Everything posted by Mack Technician
Any or all the above.......Top up coolant, clean the radiator, swap out the thermostat, check viscous fan by spinning (engine off) to confirm it has resistance, or unplug the A/C high pressure switch to manually turn engine fan on and off (switch is on right side close to top bolt of radiator support member). Last effort, have a radiator shop "rod out" plugged core or replace radiator.
We did it often in our Dealership. You need to find a CCRS engine with the same HP rating. Get a chassis vin from 2003 that was pre-egr (and CCRS) then use that to parts search. Mack stopped selling the full camshaft kit. You can still get a good cam and full kit from PAI, it is equal quality of OEM and costs much less. Also take the high restriction ex manifold off and switch back to a 2003 pre-egr manifold. Take the turbo exhaust shell off and hog it to match the flow outlet. I have a contact for 50HP injectors. You'll gain 50HP with no modification beyond an injector swap out. About $75 per tip. AI can be a great engine but you need to throw a little $$ into it. Most of our guys left the cam alone and did a "breather" mod on it with injectors and manifold switch. If you take away exhaust restriction you can nullify the AI, injectors do the rest.