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EMWynne · 04-20-2021, 02:30 AM

I have just had an e-mail from the Senior Product Manager at Mahle...he quoted the ring gaps for piston ring set 504 40 N0 for Boxster 2,5/2.7cc engines as,
Top ring-0,15...0,35mm....006"-.014"

2nd ring-0,60-0,80mm....024"-.032"

oil control-0,50-0,75mm...020"-.030"

a very wide 2nd ring gap but they are correct.

My rings are still out of spec. brand new.

04-20-2021, 02:30 AM	#9
EMWynne Registered User Join Date: Mar 2021 Location: Devon, England, UK. Posts: 20	Piston ring end gaps. I have just had an e-mail from the Senior Product Manager at Mahle...he quoted the ring gaps for piston ring set 504 40 N0 for Boxster 2,5/2.7cc engines as, Top ring-0,15...0,35mm....006"-.014" 2nd ring-0,60-0,80mm....024"-.032" oil control-0,50-0,75mm...020"-.030" a very wide 2nd ring gap but they are correct. My rings are still out of spec. brand new. Last edited by EMWynne; 04-20-2021 at 09:25 AM.