Nissan MA12 service manual page with valve and valve guide speci…

SERVICE DATA AND SPECIFICATIONS (S.D.S.) VALVE Unli: mm tin) Inspection and Adjustment (Cont'd) T (Margin miakness) V Valve spring Free heigm mm (m) 46.70 (I .8336) Preasme neigm 215/5453 mm/N [mm/kg, in/lb) (235/555,),122/1216l Ammnled heigm SID/161.5 mm/N (mm/[<94 in/Ib) l37.o/ls.5. IAN/36.4] cm of muare "5" mm (in) 1a (0.079) Valve guide Ul'lll: mm (ml D a L SEMIEB Engine MA12 lmn Valve head diameter "D" lmaka 35 ll.3s) Exhaust :lalua) Valve lengm "L" I l k loam no.0 " ' 14.3071 4.3307) ~ .5 Exhausx In 09 Valve mm diamuar "d" lnuke Exhiu Valve seai angle "a" lnlaku Exhausl valve margin "T" leil VaIvI sum and 5mm grinding limit VnIv- cIur-nce Imakl Exhausx [4.2574 - A31 I0) 6.970 - 6.985(01744 A 0.2750) 6.95 - 6.960 (0.2734 ~ 0.27!) 4515~4545' 0.5 ((1020) 0.2 (0.003) IHDII [Gold] 0.25 10.0098) 'O.IB (0.007} 0.30 (0.0113) 0.25 (0.010! Slandmd SINlce ' AK :mblam mmpemure 20C (58'FI. Aim checking valve clur-nce while engine i cold, also check u when angina IS hm u: see il it remains wllhln me mlcmed vnlue. If n dues nm, reading it. Valve quid: H.023 ~ H.034 (0.43411 - 01344) On Ker dlamunr Valve guide Inner diemexer [FlnlshEo mu! cvlineer rind vaive guldl hole diamalav Inmreunce fix of valve 10.960 ~ 1978 (c.43I5 - 0.4312) H.223 . H.234 (0.4418 . 004423) 7.005 ~ 7.020 (02758 ~ 0.2764) lmsoanm (Quad-0.440!) 0.045 -0.074 (0.0013 - 0.0029) QuIdO Standard Max. rolaranca sum to qulde mearance [mm unis-0.045 (c.0005 - 0.0013) 11.1 (0004) Ex" 0.045 - 0,075 w" (0.0015 - b.0030) Valve deflecnun mm 0.2 (0.005)