Author Topic: 850-T3 Ring end gap.  (Read 408 times)

Online n3303j

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850-T3 Ring end gap.
« on: May 09, 2025, 01:16:23 PM »
So it's raining and I'm in my garage looking up ring end gap specs for the T3.

Guzziology sends me to the shop manual.

The shop manual shows:

0.3÷0.45 for top three rings

0.25÷0.40 for the oil ring

WTF???

Google doesn't even know what to make of that notation.

Anyone versed in the old European languages who can translate?

Thanks
'98 MG V11 EV
'96 URAL SPORTSMAN
'77 MG 850T3 FB

Online RinkRat II

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Re: 850-T3 Ring end gap.
« Reply #1 on: May 09, 2025, 01:25:17 PM »

Rule of thumb    3"Bore   .012"  top ring  all others .010"
                         3.5Bore  .014  top       All Others  .012"
                          4.0 Bore  .016" top all others  .014

      Hope this helps.
      Paul B  :boozing:
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Offline Antietam Classic Cycle

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Re: 850-T3 Ring end gap.
« Reply #2 on: May 09, 2025, 01:41:34 PM »
0.3÷0.45 for top three rings

0.25÷0.40 for the oil ring

.30 mm = .012", .45 mm = .018" so top three ring end gap .012" - .018"
.25 mm = .010", .40 mm = .016" so oil ring end gap .010" - .016"
Charlie

Offline guzzisteve

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Re: 850-T3 Ring end gap.
« Reply #3 on: May 09, 2025, 01:44:01 PM »
Yes, but it's Nik so I looked in LM3 supplement 850cc top rings.30-.45 metric  oil ring .25-.40 metric

WOW, same as Charlie posted, kit should have had specs when supplied
« Last Edit: May 09, 2025, 01:46:18 PM by guzzisteve »
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Online n3303j

  • Ron Cichowski
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Re: 850-T3 Ring end gap.
« Reply #4 on: May 09, 2025, 01:47:19 PM »
So the confusion on my part was not realizing the draftsman used the division symbol to indicate he was specifying a range between the two numbers. The numbers were straight end gap in millimeters.
'98 MG V11 EV
'96 URAL SPORTSMAN
'77 MG 850T3 FB

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