maybe that's where the misunderstanding is Eric. The trouble was with no:3 & no:6 pistons. Not 3 & 4. I can understand the middle piston from what you are saying. If you hadn't of pointed that out, I would be none the wiser. But due to one of the end pistons suffering? It's too far from mixer to be the culprit.

Anyway, I'm on the right track & I owe it to you guys for your suggestions & quick clueing up. THANKS!

__________________

um.....why have men got nipples