THIS IS A 1970\'S BMW STD 2002 AND Tii E12 CYLINDER HEAD.
ACCORDING TO BMW THE ORIGINAL FACTORY HEIGHT OF THE E12 HEAD IS 129 mm.THEY RECOMMEND RE-SURFACING TO NOT LESS THAN 128.5 mm.
THIS HEAD MEASURES THICKER THAN THEIR RECOMMENDED MINIMUM HEIGHT.
ALTHOUGH THIS WAS ON A RUNNING CAR WHEN IT WAS REMOVED, IT DID NOT SMOKE, AND SEEMED TO RUN NORMALLY. BUT I HAVE INDICATED WITH A SHARPIE WHAT APPEARS TO BE A TINY, BARELY VISIBLE CRACK BETWEEN VALVE SEATS IN THE SECOND CYLINDER COMBUSTION CHAMBER. THE COMPRESSION PRIOR TO REMOVAL WAS IN THE NORMAL RANGE, INDICATING THE TINY CRACK WAS PROBABLY CLOSING AS EXPANSION OCCURRED WHEN THE ALUMINUM HEAD WAS HOT AND RUNNING.
TWO OTHER ISSUES ARE EVIDENT UPON CLOSE INSPECTION.THERE IS A VOID IN THE WATER JACKET ADJACENT TO THE NUMBER THREE COMBUSTION CHAMBER. IT DOES NOT GO THROUGH THE COMBUSTION CHAMBER WALL.IT APPEARS LIKE A PREVIOUS OWNER MAY HAVE TRIED TO DRILL OUT AN OBSTRUCTION IN THE WATER JACKET?THERE WAS NO EVIDENCE OF COOLANT LEAKAGE ON THE PISTON, OR THE WALLS OF THE THIRD CYLINDER.THIS VOID WOULD NORMALLY BE COVERED WITH THE INSTALLATION OF A NEW HEAD GASKET, BUT IT CAN BE DISCONCERTING. ALSO THERE DID NOT APPEAR TO BE ANY VAPOR FROM THE EXHAUST WHEN WARM.
LASTLY IN NUMBER ONE COMBUSTION CHAMBER THERE ARE A FEW PITS. THERE WAS NO EVIDENCE OF DAMAGE TO THE PISTON HEAD OR THE VALVES THAT I COULD OBSERVE WHEN I REMOVED THIS HEAD, SO I\'M ASSUMING THIS WAS DONE PRIOR TO THE LAST INSTALLATION BY THE SAME PERSON WHO ATTEMPTED TO DRILL OUT THE WATER JACKET OBSTRUCTION.
THERE WERE A NUMBER OF FACTORY INSTALLED 2002 HEADS THAT HAD WATER JACKET OBSTRUCTIONS IN THE CASTINGS THAT RESULTED IN THE ENGINE RUNNING HOT, AS BMW MAY HAVE DIMINISHED QUALITY CONTROL IN THEIR ZEAL TO FULFILL ORDERS FOR THIS VERY POPULAR MODEL.
I HAVE A NUMBER OF TIMES RUN A CAR IN THE PAST WITH TINY CRACKS BETWEEN THE VALVES WITH NO APPARENT LOSS OF POWER, WITH MY CONCURRING THE CLOSURE OF THOSE TINY CRACKS AS THE ENGINE WARMED UP WAS RESOLVED WITH THE ALUMINUM HEAD EXPANDING.
OF COURSE THE ABOVE INDICATED SITUATIONS CAN BE EASILY REMEDIED BY A GOOD MACHINE SHOP WITH WELDINGS AND BURRING PRIOR TO THE PROCESS OF RESURFACING THE HEAD.
AS A BONUS TO OFFSET SOME OF THE ISSUES, I WILL INCLUDE A FRONT CAMSHAFT GEAR HOUSING.A HUGE BENEFIT IS THE HOLE IN THE CASTING FOR THE MECHANICAL FUEL PUMP CAM-ACTIVATION ROD COMMONLY FOUND ON THE STANDARD 2002 COUPE.OF COURSE THIS DOES NOT PRECLUDE THE USE AN ELECTRIC FUEL PUMP, AS YOU CAN USE A READILY AVAILABLE BLANK TO DISABLE THIS FEATURE, AS ON THE Tii.
A FAIR NUMBER OF OWNERS INSTALLED ELECTRIC FUEL PUMPS TO REDUCE MECHANICAL ENGINE LOADS DURING THIS GENERATION OF BMW\'S (THE EARLY SERIES 320i\'s THAT HAD E12 HEADS HAD ELECTRIC FUEL PUMPS AND NO ACTIVATION ROD HOLE).
THIS IS THE PREFERRED TRIPLE HEMISPHERIC COMBUSTION CHAMBERED CYLINDER HEAD USED IN THE 2002.
AS THIS IS A USED VINTAGE PART, THERE IS NO WARRANTY, SO SOLD AS-IS, AND NO RETURNS.
THE BUYER IS RESPONSIBLE FOR RESEARCHING THE COMPATIBILITY OF THIS CYLINDER HEAD FOR THEIR VEHICLE.
I\'VE TRIED TO BE AS CLEAR AS POSSIBLE IN MY DESCRIPTION AS TO THE CONDITION AND APPLICABILITY OF THIS CYLINDER HEAD, BUT THE FINAL APPLICABILITY IS THE BUYER\'S RESPONSIBILITY. IF THERE ARE ANY FURTHER QUESTIONS ABOUT THIS CYLINDER HEAD BEYOND WHAT IS LISTED IN MY DESCRIPTION, PLEASE MESSAGE ME, AND I WILL HAPPILY RESPOND TO THE BEST OF MY ABILITY.
THANK YOU FOR YOUR UNDERSTANDING.
I WILL SHIP WELL PROTECTED IN A HOME DEPOT TOUGH BOX TO CONTINENTAL US ONLY. ALL THE SHIPPING SERVICES NOW CALCULATE THEIR SHIP CHARGES BASED ON DIMENSIONAL WEIGHT (DIM).THE DIMENSIONS OF THE SHIPPING CONTAINER ARE IN INCHES AS FOLLOWS: (28.5 X 19.5 X 11) DIVIDED BY 139, AND ROUNDED UP.
DO NOT, I REPEAT, DO NOT USE THE ESTIMATED WEIGHT IN THE LISTING. IT IS ALWAYS BASED ON THE UNPACKED ACTUAL ITEM WEIGHT, AND IT IS NEVER ACCURATE. THE DIMENSIONAL WEIGHT IS 44 POUNDS. USE THIS WEIGHT, AND YOUR ZIP, AND CHOSEN CARRIER TO CALCULATE THE SHIP CHARGE.
ALSO HAS AN EXPLANATION OF DIM WEIGHT CALCULATIONS ON THEIR SITE.I DO NOT CHARGE FOR THE TOUGH BOX OR PACKING OR MY LABOR, EVEN THOUGH RECOMMENDS THIS.
GOOD LUCK.
