gold or black top mounts?
the gold ones had a fault with them, some of them still knocked.
do you know how to check for play in balljoints/ top mounts?
What suspension are you running?
My knocking came from play in the damper pistons.
When is it knockong? going over bumps?
jack the front wheels up, hold the wheels at 3 an 9 o clock positions and wobble to feel for play, if there is then thats balljoints. same again but at 6 and 12 positions, and if theres play thatl be top mounts
I had a knocking noise on mine, when i put my new wishbones on one of my balljoins was gone so could be that?
Are the balljoints 10 or 12mm bolts and holes??
For some reason they offer two options on the 172, the 10mm will knock their tits off due to being to small for the holes, the 12's will be just fine.
Easy thing to check, get it done.
Standard mate, I was thinking it could be fucked shocks but changing those is a last resort.
Standard Front shocks are only £50 a side brand new. Cheap as chips.
I have a knocking noise like you say, replaced the ball joint and was still there. Top mounts seem fine, so ive put it down to the damper. Which will be refurbed this month anyway.