Quote:
Originally Posted by I'mJeepedAs
The Genie system looks like a nice piece of work. Does it make a noticeable difference with the sound of your engine and turbo spool?
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Exhaust is a little louder, still not as loud as the engine noise itself though (which is pretty loud on its own), no drone at all when cruising. The Genie system is actually fairly quiet compared to custom exhausts that others make up which usually have no mufflers at all, whereas the Genie system has a small muffler at the rear. So if its too quiet for you, can always remove the rear muffler.
Quote:
Originally Posted by I'mJeepedAs
Whats the problem with the stock cooling system?
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Generally speaking it is too small to cope with the heat that the 2.8 CRD can generate when the engine is labouring (i.e. when turbo is making more than 10 psi for prolonged periods of time). This happens when the JK is loaded up, towing, driving bigger tyres at hwy speeds, or any combo of these.
The fundamental prob is the pointy wedge shaped engine bay that means the grill area is not very wide, and on the CRD's there's coolant radiator, intercooler, and AC condenser all jammed in that little space.
In stock form the JK CRD's are fine. But if doing any of the things mentioned above, the CRD's can run a bit hot. Manual's don't suffer as much if at all, but auto's all have overheating issues cos the auto trans cooler is also upfront (actually shares with the AC condenser). Plus the auto transmission is not cooled very well either so it gets hot on its own, then this heat radiates from its cooler/AC condenser into the coolant radiator and intercooler, etc, and the whole lot just keep compounding until you find you've cooked your trans and/or your coolant temps have reached 120 degrees.
The fix if you do labour your engine a lot, is to 1. make sure the cooling system is in perfect working order, 2. flush out the Mopar coolant and put in proper coolant that doesn't eat up the plastics, 3, if auto trans, install a aftermarket trans cooler and bypass the AC condensor, 4. install a aftermarket heavy duty clutch fan, 5. make sure the stock elec fan works properly (i.e. spins freely and not clogged up with mud etc, and the elec fan relay is not burnt out), 6. consider heat reduction hoods/vents or bigger grills or removing accessories from the bullbar grill area, 7. install aftermarket bigger radiator, 8. make sure engine oil cooler (mounted to side of the block) is not blocked and functions properly (needs to be removed to be inspected/replaced).
If auto, most people do steps 1-4 and they have no issues after that. If manual, most people might do steps 1-2 and possibly step 4, but for the most part there's no real complaints from manual owners of overheating.
Bringing my JK back to life
