Table 2. Engine repair and Replacement Standards-Continued
Maufacturer's
Maximum
Maximum
dimensions and
Desired
allowable
tolerences in
allowable
clerance
inches
clearance
wear
Maximum
Minimum
Minimum
Maximum
Valve Guide-Continued.
Outside diameter -----------------------------
0.8765
0.8755
Stem hole diameter:
Intake ---------------------------------------
0.4985
0.0020
0.4990
--------
---------
Exhaust ------------------------------------
0.4985
0.4995
0.0020
---------
----------
Distance-cylinder head:
Contact face to top of guide:
Intake ---------------------------------
2.000
Exhaust -------------------------------
2.875
Valve, Intake:
8.3785
8.3995
Length -------------------------------------------
Stem diameter --------------------------------
0.4977
0.4969
Head diameter ---------------------------------
2.322
2.332
Seat angle ---------------------------------
45
----------
Stem clearance ---------------------------------
0.0015
---------
0.0021
--------
---------
--------
Valve, Exhaust:
7.274
7.295
Length -------------------------------------------
Stem diameter ---------------------------------
0.494
0.495
Head diameter ---------------------------------
2.045
2.055
Seat angle ---------------------------------
45
---------
Stem clearance ---------------------------------
0.0035
0.0055
---------
----------
0.002
---------
Inserts, Exhaust Valve:
Outside diameter ----------------------------
2.2535
2.2545
Counterbore diameter ----------------------
2.250
2.251
Valve springs:
Outside diameter-outer --------------------
1.8875
1.9075
Outside diameter-inner ----------------------
1.375
1.355
Wire gauge ---------------------------------
0.225
---------
Spring length valve closed - outer -----------
2.750
---------
Spring length valve closed - inner ----------
2.594
---------
Spring length valve open-outer --------
2.187
--------
Spring length valve open-inner --------
2.031
---------
Spring load valve closed-outer --------
85
lbs.
95
lbs.
--------
--------
8 lbs.
--------
Spring load valve closed-inner --------
-------
41
lbs.
49
lbs.
--------
Spring load valve open--outer --------
192
lbs.
--------
208
lbs.
---------
9 lbs.
---------
Spring load valve open-inner ---------
95
lbs.
-------
105
lbs.
---------
Sleeves:
Inside diameter---------------------------------
5.5645
5.5625
Pin hole diameter ----------------------
1.7498
1.7500
Ring groove diameter:
lst; 2d; 3d ---------------------------------
4.943
4.953
4th; 5th -------------------------------------
5.011
5.021
Ring groove width:
1st; 2d; 3d ---------------------------------
0.156
----------
4th ------------------------------------------
0.2505
0.2515
5th ------------------------------------------
0.189
0.188
Ring land diameter:
lst -------------------------------------------
5.523
5.519
2d -------------------------------------------
5.525
5.529
5.530
5.534
3d; 4th --------------------------------------
Piston Clearance:
.008 (two .004 feelers) 5-10 lb. pull.
AGO 8498A
15