Engine/Transmission (1994 - 1998) EngineTiming-Help

[BTanzini]

This is the first time that I myself am ajusting the valves on my truck and I am having a hard time finding top dead center with the timing pin. I am pusing in on the pin while turning the crank with a rachact but can not hit the exact spot for the pin. Right now I beleive I have top dead center or close to it but can not push pin in. I took the timing pin out to make sure that it was still intact which it is. Is there any other way of determining

T D C? Thanks for any help.

 

[SEmerson]

use a mirror to look in the hole where the plug goes. You can see the hole in the gear.

 

[Woodenhead]

I cranked the adjuster down on a valve for #1 cylinder and cranked the motor slowly until it hit the valve. Mark the balancer. Then cranked the motor in the opposite direction until it hit the valve again and marked that spot. The point 1/2 way between those marks will be TDC. Check the valves to see which ones are loose because it could either be TDC on exhaust stroke or TDC on compression. Set the valves and rotate 360 for the others. There is a much more detailed explanation of this somewhere on the TDR.



I used my timing pin once and ended up snapping if off.

 

[BTanzini]

Thanks for reply- but I could not see the hole if I was looking right at it whit my eye sight and the location. I have been useing a smalle allen wrench so as I turn the engine hopefully it would drop in but dose not. I am 99. 9 % sure Im at TDC but still can not hit it. Im wondering if the timing gear is on revese?Is that, possible?

 

[K5IP]

Not to insult you and you probably understand, but just in case, remember that you only find tdc every other engine revolution, i. e. 720 deg.

Rog

 

[BTanzini]

I tried 4 two hours turning the engine countless times but could not find TDC even with a smalle allen wrench inserted in the timing hole while turning. I noticed that there was no retainer holding the Timeing Pin inplace, will it blow out with oil pressure?

 

[JTroiano]

Its got to be there. I just do one cyl at a time and the heck with timming marks. When one valve is down you should be able to adjust the other on that one cyl. Just keep checking the clearance as you rotate the motor. You can find when you are on the other side of the lobe. Its the only way I adjust valves on everything. I usually hop around and mark the ones I've adjusted so I don't forget any. If you pull the timming pin out and use a flash light and mirror it usually works. Once you find it mark you crank pulley and case with white touch up paint for next time.



Jon T

 

[InfernoB]

TDC #1 will show the valves on #6 rocking. When you are sure you see this, then check the bolts on the damper. They will/should be square. Place a mark on the damper and gear cover. Confirm TDC by rotating 360 degrees to mark. The valves on #1 should be rocking now making the #6 cylinder at TDC. To get the mark the first time it is almost a 2 man job.

 

[JFaughn]

Unless you just want to know where the timing is , just forget the the pin , if it hasn't slipped , it may of may not be a factory setting .
Use either of the 2 methods above , the drop valve method , not my 1st choice , or the overlap method , my 1st choice - the way I remember , find the companion cylinder [ put the firing order in 1 column , then take 1/2 the cylinders to make a second column , now the 2 cylinders numbers at the top are companion cylinders { this is for all engines ,6 cyl. , V8 ect } in this case with the Cummins its #6 ] when like mentioned above , the 2 rockers of # 6 are moving , one opening & the other closing , the engine is at top dead center .

 

[Dieseldemon]

For adjusting the valves you don't have to be exact turn the engine until the #2 ex valve(the long rocker) is all the way open that is top dead center then turn the engine until the #5 ex valve is all the way open and do the last half and you are done.





First half is #1 in & ex #2 in # 3 ex #4in #5 ex

Second half is #2 ex #3 in #4ex #5 in #6 in & ex

 

[BTanzini]

Dieseldemon, thanks for imformation, that is what I had but was affraird I might be a little off. Thanks again, Im just puzzed why I could not set timing pin.

 

[BTanzini]

Is there a coller inside the Timing Pin Assy to keep the pin from going in all the way or could the coller be the timing pin retainer miss positioned? Thanks

 

[Dieseldemon]

Find exact TDC with the drop valve when you find exact TDC loosen the hsg that holds the timing pin and move it until it drops in the hole in the cam gear that will be TDC with the pin. I think the pin is misaligned with the cam gear.

 

[JFaughn]

I thought I read that the timing pin in its stock location was 12. 5 timing , not TDC .

 

[Vaughn MacKenzie]

You're probably thinking about the timing pin on the pump. . . it drops it at stock timing with the engine at TDC. The timing pin on the gear case only indicates TDC of piston #1, it is not affected by where the pump timing is set.

 

[JFaughn]

Ya , I did not get what Dieseldemon was mentioning , ? hsg ?

 

[BTanzini]

Vaughn MacKenzie- I'm talking about engine timing pin, not injection timing. thanks

 

[Dieseldemon]

The hsg that holds the engine TDC pin is movable when you find absolute TDC

loosen the hsg that holds the pin and move it around until it drops in the hole in the cam gear I am assuming that the tip of the pin has not been broken have you pulled the pin out of the hsg and looked at it if not that is where you will have to start.

 

[BTanzini]

That is one of the first things I did after not finding TDC. Thanks

 

[JFaughn]

Dieseldemon , I was hopping that you would get more specific when there are questions about what you are saying , like give the full wording of hsg would be a big help , and where ?
By your description , it sounds like the timing cover is removed ?
Pictures & a 1000 words come to mind .
Thanks John