play in rocker arm (video)

astradaryl · Aug 4, 2011

hi all i noticed a bit of excess side to side movement in the exhaust rocker when i was doing my valve adjustment i start by showing you the exhaust rocker then go on to show you the inlet movement and as you can see it is less.

is this normal ???

thanks for your time dazza..

[youtube:1jzn4jg3]http://www.youtube.com/watch?v=EV2foJy4zpg[/youtube:1jzn4jg3]

GregUK · Aug 4, 2011

Is the end-float the same when the engine is hot?

What does the manual say the end-float should be?

Greg

astradaryl · Aug 4, 2011

i havent checked when hot.
i will have a look in the manuel now.

thanks dazza.

zaga · Aug 4, 2011

Hi

I don't think that the manual says what is the axial play (only radial), but you have too much.
I usualy put it to 0,10mm max.

If anyone has the correct value would be good.

:cheers:
ZAGA

astradaryl · Aug 4, 2011

ok thanks mate what does this mean new bearings?

GregUK · Aug 4, 2011

astradaryl said:
ok thanks mate what does this mean new bearings?

Not yet.

What you have is a steel rocker forging with end-float on the rocker shaft. I have to admit that it looks a little excessive but you should consider that the expansion rates of the steel components will differ from the alloy casings that they all sit in.

Before doing anything, you really MUST find out what the cold end-float should be. If it turns out that you have too much end-float, I would adjust by fitting engineered brass shims (ie washers) of appropriate thickness. The shims need to be arranged so the the centre of the rocker is over the centre of the valve stem.

Greg

ned37 · Aug 4, 2011

If it turns out that you have too much end-float, I would adjust by fitting engineered brass shims (ie washers) of appropriate thickness.

from the service manual: [attachment=0:33yw5fyz]Doc1.doc[/attachment:33yw5fyz]

zaga · Aug 4, 2011

I knew it was writen somewere but didn't remember were.

Thanks
ZAGA

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