This is mandatory for proper sealing of a MLS Gasket. The Cylinder block is surfaced to a finish of 30 Ra or lower, which meets the factory specification in both flatness and smoothness for the block to head sealing surface.

The piston diameter measured to the nearest. We bore the block back to the crankshaft center line and hone the block to Ra 13 finish. We main bore and line hone the crankshaft which is honed to precisely align the crankshaft in the engine block. 0002″ for precise piston to cylinder bore clearances. – Full CNC blueprint machining, (bore, deck, hone, and line honed) – The Cylinder bores are blue print bored to a true 90 degrees from the crankshaft center line, prior to being diamond honed to within. Optional parts are covered under the manufactures warranty and not by CHOATE.** **Please Call For Pricing and More Information** We will need the year, make, model, and vin number to make sure you are buying the correct engine before we ship. Meaning if we send you a long block we require everything from your core long block to be usable and machinable.Īny core engines not returned within the specified time will be subject to a restocking fee of 40%. once inspected appropriate core fees will be kept and balancing remaining will be refunded promptly we require a like for like core. Inspection of core takes approx, 30 days. The engine will be shipped to diesel doctor of tn in shrink wrap on a non returnable wooden pallet & the appropriate core charge due. (core must have no visible cracks or holes and rotate 360 degrees) core will be inspected and must meet diesel doctor of tn specifications to deem it a good usable core. If you have no core or the core is no good.

Failure to do so will void your warranty. however there may be fees after inspection to be paid before your new engine ships out by buying you agree to have the engine core ready for pickup and return to us within 30 days of receiving the engine. If you choose to send your core in first there is no fee charged up front.

If you have questions, please feel free to call us at (901)553-9847 or email charge will be paid up front in the amount quoted on your estimates. All customers must understand and agree to the core policy below.

5.9 cummins rear main seal install tool