We at Aerohill Engines are quite familiar with the Chrysler 3.6 11-13 Engine, known as the Pentastar engine it was designed to replace the aging Powertech series engine. The engine comes in a 3.0, 3.2 and a 3.6 variation. This engine has been known to end up with cylinder misfires that are a result of prematurely failing valve rockers, and when this damage starts to happen the camshaft and valve stem head are damages. Simply replacing these components are not enough, then the valve rocker starts to fail the metal shaving make it way around the engine suspended by the oil and pumped around the engine via the oil pump and the many passageways inside the engine. These particles embed themselves in the bearings of the engine and dramatically shorten the lifespan leading to knocking and ultimately complete engine failure. It is also recommended to replace the variable camshaft actuators as the same time.
The Pentastar engine also suffers from oil filter housing leaks and generally needs to be replaced as an upgraded part has been produced by the OEM.
Engine Remanufacturing Procedure
There are many steps involved in remanufacturing an engine. Our extensive process ensures that no part is left to chance. We will never just remanufacture the top or bottom of an engine and put our name on it.
- Disassembly of the engine
- Manual scrubbing of heavy debris
- Engine degreasing
- Hot akaline spray jet cleaning
- Pnuematic wire brushing
- Ultrasonic cleaning
- Removal of broken studs
- Measuring all the various sizes of the components to manufacturer specifications
- Machining of cylinder bore to accept new pistons
- Check for warpage with straight edge
- Milling cylinder head surface
- Cutting valve seats
- Gnurling valve guides
- Machining valve surfaces or replacement
- Testing valve spring resistance
- Magnaflux cylinder heads for crack detection
- Adjust valve clearance
- Assemble cylinder head
- Machine crankshaft to accept new bearings
- Assemble engine with all new pistons, piston rings, rod bearings, main bearings, oil pump, timing kit, balance shaft bearings, valvetrain components, lifters, gaskets etc.
- Spin test engine
- Tape all ports and package engine in a corrosion inhibiting bag