I have an 2007 sonata with a 3.3. Water got sucked into engine and bent a connecting rod, and the crank scratched the piston. Hyundia lists 3 different pistons- std a, std b, and std c and 5 different rod bearings a, b, c, d, and e all std. A Hyudnai tec told me theres a series of letters behind the crank pulley that indicates which piston for which cylinder. I pulled the crank pulley and there are no letters behind the pulley. Today im going to pull the piston out and see if theres any numbers or letters on it. Any help would be much appreciated.

 

Connecting Rod Mark Location

Discrimination Of Connecting Rod
Class
Mark
Inside Diameter
0
a
58.000 ~ 58.006mm
(2.2834 ~ 2.2837in.)
1
b
58.006 ~ 58.012mm
(2.2837 ~ 2.2839in.)
2
c
58.012 ~ 58.018mm
(2.2839 ~ 2.2842in.)


Crankshaft Pin Mark Location

Discrimination Of Crankshaft
Class
Mark
Outside Diameter Of Pin
I
A
54.966 ~ 54.972mm
(2.1640 ~ 2.1642in.)
II
B
54.960 ~ 54.966mm
(2.1638 ~ 2.1640in.)
III
C
54.954 ~ 54.960mm
(2.1635 ~ 2.1638in.)


Place Of Identification Mark (Connecting Rod Bearing)

Discrimination Of Connecting Rod Bearing
Class
Mark
Thickness Of Bearing
E
Blue
1.514 ~ 1.517mm
(0.0596 ~ 0.0597in.)
D
Black
1.511 ~ 1.514mm
(0.0595 ~ 0.0596in.)
C
Brown
1.508 ~ 1.511mm
(0.0594 ~ 0.0595in.)
B
Green
1.505 ~ 1.508mm
(0.0593 ~ 0.0594in.)
A
Yellow
1.502 ~ 1.505mm
(0.0591 ~ 0.0593in)

(11)Selection

Connecting Rod Bearing
Connecting Rod Identification Mark
0(a)
1(b)
2(c)
Crankshaft Indentification Mark
Ⅰ(A)
A
(Yellow)
B
(Green)
C
(Brown)
Ⅱ(B)
B
(Green)
C
(Brown)
D
(Black)
Ⅲ(C)
C
(Brown)
D
(Black)
E
(Blue)


-----------------------------------------------------------------------

6.Check the cylinder bore size code on the cylinder block.


Class
Size code
Cylinder bore inner diameter
A
A
92.00~92.01mm
(3.6220 ~ 3.6224in.)
B
B
92.01~92.02mm
(3.6224 ~ 3.6228in.)
C
C
92.02~92.03mm
(3.6228 ~ 3.6232in.)

7.Check the piston size code on the piston top face.


Class
Size code
Piston outer diameter
A
A
91.97~91.98mm
(3.6209 ~ 3.6212in.)
B
B
91.98~91.99mm
(3.6212 ~ 3.6216in.)
C
C
91.99~92.00mm
(3.6216 ~ 3.6220in.)

8.Select the piston related to cylinder bore class.
Clearance : 0.02 ~ 0.04mm(0.0008 ~ 0.0016in.)