Silent Shaft Belt Replacement Problems

[royster]

Glad to have helped.

I agonized over this detail for a long time before I figured it out. Those Haynes books are horrible in some procedures...not sure if the Chilton is any better but I will get one. One of the great benefits of this forum is hands-on experience.

Let us know how the repair turned out, Amos.

http://www.mightyram50.net/vbulletin...gine-Reference

[amos_dugger]

Yeah the Chilton is no better. I have referenced the small manual, the large book that covers all vehicles, online references like autozone.com and they are all the same..... WRONG! So again thank you! OK, now... Since I already had it back together when I found this website and became a member, I figured I would go ahead and see if I was close. Now my new question, or problem... The truck wont start, or even try to start. I have spark at the plugs, and fuel at the fuel rail... but it wont even hit. I'm assuming this is timing related. I hope the ECU somehow smart enough to know the oil pump is out of time. All marks are correct... but as I turn the motor over by hand I notice that the marks are not on for every rotation of the cam... is that normal? I think its every 3rd rotation of the cam, that all marks are on... If the ECU is not smart enough or isn't equipped to automatically not let it run, then I have trouble. And if it is, wouldn't it kill the spark? Can I get to the correct plug without taking off the intake manifold? So lost on this one, I consider myself descent mechanic, but this is killing me! Thanks for everything

[royster]

Without looking at Roy's Garage, I don't remember if it's every 2 turns, the left side marks line up, and every 6 they all match up. I'll edit here in a moment.

EDIT:

http://www.mightyram50.net/vbulletin...ll=1#post26822
Check your timing belt syncronisation by turning the crankshaft clockwise six complete cycles (revolutions). The camshaft, crankshaft and oil pump timing marks will all align every 2 revolutions. The left-hand silent shaft will only be in alignment with all the other marks every 6 rotations. After 6 revolutions, returning to TDC, all your timing marks should align. (If they don't, bite-the-bullet and start the process over, or figure out which cog is off, where).

I would be suspicious of the distributor timing, from your symptoms. Make absolutely sure #1 is top dead center, ready to fire, then see where your distributor is pointing. There's a 4 year difference between our trucks, so I'm not certain of specifics (but they ARE both 4G64's)...so the distributor rotor should be pointing down, just past the cap clip, this is the position #1 is ready to fire. If the valve cover is off, you can watch the rockerarms to determine where #1 is. If not, rotate the engine while looking through the oil filler cap: you can see #1 exhaust rockerarm clearly, and follow the cycle from there.

As has been widely publisized on this forum: if your distributor is to extreme side (left or right) the distributor is likely off by one tooth, or
(*GULP!*)
the timing belt is off by one tooth.

I'll also tell you that it is SO EASY to be one tooth off with these motors: it really takes some patience and fenesse to get it perfectly right.

FURTHER EDIT: Once you get it started and up to operating temperature, be sure to use the timing connector to set the timing. This jumper-wire procedure is absolutely crucial to proper timing. Again, specifics are in Roy's Garage, see the menu (that's why I put it there: for future guys like me who need to know, in simple terms). I DO wish to again thank Komeuppance for his patient guidance for when i was going through this very same scenario, Amos.

[amos_dugger]

Wouldn't it at least hit or try to start at one tooth off? Mine isn't even trying which makes me wonder... but I will take a look at this tomorrow... Thanks again, and I'll let you know!!!

[royster]

You'd think it would try, but it depends on what moved where during the timing belt procedure.

I'm jus' sayin' to check that out and see. Simple first, then complex. Simple is often the answer.

Another thing I read on the forum is that the fuel injectors can get glogged up when they sit for long periods of time. I still recommend verifying the timing first.