I want to check the rocker arms on my xflow (1360 cc Vulcan specs) for wear and correct valve clearance.
Therefore i have to remove the rocker shaft assembly. Is there a special procedure e.g. positioning the camshaft ? I think there are always some valve springs under tension.

[Edited on 27/8/13 by strikerguy]

Nothing special needed just don't disturb the pushrods and the cam will open the valves same after it's replaced.

[Edited on 27/8/13 by Peteff]

Since you appear to be a complete novice from your question do what us complete novices did long before they invented the internet, get a good manual. It will be your friend for many years.

It will contain all the correct torque settings, you will need these when you refit the rocker shaft.

Sorry for asking ! Because i am not a complete novice i do own a Haynes owners workshop manual for the Ford Escort 75 to 80 models ! So, the torque for the rocker shaft bolts is 24 to 30 nm.
On page 31 it says how to remove the rocker shaft, but i was just wondering about the tension caused by the valves being open at the moment you losen the bolts.

its not that much tension really, it won't fly across the room or anything


its been a while since I did one of these (last one was on my mk1 fiesta) if the manual gives you an order to tighten the bolts - then use the opposite order to loosen them a little at a time (just like a cylinder head)


if the manual doesn't say just loosen/tighten each bolt a little at a time and it'll be fine
(I'd just treat it a bit like a generic cylinder head for the order - loosen fro the outside in, tighten from the middle out...)

quote:

---

Originally posted by mcerd1
its not that much tension really, it won't fly across the room or anything


its been a while since I did one of these (last one was on my mk1 fiesta) if the manual gives you an order to tighten the bolts - then use the opposite order to loosen them a little at a time (just like a cylinder head)


if the manual doesn't say just loosen/tighten each bolt a little at a time and it'll be fine
(I'd just treat it a bit like a generic cylinder head for the order - loosen fro the outside in, tighten from the middle out...)

---

just wip the bolts out, do the same as taking a head off, undo one of the outside bolts abit then the opposite bolt then a middle bolt.....

same for putting it back on, you wont be effecting timing by removing the rockers so no worries about the cam!

have fun,

Undo the rockers bolts as evenly as possible (i.e. a turn or so on each at a time) and you will have no problems. The open valves will become closed before you have run out of thread on the studs.

So, that was easy ! No bits flying through the garage...

I have three rocker arms showing a clearly visible and feelable indentation on the spot the valve stem hits the rocker arm. Enough to give a false reading with the standard feeler gauges i used.
Is there a method to flatten the arms without ruining the curved surface ?
I am more of an angle grinder type of guy, but for some reason i think that's not the correct tool for this job

Buy a new old set from fleabay.. there pennies. If your having probs im sure everyone on here including me have a set in the shed!

There used to be a tool sold for adjusting rockers.
I just cannot remember its name (I even have on in the garage - somewhere)

It 'clicked' as it was turned and the number of 'clicks' related to a valve clearance.
Different number of clicks for different engines/clearances as the thread used on a
variety of engines have different pitches on the adjusting stud/nut.

Not a perfect clearance as the values where rarely exact, but the tolerances gave room for manoeuvre.

This tool was excellent for 'worn' engines as you started from a zero clearance and
just set to the desired clicks and locked it off with the nut.
This overcame the exact problem you have described with worn rockers.

The only way to refurb yours is to build up the lost metal and re-harden.

OR

Get new rockers as described.

quote:

---

Originally posted by strikerguy
I have three rocker arms showing a clearly visible and feelable indentation on the spot the valve stem hits the rocker arm. Enough to give a false reading with the standard feeler gauges i used.
Is there a method to flatten the arms without ruining the curved surface

---

best just to get replacements if you can, it'll save a lot of hassle


or you could always upgrade to roller rockers (but thats not a cheap option )

[Edited on 28/8/2013 by mcerd1]

quote:

---

Originally posted by mcerd1
best just to get replacements if you can, it'll save a lot of hassle


or you could always upgrade to roller rockers (but thats not a cheap option )

[Edited on 28/8/2013 by mcerd1]

---

what do you think it would cost to post it to you from the UK ?

quote:

---

Originally posted by mcerd1
what do you think it would cost to post it to you from the UK ?

---