2001 SUZUKI GRAND VITARA ig meter

6A2-18 ENGINE MECHANICAL (H27 ENGINE)
INSPECTION
Valve guides
Using a micrometer and bore gauge, take diameter readings on
valve stems and guides to check stem-to-guide clearance. Be
sure to take reading at more than one place along the length of
each stem and guide.
If clearance exceeds limit, replace valve and valve guide.
Valve stem-to-guide clearance :
INSTALLATION
1) Clean mating surface on cylinder head and cylinder block.
Remove oil, old gasket and dust from mating surface.
2) Install knock pin (4) to cylinder block.
3) Apply sealant “A” to cylinder head gasket (1) as shown in the
figure.
“A” : Sealant 99000-31150
Sealant amount (Width “w”) :
4 mm (0.158 in.)
4) Install new cylinder head gasket (1) to cylinder block as
shown in the figure. carved lot number (5) on cylinder head
gasket (1) should face up (toward cylinder head side).Standard Limit
Valve stem
diameterIntake 5.965 – 5.980 mm
(0.2348 – 0.2354 in.)–
Exhaust 5.940 – 5.955 mm
(0.2339 – 0.2344 in.)–
Valve guide
I.D.In & Ex 5.985 – 6.010 mm
(0.2356 – 0.2366 in.)–
Stem-to-guide
clearanceIntake 0.035 – 0.045 mm)
(0.0014 – 0.0018 in.)0.07 mm
(0.0027 in.)
Exhaust 0.060 – 0.070 mm
(0.0024 – 0.0028 in.)0.09 mm
(0.0035 in.)
[A] : RH ( No.2) bank
[B] : LH (No.1) bank
2. Crankshaft pulley side
3. Flywheel side

6A2-22 ENGINE MECHANICAL (H27 ENGINE)
INSPECTION
Cylinders
•Inspect cylinder walls for scratches, roughness, or ridges
which indicate excessive wear. If cylinder bore is very rough
or deeply scratched, or ridged, rebore cylinder and use over
size piston.
•Using a cylinder gauge, measure cylinder bore in thrust and
axial directions at 2 positions (1, 2) as shown in the figure.
If any of the following conditions is noted, rebore cylinder.
–Cylinder bore dia. exceeds limit.
–Difference of measurements at 2 positions exceeds taper
limit.
–Difference between thrust and axial measurements
exceeds out-of-round limit.
Cylinder bore dia. limit :
88.050 mm (3.4665 in.)
Taper and out-of-round limit :
0.10 mm (0.004 in.)
Pistons
•Inspect piston for faults, cracks or other damages.
Damaged or faulty piston should be replaced.
•Piston diameter :
As shown in the figure, piston diameter should be measured
at a position 26.5 mm (1.04 in.) (1) from piston skirt end in
the direction perpendicular to piston pin.
Piston diameter : NOTE:
If any one of six cylinders has to be rebored, rebore all
six to the same next oversize. This is necessary for the
sake of uniformity and balance.
1. 50 mm (1.96 in.)
2. 95 mm (3.74 in.)
Standard87.970 – 87.990 mm
(3.4634 – 3.4642 in.)
Oversize :
0.50 mm (0.0196 in.)88.470 – 88.490 mm
(3.4831 – 3.4839 in.)

ENGINE MECHANICAL (H27 ENGINE) 6A2-23
•Piston clearance :
Measure cylinder bore diameter and piston diameter to find
their difference which is piston clearance. Piston clearance
should be within specification as given below. If it is out of
specification, rebore cylinder and use oversize piston.
Piston clearance :
0.02 – 0.04 mm (0.0008 – 0.0015 in.)
•Ring groove clearance :
Before checking, piston grooves must be clean, dry and free
of carbon.
Fit new piston ring (1) into piston groove, and measure clear-
ance between ring and ring land by using thickness gauge
(2). If clearance is out of specification, replace piston.
Ring groove clearance :
Top : 0.03 – 0.07 mm (0.0012 – 0.0027 in.)
2nd : 0.02 – 0.06 mm (0.0008 – 0.0023 in.) NOTE:
Cylinder bore diameters used here are measured in
thrust direction at 2 positions.
1. 26.5 mm (1.04 in.)

