[T3] There will be a 4th build

[William Jahn]

If I recall you use synthetic oil. Perhaps that's the issue. I know many
use it yet if you really do a search even Gene Berg does not recommend it
because it may cause lower case temps but higher head temps.

On Thu, Jun 25, 2020 at 6:25 PM Keith Park <topnotch at nycap.rr.com> wrote:

>
>
>
>
> 2056 is coming out of the Square again, but this time there is no stock
> engine to put back in!
>
> The first build failed because the AA cylinder set was defective, the
> galley
> plugs were done wrong and I removed the windage tray, which maybe you don't
> need in a bus
>
> As if your going around a corner that fast your Bus will be on its side,
> but
> in our application you need the tray AND a Tuna can sump to keep from oil
> starvation.
>
> The second build failed when the lifters showed wear from not rotating,
> amongst a couple smaller problems.  The third build re-used the same AA
> cylinders and KB pistons
>
> From build 2 which were noisy when cold but fine when hot but some may
> remember that when I started it with the break in oil, which I used because
> it had a new cam and lifters in it (same
>
> Cylinder/piston set, I never even pulled the pistons from the jugs) the
> engine got so tight when at temperature that it almost wouldn't crank over
> (it was NOT overheated).
>
>
>
> So since new the 3rd build, which now has 10Kmi on it has sounded like a
> diesel once warmed for a few minutes, clatters like mad below 2000RPM,
> above
> that. fine, when started cold, fine. unlike build 2 which was noisy cold
> and
> quiet hot. now one of the pistons clangs away pretty bad in there till
> fully
> warmed so its time to do something before something bad happens.
>
> Since it's the same piston/cyl set from build 2 it must be that the break
> in
> oil damaged them, it was only in there for 40 miles but this kid at
> 1000miles on it already, so they were basically broken in.  and ONE person
> on the forum suggested that this was an issue with break in oils.  Anyone
> else heard of this?  Once the oil was changed everything was free moving
> when hot.
>
> Gee. this harkens back to the Amzoil days when that ruined my engine back
> in
> the 80's!
>
>
>
> After talking with the Kit designer Jake Raby, Im going to bore out the
> original 2L 94mm jugs to 96 and use those with new KB pistons, and have the
> shop fit them carefully, last round I just put the pistons in the Jugs, set
> the rings and was done with it but the Stubby little offsetless KB's are
> VERY sensitive to clearance and Jake hates the quality of the AA's cast as
> well as the poor quality control of their boring so they are probably the
> issue here.  The good news is that the lower end is perfect, excellent oil
> pressure and no starvation, still a bit worried about the valve lifters as
> nobody could figure out why the last set didn't rotate but the adjustment
> has held fine in the past 10Kmi so they are probably OK.
>
>
>
> So once again.  Sigh!!!  Cheap parts are really a problem out there!
>
>
>
> I keep hearing this voice, STOCK..  Come BACK to the light..  But im afraid
> that my accelerator pedal would never feel same again!
>
>
>
> Keith
>
>
>
>
>
>
>
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