[Vwdiesel] Head gasket choice?

[Ralph Meyermann]

Make that more of .6mm
On Apr 16, 2015 6:10 PM, "Ralph Meyermann" <ralphmeyermann at gmail.com> wrote:

> And the new hybrid ko3 wasn't cheap either.
> On Apr 16, 2015 6:08 PM, "Ralph Meyermann" <ralphmeyermann at gmail.com>
> wrote:
>
>> I have new 1mm oversized kolbenschmidt pistons bottom end is fully
>> assembled, I  measured with a digital caliper on #1 cylinder parallel with
>> wristpins to  eliminate piston rock. Kind of lacking some precision tools
>> due to cost of parts including new nearly complete kolbenschmidt head.
>> On Apr 16, 2015 5:59 PM, "Andrew .Libby" <libbybapa at gmail.com> wrote:
>>
>>> Have you accurately measured the piston protrusion at TDC for all 4
>>> pistons?  In order to do so you must clean all carbon or foreign matter off
>>> piston crown and engine deck. You then take the largest protrusion reading
>>> and use the appropriate head gasket that matches that protrusion.  If you
>>> are accurately measuring 0.5mm as the highest piston I would be a little
>>> concerned as that is less protrusion than fits even the skinniest 1-notch
>>> gasket which calls for 0.66-0.86mm (2 notch = 0.87-0.90 and 3 notch =
>>> 0.91-1.02).  The given spec readings make me wonder what you are supposed
>>> to use if the protrusion is o.865mm or 0.905mm.  :-)
>>>
>>> I have found that the wristpin is moved toward the crown typically
>>> 0.010" per oversize in order to accommodate machining the engine block head
>>> gasket surface.  Did you fit new pistons without having the headgasket
>>> surface skimmed?
>>>
>>> If your tallest piston protrusion is 0.5mm is there any chance the rods
>>> are bent?
>>>
>>> The 1-notch gasket seems to be particularly hard to come by.  It is part
>>> # 028103383BH (2-notch is suffic BJ and 3-notch is BK).  Looks like you
>>> have the correct part although I'd probably disassemble the bottom end and
>>> have a little skimmed off the block.  For future reference or anyone else
>>> who is reading, if I am replacing the pistons, I measure the protrusion of
>>> the old pistons, measure the wrist pin to crown height on both old and new
>>> pistons and then do the math so that I can tell the machinist exactly how
>>> much to skim off the head gasket surface without multiple trips to the
>>> machine shop or multiple times assembling/disassembling the bottom end.  I
>>> have done so on several engines and the piston protrusion has been exactly
>>> where I wanted it each time.
>>>
>>>
>>>
>>> On Thu, Apr 16, 2015 at 3:28 PM, Ralph Meyermann <
>>> ralphmeyermann at gmail.com> wrote:
>>>
>>>> Hi Volks! Currently assembling my AAZ and my pistons seem so come .5mm
>>>> out
>>>> of the hole. I bought a factory head gasket from my local vw
>>>> dealership. It
>>>> is a 028 103 383 BH DE. Is this thick enough? All I have is my 82 diesel
>>>> westy Bentley and all my $$$ and then some has been spent on parts. Your
>>>> help is greatly appreciated. Thanks!!!
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>>>>
>>>
>>>