6A2-24 ENGINE MECHANICAL (H27 ENGINE)
ASSEMBLY
1) 2 sizes of piston are available as standard size spare part so
as to ensure proper piston-to-cylinder clearance. When
installing a standard size piston, make sure to match piston
with cylinder as follows.
a) Each piston has stamped number (1 or 2) on its piston
head. It represents outer diameter of piston.
b) There are also stamped numbers of 1 and 2 on the cylinder
block as shown in the figure.
c) Stamped number on piston and cylinder block must corre-
spond. That is, install number “2” stamped piston to cylinder
which is stamped also number “2” and a number “1” piston
to cylinder with number “1”.
Also, a letter A, B or C is stamped on piston head but ordi-
narily it is not necessary to distinguish each piston by this
letter.
Piston-to-cylinder clearance
Piston :
Cylinder :
Piston-to-cylinder clearance :
0.02 – 0.04 mm (0.0008 – 0.0015 in.)
2) Install piston pin to piston and connecting rod :
After applying engine oil to piston pin and piston pin holes in
piston and connecting rod, fit connecting rod to piston as
shown in the figure and insert piston pin to piston and con-
necting rod, and install piston pin circlips. Number at the top (mark) Outer diameter
187.98 – 87.99 mm
(3.4638 – 3.4642 in.)
287.97 – 87.98 mm
(3.4634 – 3.4638 in.)
Number on cylinder block (mark) Outer diameter
188.01 – 88.02 mm
(3.4650 – 3.4653 in.)
288.00 – 88.01 mm
(3.4646 – 3.4650 in.)
NOTE:
“86F” mark on connecting rod must face toward crank-
shaft pulley side.
1. Piston
2. Arrow mark
3. Connecting rod

ENGINE MECHANICAL (H27 ENGINE) 6A2-31
Main bearing clearance
Check clearance by using gaging plastic (1) according to the fol-
lowing procedure.
1) Remove crankcase.
2) Clean bearings and main journals.
3) Place a piece of gaging plastic to full width of bearing (paral-
lel to crankshaft) on journal, avoiding oil hole.
4) Install crankcase to cylinder block.
Tighten crankcase bolts, following sequence in the figure.
Tighten crankcase bolts to specified torque.
Tightening torque
Thrust and journal bearing cap bolt (8 mm thread diame-
ter) (a) :
60 N·m (6.0 kg-m, 43.5 lb-ft)
Thrust and journal bearing cap bolt (10 mm thread diame-
ter) (b) :
27 N·m (2.7 kg-m, 19.5 lb-ft)
5) Remove crankcase and using scale (2) on gaging plastic (1)
envelop, measure gaging plastic (1) width at its widest point.
If clearance exceeds its limit, replace bearing. Always
replace both upper and lower inserts as a unit.
A new standard bearing may produce proper clearance. If
not, it will be necessary to regrind crankshaft journal for use
of 0.25 mm undersize bearing.
After selecting new bearing, recheck clearance.
Main Bearing Clearance
Standard : 0.024 – 0.044 mm (0.0009 – 0.0017 in.)
Limit : 0.060 mm (0.0023 in.)
NOTE:
Tighten 10 mm thread diameter bolts first (following the
order shown in the figure) then tighten 8 mm thread
diameter bolts.
NOTE:
Do not rotate crankshaft while gaging plastic is installed.
1. Lower crankcase
2. Bolt (10 mm thread diameter)
3. Bolt (8 mm thread diameter)
4. Long bolt (8 mm thread diameter)

6A2-32 ENGINE MECHANICAL (H27 ENGINE)
Selection of main bearings
•STANDARD BEARING :
If bearing is in malcondition, or bearing clearance is out of
specification, select a new standard bearing according to the
following procedure and install it.
1) First check journal diameter. As shown in the figure, crank
web has stamped numbers and alphabet at the center.
3 kinds of numbers (“1”, “2” and “3”) represent the following
journal diameters.
Journal diameter :
2) Next, check crankcase (bearing cap) bore diameter without
bearing. On lower surface of lower crankcase 4 alphabets
are stamped as shown in the figure.
3 kinds of alphabets (A, B and C) represent the following cap
bore diameters.
Main bearing cap bore diameter :Stamped numbers Journal diameter
165.000 – 65.006 mm
(2.5590 – 2.5593 in.)
264.994 – 65.000 mm
(2.5588 – 2.5590 in.)
364.988 – 64.994 mm
(2.5586 – 2.5588 in.)
1. Crankshaft
2. Crank web
Stamped numbersBearing cap bore diameter
(without bearing)
A70.000 – 70.006 mm
(2.7559 – 2.7561 in.)
B70.006 – 70.012 mm
(2.7561 – 2.7563 in.)
C70.012 – 70.018 mm
(2.7563 – 2.7566 in.)
1. Crankshaft pulley side
2. Stamped alphabets
3. No.1 bearing
4. No.2 bearing
5. No.3 bearing
6. No.4 bearing

