The Good & The Bad - Forged Build II - Under the knife

Ouch - 0psi on the oil pressure gauge, drop the sump and find this @_@

The oil pickup was intact @_@
So what is the issue! Later found out the oil relief valve had jammed/siezed, I'm guessing due to this grit... Sad days

















Stripping a good oil pump










Out she comes, getting good at this.






Later i split the oil pump to find this!











Bores look good








She only did 100km









Shiny under there

5th main bearing took a beating.










 100/150km









Thrust bearing clearance issue? Or just that grit contamination





Previous history:
 - block has been decked, bored, drilled and tap for oversize head studs.
 - crank was ground, due to damage
 - head was decked, ported & flowed, new stem seals, lifters cleaned and bled
 - supposedly hot tanked (we also washed everything - no idea where the grit came from)

Current state:
 - loss oil pressure
 - dropped the sump, thinking oil pickup came off
 - found ferrite grit in the sump!
 - popped some main caps and was not happy
 - oil pump relief valve was seized due to this grit we found.

What next -
 - everything re-washed / hot tanked
 - crank polish - looked closely and the crank seemed pretty good
 - investigate the bore, is it worth a quick hone and new rings? or carry on...machinist reckons don't worry (I'm guessing because oil isn't under pressure on the bores, just for cooling.
 - new mains and big end bearings - oversized .25mm

http://mitsubishi.epcdata.ru/colt/z27ag/xngf1/

Replacement Parts:
1211A001 CASE ASSY,CYLINDER BLOCK,FR
MD183238 GASKET,OIL STRAINER
MD324702 GASKET,THERMOSTAT CASE

Thermo [i just want the rubber seal on it]:
MD337408 THERMOSTAT KIT

Colt:
MF665541 QTY 02 CAP,CYLINDER HEAD SEALING,35mm
MF665541 QTY 08 CAP,CYLINDER BLOCK SEALING,35mm
MD109259    04 OIL JET,CYLINDER BLOCK
MD301144    01 SEAL,CYLINDER HEAD CAMSHAFT END

MN119843    08 ROCKER ARM,EXHAUST VALVE
MN119843    08 ROCKER ARM,INLET VALVE
MD376687    16 ADJUSTER,ROCKER ARM LASH

Evo:
OEM Freeze Plug Kit for the 95-99 7 bolt engine and the Evo 8 and 9 engines the kit includes 7 35mm (mf665541), and 2 40mm (mf665542) freeze Plugs.