Right, I'm just almost finished rebuilding my engine and have discovered that the rocker arm assembly has been messed with before, I think. In one of the arms/butterflies I found what I can only describe as a wrist pin, was actually smaller than all the others and also had no hole in the middle like the others. Now I don't know if its like that or if someone has messed with it before as it has been rebuilt before as the dreaded #4 got scratched. Funnily enough the problem with the assembly is the one over #4.

Heres some pics to get an idea, what I need is to be able to just find that one 'wrist pin' so I can complete the build, else I'll have to buy a whole new arm assembly, not good!

 

FYI

There is three rollers that make a set. One of the two small rollers has a spring loaded pin with a hole. The other small roller had a soild pin. This soild pin falls out where the pin with the hole does not fall out of the other.

When oil is sent to the soild pin, it slides out, pressing the center pin to slide and compress the pin with a hole to compress the spring. That locks al three rollers together, making them one.

So I think you have what you need, just look closely at the others.

 

ok then I'll have a look. I'm sure though I'm missing the pin with the hole as I only have the small one. the other pin in the pic is from another roller.

 

The light blue is the one with the hole in it (I guess)
The service manual suggest to replace them as a set, all 3 of them.
Most likely because they are manufactured as a set to make sure the pins slide into the next rocker (@ 6000 rpm or so) while having an oil tight fit.

 

The pin with a hole does not come out, so look closer at this set and all others.

 

thanks for the help guys, will check it out tomorrow.

much appreciated