ENGINE MECHANICAL (H27 ENGINE) 6A2-33
3) There are 5 kinds of standard bearings differing in thickness.
To distinguish them, they are painted in following colors at
the position as shown in the figure.
Each color indicates the following thickness at the center of
bearing.
Standard size Main bearing thickness :
4) From number stamped on crank webs at its center and
alphabets stamped on crankcase lower side, determine new
standard bearing to be installed to journal, by referring to
table shown below.
For example, if number stamped on crank webs is “1” and
alphabet stamped on crankcase is “B”, install a new standard
bearing painted in “Black” to its journal.
New standard size bearing specification :
5) Using gaging plastic, check bearing clearance with newly
selected standard bearing.
If clearance still exceeds its limit, use next thicker bearing
and recheck clearance.
6) When replacing crankshaft or cylinder block and crank case
due to any reason, select new standard bearings to be
installed by referring to number stamped on new crankshaft
or alphabets stamped on new crankcase lower side.Color painted Bearing thickness
Black2.496 – 2.500 mm
(0.0983 – 0.0984 in.)
Colorless (no paint)2.499 – 2.503 mm
(0.0984 – 0.0985 in.)
Yellow2.502 – 2.506 mm
(0.0985 – 0.0986 in.)
Blue2.505 – 2.509 mm
(0.0986 – 0.0987 in.)
Pink2.508 – 2.512 mm
(0.0987 – 0.0988 in.)
1. Paint
Number stamped on crank web
(Journal diameter)
123
Alphabet stamped
on lower crankcase
(Cap bore dia.)A Black Colorless Yellow
B Colorless Yellow Blue
C Yellow Blue Pink

6A2-34 ENGINE MECHANICAL (H27 ENGINE)
•UNDERSIZE BEARING (0.25 mm) :
0.25 mm undersize bearing is available, in 5 kinds varying in
thickness.
To distinguish them, each bearing is painted in the following
colors at such position as shown in the figure.
Each color represents the following thickness at the center of
bearing.
Under size main bearing thickness
•If necessary, regrind crankshaft journal and select undersize
bearing to use with it as follows.
1) Regrind journal to the following finished diameter.
Finished journal diameter :
64.738 – 64.756 mm (2.5487 – 2.5494 in.)
2) Using micrometer, measure reground journal diameter.
Measurement should be taken in 2 directions perpendicular
to each other in order to check for out-of-round.
3) Using journal diameter measured above and alphabets
stamped on lower crankcase, select an undersize bearing by
referring to table given below.
Check bearing clearance with newly selected undersize
bearing.
Under size bearing specification :Color painted Bearing thickness
Black & Red2.621 – 2.625 mm
(0.1032 – 0.1033 in.)
Red2.624 – 2.628 mm
(0.1033 – 0.1034 in.)
Red & Yellow2.627 – 2.631 mm
(0.1034 – 0.1035 in.)
Red & Blue2.630 – 2.634 mm
(0.1035 – 0.1036 in.)
Red & Pink2.633 – 2.637 mm
(0.1036 – 0.1037 in.)
1. Paint
Measured journal diameter
64.750 – 64.756 mm
(2.5492 – 2.5494 in.)64.744 – 64.750 mm
(2.5489 – 2.5492 in.)64.738 – 64.744 mm
(2.5487– 2.5489 in.)
Alphabets stamped on
lower crankcaseA Black & Red Red Red & Yellow
B Red Red & Yellow Red & Blue
C Red & Yellow Red & Blue Red & Pink