month ago, Marin and I went to garage to start engine
and play with MS. Everything went nicely, and after
few hours engine started perfectly every time - that
means that cranking settings are probably OK now.
enrichement also seemed OK , because car engine doesn't
stall few seconds after cranking - idle goes pretty
high immediately to prevent stall after cranking and
then for about five minutes warmup enrichement holds
idle at around 1300-1500 RPM, until coolant temperature
comes to about 70°C.
A/f mixture is read by VE table. But,
when everything seems perfect - some s**t must happen,
Murphy's Law didn't avoid us unfortunately :-(
thing is that one day when we wanted to start car, one
little transistor (known in MS-EFI community as notorious
"Flyback transistor") decided to die that
day together with his companion (FET driver chip) and
leave us alone - because of that , all 4 injectors stayed
open continuosly - engine flooded, and when we noticed
that it was too late, crazy amount of fuel went through
big 330cc injectors and filled up combustion chambers
(and good part of the oil sump too) - Marin quickly
shut down engine and MS...
little investigation, we find dead transistor and chip
as we expected, everything else with MS was fine - I
took chip and transistor from my MS and car fired up
very hardly and strangely , and also worked very badly,
like it doesn't rev freely.I immediately suspected that
we hydrolocked engine - it can happen, as can be read
on MS-EFI forum.So Marin was pretty dissapointed and
decide to tear appart complete engine to see what surprises
are hiding down there, but the greatest surprise for
us was that there are no surprises
there , hmmmm....
is the suspicious engine - even if that engine is damaged
somehow it really doesn't matter any more, beacuse Marin
finaly has 1600cc engine ready for dropping in, so he
dismantled this engine only for 2 reasons:
reason is his famous curiosity.
second reason - he just loves dismantling engines in
cold winter afternoon :-)
is attacking engine carefully but quickly from all sides
with his bare hands - when someone would decide one
day to organize "Fiat SOHC Engine Removing Competition",
Marin would be placed probably very highly, I guess
somewhere at Top 3....seriously, would you dare to compete
with man who doesn't need wrenches, just look at the
when the tough gets going, even Marin must use tools,
this time he took extra long socket #13, so he can rotating
rachet elegantly with his one finger...;-)
some fluids can be seen - engine fluids, not body fluids,
of course :-()
removed camshaft cover and now is removing head bolts.
head bolts are removed, but before that , we'll check
oil that was in camshaft housing...
we expected, there was large quantity of gasoline in
oil - engine flooded and large amount of fuel passed
through piston rings in oil sump and mixed there with
rest of engine oil. Luckily everything looks great:
complete camshaft mechanism seems OK, without any trace
of seizure or other damage due large amount of gasoline
After we checked camshaft, Marin removed carefully head
and on pic he is removing headgasket - he was very excited
because he expected some damage there , in fact he was
in very cheerful mood - to someone who doesn't knew
him it could sound crazy, but for me it's normal because
I know that Marin can't wait to remove that engine and
put 1600 engine with large turbo he,he...
as I told before - everything looks great - what the
tried to rotate engine with wrench placed on crankshaft
- now without head and compression, somebody would expect
that engine must rotate totaly easily - sounds logical
to you? Of course it does!
logical to me and Marin? Of course it does!
we took a wrench as two normal people and tried to rotate
that stupid bastard just didn't want to rotate easily
It's very strange thing , so we took a look inside cylinders
- there are no scratching or seizuring signs - everything
looks OK...even cross-hatch signs from cylinder machining
are still evident...this is crazy...
then tried to rotate few times to check all cylinders
and now on every rotation it seems that there is a position
where engine is almost stuck completely and almost impossible
to rotate, after lots of torque it somehow moved, and
then on next rotation again almost stuck on same position
...what's the fuckin' problem then ?!?!
Maybe slightly bent rod, maybe broken rings, maybe ugly
gremlins inside oil sump are blocking crankshaft and
laughing to Marin and me...
think that with our luck, 3rd scenario is far more realistic
then other two ....
after few really hard pushes, we heard some strange
sound , like "klang! "and with some miracle
somehow engine rotated more freely - what happened ?
Something let loose? Who cares now , engine must go
out very soon anyhow...
really don't know what happened but we were exhausted
from manual engine rotating and I said to Marin that
he now can turn on the electric starter and I'll check
cranking speed...just to see what will happen...
this is the result - something interesting - a video
clip of Uno Turbo 1.3 IE engine cranking without head
- hey, I bet you don't see pistons moving up and down
in cylinders every day ;-)
download : right click on pic and then "Save link
is about 590 kB large....have fun!
cranks easily now, as can been seen on clip...but soon
his larger SOHC relative will come on his place anyway
- so this is his last cranking probably in this year....