lifter issue and rock arm registration

[Lou C]

Remember the engine serial # is at the front of the block the casting # is at the rear.
It’s also possible that someone put an earlier set of heads on that engine.

 

[alldodge]

when you said: All the rocker nuts should go down the same amount; you meen 0 lash + 3/ or 27 nm?

In post 6 the pic shows some of the rocker nuts are not at about same position a the others, this is why I mentioned it

If not all had been torqued to 27nm then that also would be the reason

I'm wondering if some of the lifters are hanging up inside or on outside in the bores.

but anyway when i bought this motor it was already disassembled and lifter were in position, so i don't know ( i doubt) that old owner did this bfore disassembling so i'm not sure he put is same position. anyway

I wonder if you have a mix bag of parts?
How long are the push rods?

 

[ste80]

Ayuh,...... That cylinder doesn't appear to be at Tdc,......

I'm in the line in armonic balance shaft
1st in tdc and number 4 in valve balanced condition. I will double check just that i didnt rotate 180 but i'm 99.9 % sure

 

[ste80]

with non-adjustable valve train on the 4.3, just snug up each of the rocker fulcrums to the stop location on the stud. then torque to 20 ft-lb (27 Nm)

you get a better torque reading if each cylinder is brought up to TDC on its own. however with non-adjustable, I just zip them on with the electric burp gun.

Ithanks. s this Not adjustable right? As mention in the manual
What about the fact that they are now empty how to load them? I'm leaving in oil tank for long time now, then tomorrow i will put them in position.
Then shell i need some rotation to load oil inside or just switch on and wait some time for the oil to fully fill them?
Tks

 

[alldodge]

As we all know something is wrong. The adjustable rocker will have self locking rocker nuts and you will not be able to tighten them with your fingers.

 

[ste80]

In post 6 the pic shows some of the rocker nuts are not at about same position a the others, this is why I mentioned it

If not all had been torqued to 27nm then that also would be the reason

I'm wondering if some of the lifters are hanging up inside or on outside in the bores.


I wonder if you have a mix bag of parts?
How long are the push rods?

No now all lifter are out in oil tank. In the video i'm workin only on one lifter.
In the picture same, it was before to start to tight all i will make one picture after tight all at 27 nm but when i did the nuts look like same

 

[Lou C]

Alldodge good point on the self locking nuts. All of those should be replaced for the adjustment to hold.

 

[ste80]

As we all know something is wrong. The adjustable rocker will have self locking rocker nuts and you will not be able to tighten them with your fingers.

I bought this motor used and those are the bolt found inside. Do you think they are wrong? They are for sure not self locking . They have the not loosening part on botton (like washer) similar to the one in the picture
Is not right?

 

[ste80]

Alldodge good point on the self locking nuts. All of those should be replaced for the adjustment to hold.

didnt find any just 12 of this bolt found. But this is the only place where they could go

 

[alldodge]

Those are torque to spec, there not self locking

 

[ste80]

Online i can see this not like mine

 

[alldodge]

Yes that is a self locking type
Check the length of the push rods

 

[ste80]

Those are torque to spec, there not self locking

Yes, so still not clear if mine will go 27 nm (so this bolt could be ok) or 0 lash + 3/4 so this bolt for sure are not ok

 

[alldodge]

With the nuts you have it's torque to 27 and your done

 

[Lou C]

with the old style adjustable you have to do the zero lash and either 3/4ths or 1 turn depending on whose spec you are using.

 

[ste80]

With the nuts you have it's torque to 27 and your done

Thanks this make me happy

 

[ste80]

with the old style adjustable you have to do the zero lash and either 3/4ths or 1 turn depending on whose spec you are using.

After i sow previous msg i was happy, now i'm confused again .
I will try to ask also old owner if this was the bolt that was on. But for sure if this were the bolt 0 lash +3/4 will not be safe at all

 

[Lou C]

If the way I am saying to adjust them does not work, then the only conclusion that I can come to here is that you have either the wrong pushrods, or wrong hydraulic valve lifters for the engine and cylinder heads that you have. That's the adjustable valve train, it should be as I'm saying not torque to 27 and done.

 

[Lou C]

 

[Lou C]

This is right from my OMC shop manual and remember it’s a GM engine whether it’s Merc OMC or Volvo. For your adjustable valve train this is how it’s done and if it doesn’t seem right either the pushrods or lifters are wrong for the engine or something’s wrong with the lifters…and DON’T forget those nuts you have a wrong for the engine you need self locking rocker arm retaining nuts.
I did it exactly this way 8 years ago it’s still running fine.