|
|
|
#1
|
|||
|
|||
300SDL cylinder head number
I hear a lot of talk about the cylinder heads being better or worse depending on the head number. What is this How do i locate the number on a 603 motor.
|
#2
|
|||
|
|||
the number is casted on the head on the side where intake manifold mounts. you will see the number very close to where the valve cover attaches. I know theres pictures on here somewhere.
btw i have a #14 head which hasnt given me any trouble while it has given others trouble.
__________________
1986 300SDL, 211K,Dealership serviced its whole life 1991 190E 2.6(120k) 1983 300D(300k) 1977 300D(211k) |
#3
|
||||
|
||||
Which set of digits is the number of interest? 603 xxx yy zz or something like that, it's been a while since I looked... which of those is the head number?
|
#4
|
|||
|
|||
a forum member posted pictures.
If i remember right its the middle 2 digits but i might be wrong
__________________
1986 300SDL, 211K,Dealership serviced its whole life 1991 190E 2.6(120k) 1983 300D(300k) 1977 300D(211k) |
#5
|
|||
|
|||
Its yy in your example. Between 14 and 22, >14 is good. Search on cracked head for many threads on the reasons why.
__________________
87 Mercedes 300TD, 81 300D, 95 Dodge Cummins 4x4 |
#6
|
|||
|
|||
At I believe the second intake port on the head, there are numbers that indicate production. The #14, was the earliest in production, also the one usually prone to crack. Later versions, 15, 16, 17, were redesigned, and the last of witch in production, number 20, or 21, also proved good. I think only about 20% of the #14 head showed problems, this based on my research from several years ago. Yes, some 603's suffered cracked heads, but not all. It warrants checking if looking at an early 603, with a #14 cast head.
|
#7
|
||||
|
||||
Agreed. I've removed the #14 heads from two >200,00mile cars and found no cracks, my current driver exhibits no signs of running with a cracked head either, neglect or abuse tends to be a common cause.
__________________
Gone to the dark side - Jeff |
Bookmarks |
Thread Tools | |
Display Modes | |
|
|