Trevor's EG-33 before the teardown
Trevor purchased this engine from a reputable engine builder who
had taken it in payment for another engine. This engine was
specifically built for a high performance application and we were
told that it had already been upgraded significantly (but was making
some slight "ticking" noises, so we better have a look before
running it). That didn't bother Trevor too much, he was
intending to take it all apart and "race prep." it anyway so let's
get to it!
Alternator, Turbo and Intake Manifold removed
Nothing very interesting to see
Oil Pan removed
This engine will be "dry sumped" when it goes back together -
these engines are known to have problems with oil pressure in off-roading
if they aren't..... Still nothing alarming to see.
Timing Belt covers removed
Cam/Valve covers removed
We can see some camshaft lobe and lifter damage at this point -
no big deal, we have to replace them anyway as they were for use
with the turbocharger.
Case ready to be split
Yeah, that's easier said than done with a
Subaru motor - the pistons will not come out the "bottom" of the
cylinders so it's necessary to separate the pistons from the
connecting rods before "splitting" the case halves. Getting to
the clips that retain the wrist pins is difficult on the "outside"
cylinders but the "middle" cylinders took some effort.....
There's probably a tool specifically for this job but Trevor doesn't
have it and neither did anyone he asked.....
Finally, the case halves "split"
Now that we have access to the internals,
we can have a close look
"Spun" Main Bearing
I'm thinking "a little ticking" was more
like "a loud knock that scared the Hell out of us so we tore the
engine out of the car and made it someone else's problem".....
Fortunately, the case halves and crankshaft seem to be okay and we
were going to replace all the bearings anyway. Remember that
"off-road oil pressure problem" I mentioned earlier? Here's
the result of running without oil pressure.....
Now you see why the pistons don't come out the
bottom of the cylinders...