603 head identification help needed - PeachParts Mercedes-Benz Forum

Carson357 · #1 09-24-2008, 10:02 PM

i ordered a cylinder head, and was told it is a #18, not sure how they came to that conclusion since the casting number is not completely legible, is there any other sure way to determine if the head is a #18 or above? see pictures below.

MTUpower · #2 09-24-2008, 10:05 PM

looks like a 016 there.

Carson357 · #3 09-24-2008, 10:14 PM

sorry my picture is not center, what the image shows is 603-016-00-00 the zeros being the area that cannot be clearly deciphered

MTUpower · #4 09-24-2008, 10:32 PM

I believe the third set of numbers should be the casting numbers. Try shining a flash light on them from a very narrow angle in low light the remaining bits of the numbers may emerge. Other than that I do know if there are differences that are visible. Here is a #22 head. If you need more pics of it let me know. I no longer have the head however- BC does.

Carson357 · #5 09-24-2008, 10:59 PM

now that i have that picture, if someone has a #14 head i can compare, the injector angle may indicate something

#6 09-25-2008, 01:58 AM

Looks like a 16 to me.

Carson357 · #7 09-25-2008, 02:05 AM

Quote:

Originally Posted by ForcedInduction

Looks like a 16 to me.

what brings that conclusion?

#8 09-25-2008, 02:33 AM

The number "603 16" in the picture.

Carson357 · #9 09-25-2008, 02:41 AM

Quote:

Originally Posted by ForcedInduction

The number "603 16" in the picture.

it is not the 4th and 5th digits of the casting number that designates the casting series, but rather the 6th and 7th digits, the 016 you are seeing is not the specific portion of the casting number that specifies the series of the head. as an example as shown in the image above it is: 603-016-22-01, the 22 is the specific head series, where on mine the area where the series would be is not legible. hope i am not rambling

#10 09-25-2008, 03:44 AM

Ah, I see.

babymog · #11 09-25-2008, 10:15 AM

Two things that can indicate it is not a 14 head: From the photo, it appears that the chunk missing from the top edge of the head above the M in Mercedes is in the same position as the larger machined chunk missing from the 22 head photo. This indicates the same injector/prechamber angle as the 22, which is different than the 14.

You can also screw an injector in the head, and see if the head bolt will clear the injector. In the 14 head, you can remove the head bolts from the head, in the 22 head you cannot as the injector interferes.

Other than that, look at some of GXSR's photos of the head, you will see a difference in the oil journals between the #1 cylinder and the timing chain IIRC, not sure whether that is a 22 only or came earlier.

Carson357 · #12 09-26-2008, 03:50 PM

well the rest of the parts came today, and i screwed the injector in and the head bolt can be inserted and removed without interference, also mine looks like the old one below, specifically the area in red.

to be sure i am understanding the injector part right, is it that with the injectors in the bolts cannot be removed or that you cannot loosen or torque them with the head inplace?

babymog · #13 09-26-2008, 04:12 PM

On my 22 heads, I could loosen/tighten the head bolts between the injectors, but I could not slide the bolts up/out of the holes as they hit the injector body.

On my 14 heads, I could slide the bolts up and out of the holes without interference with the installed injectors.

Do they look like the same angle (fore-aft) or do the injectors seem to be tilted further forward on the "new" head?

babymog · #14 09-26-2008, 04:31 PM

In the first photo, 22 head, notice the interference between the head bolt and the injector. Typical of all bolts under the injectors.

Second photo, 22 head, different channel in the area between the timing chain and #1 cylinder.

Third photo, 14 head, notice the clear shot to the head bolts, they will slide up and out.

I don't know the prechamber angle on the 16 head, but I believe that it is the same as the 22. Also, I noticed that the numbers "603 016" are visible in your first photo, which might be why they think it's a 16 casting, but that is the number on all of the heads IIRC. On the later heads, the 60 of 603 is usually machined off.

No, the 22 head is not for sale.

Carson357 · #15 09-26-2008, 04:52 PM

Quote:

Originally Posted by babymog

In the first photo22 head, notice the interference between the head bolt and the injector. Typical of all bolts under the injectors.

Second photo, 22 head, different channel in the area between the timing chain and #1 cylinder.

Third photo, 14 head, notice the clear shot to the head bolts, they will slide up and out.

I don't know the prechamber angle on the 16 head, but I believe that it is the same as the 22. Also, I noticed that the numbers "603 016" are visible in your first photo, which might be why they think it's a 16 casting, but that is the number on all of the heads IIRC.

i can see the differences now, but they told me it is a #18 head, i wonder if the angles for the #18 is same as #22