Piston has been crushed. You need a new piston.
The 1st tooth is getting pushed in towards the spring, rather than been pulled back. The swiss cheese job has caused the fault.
Brilliant spot sir, the white lines on that far right swiss hole indicate the failure
I don't like this SHS piston TT0030 - never have & never will, not enough rails for me
I'm not a great fan of the big hole swiss TT0093 is better but I'd only use say in G&G's
(shs don't bind in G&G's like most others)
I've only swissed a few at that point between rails & rack and tbh the weight gain is f*ck all in the end
in this case 7 or 8 x say 4.5mm holes each side makes little difference to weight in the end under rails
plus I had my reservations about this area
If a reg blue steel rack SHS fits - use that
If not and it binds either make it fit if binding is slight
Or
Use the Cyma piston that pete AK2M4 has started stocking for a tenner with OK POM head
(lose that f*cking heavy alloy weight ffs to save 6gms or so)
A reg std SHS blue full rack is 15.7gms
if you can be ar$ed mild swiss on top only will save you say 15% weight and just go with that
you might get only 10% if very mild swiss on top
you could get 20% saving if going nutz but honestly it is not a great deal to save for messing about
(most of the time is finishing off the holes cleanly etc....)
Even filing off say unused 8 teeth on a DSG I did today wasn't really worth the agro
the full rack weighed 6.75gms, by the time I removed the unused 8 teeth and lowered the 3rd tooth
(2nd tooth already removed btw)
By the end of dremel & filing away them unused teeth it went from 6.75gms to 5.84gms
(ffs thought I'd save a bit more that that)
It was a heavy acm full rack piston with full complete rails which was nearly 19gms
after going full on nutz I got it down to 14gms
this piston doesn't bind where as the shs does - hence me f*cking about with it trying to lose a bit of weight
The shs binds a bit but at 15.7gms with a mild swiss it would have been same if not lighter if I had made it fit
I knew swissing was time consuming, but learnt a bit recently that the savings are quite minimal
just drop alloy spacer/bearing and you would be hard pushed to save 4 or 5gms from swissing
quite shocked how little was saved from grinding off 8 unused teeth on the DSG rack though
If you are bored, then yeah maybe swiss a shs blue steel rack piston - but it isn't all it is "cracked up" to be
plus the risk of f*cking it all up too....
There is a vid on this bloke doing all the testing bollox which was a bit interesting
he f*cked some up and tried all different patterns and what not....
), do you have another piston to try?
