Jeep Strokers

If you stroked your WJ 99-04 / 4.0 motor your going to need one of these .

2001 grand cherokee 4.7 with the stock radiator and a new napa water pump works just fine.doesnt run any hotter than before,even in hot and humid weather.i do have a custom pcm tune though.timing and fuel play a big part in cooling!also napa waterpump has a much better impeller than the bmg one sold by some.

Who did your PCM tune?

performance injection equipment .real good to deal with much better than the place i bought my parts from.the guys name is chris.you will need an sct and he will just email you the tunes which you just download into the sct.you will also need a wideband o2 for air fuel ratios.i think you can get the sct from him as a package.