Piston Ring Gap
-
Mad Mart
- TDC Member
- Posts: 8532
- Joined: Tue Oct 03, 2006 5:48 pm
- Location: Winscombe, North Somerset, England
- Contact:
Piston Ring Gap
What should the piston ring gap be on the top & second rings on a Sprint? I'm looking in the 'operations repair manual' and I can see the diagram but it says "refer to data". I've looked at the data but I can't see anything related.
Sprintless for the first time in 35+ years. 
... Still Sprintless.
Engines, Gearboxes, Overdrives etc. rebuilt. PM me.
2012 Porsche Boxster 981 S
... Still Sprintless.Engines, Gearboxes, Overdrives etc. rebuilt. PM me.
2012 Porsche Boxster 981 S
-
MIG Wielder
- TDC Member
- Posts: 2336
- Joined: Sun Mar 16, 2008 2:52 pm
Re: Piston Ring Gap
Hi Mart, I have the AKM3629 manual dated 1977 and the Data is squirreled away on Page 12-5
But to answer your question ...
The Top compression ring gap is given as 0.0138 to 0.0217 in
The Scraper ring gap is given as 0.0138 to 0.0217 in ( the same )
Oil control chrome rail is given as 0.015 to 0.055 in
Oil control expander rail gap is "Ends to butt"
Let me know if you would like a scan of these pages.
HTH,
Tony.
But to answer your question ...
The Top compression ring gap is given as 0.0138 to 0.0217 in
The Scraper ring gap is given as 0.0138 to 0.0217 in ( the same )
Oil control chrome rail is given as 0.015 to 0.055 in
Oil control expander rail gap is "Ends to butt"
Let me know if you would like a scan of these pages.
HTH,
Tony.
Re: Piston Ring Gap
The best is to have the second ring slightly wider gap as the top ring.
Jeroen.
Jeroen.
Classic Kabelboom Company. For all your wiring needs. http://www.classickabelboomcompany.com
-
Mad Mart
- TDC Member
- Posts: 8532
- Joined: Tue Oct 03, 2006 5:48 pm
- Location: Winscombe, North Somerset, England
- Contact:
Re: Piston Ring Gap
Thanks Tony/Jeroen.
I had found those figures (even in the Haynes manual on page 49) but wasn't sure that the "fitted gap" was what I was looking for. I thought they were referring to the tolerance in the piston groove height.
I had found those figures (even in the Haynes manual on page 49) but wasn't sure that the "fitted gap" was what I was looking for. I thought they were referring to the tolerance in the piston groove height.
Sprintless for the first time in 35+ years. ... Still Sprintless.
Engines, Gearboxes, Overdrives etc. rebuilt. PM me.
2012 Porsche Boxster 981 S
... Still Sprintless.Engines, Gearboxes, Overdrives etc. rebuilt. PM me.
2012 Porsche Boxster 981 S