Preparing to swap heads. What will I need?

So I picked up a new engine a while back. One that actually turns! :?

The only issue is that the head is a bit mucked up. Somewhere along the line someone busted an exhaust stud boss? (the little bit of material with the threads) and decided epoxy was the solution...

I knew the issue when I bought it and luckily the head from my seized engine is fine and dandy so the pan is to swap 'em.

I know I'm going to need to break the timing chain but what else do I need to/should I replace while I'm at it?

Edit: Research says I don't need to break the chain. Mileage is unknown on the motor though so should I replace the chain while I'm in there or just let it be?

Also, I don't suppose anybody's got a link to a step-by-step for this? The only thing I'm not really sure about is making sure the cam is indexed with the crank. Any tips and tricks to make the whole thing go smoothly?

Thanks in advance,

~Rev.

 

This may seem like a smart-a$$ answer, but it is not intended to be. If you don't already have a factory service manual, and a Haynes manual, get one of each. I was a maintainance tech for several years and having the book nearby to look at (when needed) is worth 1000 times more than waiting on a reply from anyone (even the manufacturer's service department).

 

there's some o-rings in there, one for oil and four yics, silicone i think on the yics. lap the valves, if you do it matters how the springs go back in. might as well do new valve seals too. lucky me found a broken valve spring in mine

 

k-moe:

Just downloaded the fsm. Thanks for the input.

Polock:

It's a pre-yics engine. I'll assess the valves once I get 'em off. Thanks.

 

LAP the valves, and absolutely replace the valve stem seals.

Check the valve spring free lengths against spec, and as Mr. P pointed out, they go into the head in a particular orientation.

The FSM is indeed a requisite; read and re-read the cam timing section before you crack into it.

In addition to the o-rings, be very aware of the condition of the cam chain gallery seal; if it's crispy then replace it even though it's a tad pricey. You can't muck with oil pressure in these motors; if you cut corners inside bad things will happen.

 

http://www.xjbikes.com/Forums/viewtopic ... rt=30.html

Pray you don't need this thread: :lol:

http://www.xjbikes.com/Forums/viewtopic ... chain.html