For over 40 years, Neponset Valley Machine has provided the best in Engine Rebuilding. Expert Engine Rebuilders Rebuilding Foreign and Domestic Engines, Marine Engine Rebuilding, Automotive Engine Rebuilding , Performance Engine Rebuilding , Flathead Ford Engine Rebuilding
With superior performance, durability and overall customer satisfaction Think Neponset Valley Machine- Always Top Performing !!!!
Our Total Quality Approach to Engine Rebuilding.
Steps to Remanufacture Blocks: Engine Rebuilding
First, the blocks are completely disassembled and cleaned with all plugs removed,
Then washed BEFORE and AFTER machining for a minimum of 3 times,
Blocks are then crack tested,
Any broken bolts are removed and any damaged threads are repaired and cleaned,
Torque plates are used when required by O.E.M,
All cylinder walls are platue brushed for quick piston ring seating,
The main bearing saddles are align-bored,
and Lastly, new freeze plugs and galley plugs are installed.
Our Steps to Remanufacture Crankshafts and Connecting Rods:
First, both crankshafts and connecting rods are cleaned and shot blasted,
Then, they are checked for straightness and twist,
They are then reground and micro-polished to a 10 micro finish,
Micro Sleeves are then installed on most crankshafts, for a new seal surface,
and Lastly, connecting rods are precision honed and balanced in sets to within 7 grams.
Our Steps to Remanufacture Cylinder Heads:
First, We completely disassemble the cylinder heads to ensure a thorough cleaning of all coolant and fuel passageways,
Then, the cylinder heads are oven cleaned and thoroughly blasted to remove all carbon and oil deposits,
They are then magnafluxed to detect any cracks,
Then, they are accurately resurfaced to ensure a proper gasket seal,
The valve guides are then replaced or repaired using bronze liners,
The valve seats are then machine cut to a triple angle (all three angles are cut simultaneously),
Hardened seats are then installed (when applicable),
The valves are then machined at stem and face,
New rocker studs are installed when needed,
The springs are then cleaned, tested and installed with shims to maintain proper tension,
Lastly, they are vacuum tested to ensure proper valve seating.
The Final Step: Engine Assembly: Engine Rebuilding
First, the crankshaft is installed with all new bearings and rear seal,
The thrust clearance is measured at installation,
Then, the piston and rod assembly is installed with "Prolong" assembly lube,
The piston to bore clearance is measured three separate times on the engine,
The main and rod bolts are then torque to manufacturer specifications and Loc-Tite is applied,
New or reconditioned camshafts are then installed with new timing components,
Cylinder heads are then installed with new gaskets, head bolts sealed (if applicable) and torque to manufacturer specifications,
Head bolts are marked to verify that they have been torque,
New lifters and push rods are then installed with clean and inspected rocker arms and fulcrums, New rocker arm adjusting nuts complete the valve train,