Re: Head gasket choice?

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" <[email protected]> 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 <[email protected]
> > 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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>
>
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