DEMT Performance Engine Builds

Below you will find general information on our standard diesel engine builds and upgrades.  DEMT Performance Engines works with only authorized dealers for our diesel engine builds.  This does not apply to machine packages, kits, cylinder heads & general machining.

For an authorized dealer in your area, please send us an email at info@demtengines.com with your contact information and the city in which you would like to find a dealer.   If there is no dealer in your city, we will find the nearest one to you.

Cylinder Heads

Upon disassembly, all cylinder heads are cleaned, magnafluxed, and pressure tested. After which, the machining process begins with seats and guides replaced as necessary. Guides are fitted to specification and decks are cbn surfaced to 22-28 ra. The valve cutting ensues, a three angle cut is performed on the 4.0 Serdi valve machine and recessions are set within oem specs. Valves are checked for stem wear and refaced and the springs are checked for tension. At this time any extras needed (i.e. heli-coils, etc.)are noted. Heads are thoroughly washed and pre-assembly occurs. Stem heights are adjusted to specification and valves are installed with Clevite high pressure lube and new seals are fitted. Once heads are complete they are vacuum tested to ensure a tight seal.   **High performance parts added results in craftsmanship warranty only. 

 Reman. Cylinder Engines

Upon disassembly, engine block is cleaned, magnafluxed and pressure tested.  After which the cleaning process begins with cylinders bored and honed, deck block, check line bore,  o-ring where applicable, inslall cam bearings and freeze plugs as necessary.  Crankshaft is cleaned, inspected and magnafluxed, polished or reground.  Connecting rods are cleaned, checked, reconditioned as necessary and pin bushings installed.  Camshaft cleaned, inspected, poilshed and reground where necessary.  Parts included are Mahle master kit, Mahle pin bushings & bearings, Hylift Johnson lifters where applicable.  Cummins lifters are refaced.  Melling oil pump as needed.  Our standard reman. engines come with ARP rod bolts, ARP or IFG cylinder head studs, o-ring on 6.0 & 6.4 Powerstroke and  5.9 & 6.7 Cummins.   **High performance parts added results in craftsmanship warranty only.