But a 14 head is not a conviction. All of my 603s have or have had
14 heads. My original SDL was the best running of all and had over
400K on the 14 head. The last time this came up, the general
discussion was that if the 14 head survived this long, it would
probably live out its life. (Provided it is not overheated) all the
rest have 200 to 300 K on them. I have never had the head off a 60x
yet.
Look for signs of leaking head gasket and signs of a cracked head.
Wow, now that is the answer I was looking for! Thank you.
Sent from my iPhone
On Jul 30, 2011, at 8:16 PM, Peter Frederick <psf...@earthlink.net> wrote:
In the middle of the part number on the head is a two digit code --
the original is -14-. the first improved head is -17- and the best
version is the -22- one.
They crack through from the combustion chamber to the coolant and or
oil passages, causing the usual results -- overheating, coolant use,
etc.
The head gaskets also fail pretty often, between cylinders and from
cooling passages or oil return to the outside, resulting in leaks.
Worst failure is between the oil passage across the front of the
block -- failure here allows oil to enter the #1 cylinder under
pressure. If enough gets in there, the #1 rod gets bent.
All the bits from the -14- head will fit the -22-, with the proviso
that it may be necessary to machine the pre-chambers to clear the
bottom of the large hole in the heads. The correct ones, with
inclined injectors, are a bit shorter at the shoulder, and if they
don't fit correctly the pre-chamber will leak compression at the
upper seal, usually badly enough that the engine will not run.
Always use all new head bolts, they often fail when re-used, as I
discovered on my old 300D.
Peter
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