the chain already skipped or broke, you can be sure that you do have valve damage, and you will have little valve divets in the tops of the pistons.

Not necessarily. It depends on which bank, and where the engine was in it's rotation cycle.

My left bank chain broke and literally threw itself through the valve cover along with what was left of the cassette and guide assembly, but I didn't have a piston-to-valve collision.

Given the amount of work required to do a timing chain job on these motors, replacing the head gaskets while everything's apart is a no-brainer, IMHO.

 

[Flash]

If you have dents in the piston tops from the valves then the valves will be bent and won't seal.
It doesn't take much.

Chances are your pistons and rods will be ok.

 

[Ace88]

Ok thank y'all for your help

 

[rb142]

Not necessarily. It depends on which bank, and where the engine was in it's rotation cycle.

My left bank chain broke and literally threw itself through the valve cover along with what was left of the cassette and guide assembly, but I didn't have a piston-to-valve collision.

Given the amount of work required to do a timing chain job on these motors, replacing the head gaskets while everything's apart is a no-brainer, IMHO.

Yes. But what I meant is that if the chain hasn't yet skipped, it isn't necessary to pull the heads. If the chain has skipped or broken, then you do have to pull the heads to check (and will need gaskets). Once the head is off, it will be obvious whether there was contact. A valve strike equals valve work.