Rocker end float.

[Den]

I adjusted the rocker end float at the weekend.
I even referred to the F.O.A.K advice.

One wee thing that I think should be pointed out.
After torquing-up the head nut and the three torx bolts .... CHECK THE CLEARANCE AGAIN.

After getting perfect clearance ( bolts nipped-up and bash with hammer) and tightening everything up , I done the tappets,...... perfect.

Covers-plugs-protectors back on, fired it up. Tappety noise from what sounded like exhaust side.

Feck ... I will look at it later.

Looked today. Couldnt hardly move the exhaust rocker.
I had been adjusting the tappets against an almost jammed rocker hence the clearance not being correct.
Adjusted end float again. Torqued-up. rocker tight as feck again.
Again. Left more clearance than I wanted this time. Torqued-up.... Perfect.

After that long winded explaination, all I wanted to say was .....

After you have tightened the head nut/torx bolts. Check the rocker moves freely.

 

[Bronco Billy]

Den you daft old numpty ......... you do the rocker shaft endfloat first before you do the valve clearances. Thats the idea. You get a better and more stable valve opening by reducing the amount of movement in the shaft...

 

[Stewart H]

Just did mine last week, its now the third time I have done the job and its getting quite comfortable now.

Stewart

 

[Den]

Den you daft old numpty ......... you do the rocker shaft endfloat first before you do the valve clearances. Thats the idea. You get a better and more stable valve opening by reducing the amount of movement in the shaft...

I DID do the shaft clearance before the tappets.
What I didn't do was check the free movement of the rocker shaft after setting the clearance.
When I did the tappets, the rocker shaft was so tight that when setting the gaps, the shaft was not going fully back, hence the large gap.

There must be a small step where the bush goes through the rocker shaft. When it was stiff, I could still get the feeler gauge between the shaft and carrier.

 

[Carl]

I've always found that the gap closes up when tightening the cylinder head nut.

 

[Bronco Billy]

I DID do the shaft clearance before the tappets.
What I didn't do was check the free movement of the rocker shaft after setting the clearance.
When I did the tappets, the rocker shaft was so tight that when setting the gaps, the shaft was not going fully back, hence the large gap.

There must be a small step where the bush goes through the rocker shaft. When it was stiff, I could still get the feeler gauge between the shaft and carrier.

Ahhhh ....... there you go then ....... *(said with a knowing grin and nod)


*Make note not to make same bolox up!

 

[Stewart H]

I've always found that the gap closes up when tightening the cylinder head nut.

+1 It takes a few goes.
Stewart

 

[cookie]

+1 It takes a few goes.
Stewart

+2. total PITA.

 

[Den]

Maybe this 'problem' should be added to The font of all knowledge article re end float adjustment.
It seems obvious to recheck the gaps, but unless you remember to 'waggle your rockers' some might be caught out as I was.
And I'm meant to know what I'm doing !!!

You live and learn I suppose.

 

[MattW]

+2. total PITA.

+3
The rocker end cap on my LH head is such a good fit on the rocker shafts that I can't get the required 'twist' in it to set both gaps at minimum. I have to compromise by setting the exhaust rocker float at minimum and the inlet ends up 0.15mm bigger.

I always wiggle my rockers before setting valve clearances - a good check that you're at TDC compression.

 

[rudiemoto]

put .10 in end float and nip up the remove .10 then recheck wid .05
then do valve clearances
never had a problem

 

[Supertech]

Did mine as it was surging 2-3 K rpm. I found slackening the bolts and half retightening them, moving the rocker carrier about with a small hammer worked best - with no movement of the clearence on the final torquing.

Did cock all for the surging though. Balancing the throttle bodies made the biggest difference as did new plugs.