38038 Discussion starter. 546 posts · Joined 2004. #1 · Apr 3, 2005. I would like to use a larger oil filter for my jeep and was wondering if any else has tried this with the 4.7 V8 (Motorcraft, Napa, purolator or wix are preferred). A part number would be great!! Also, I have neen using 5w-30, but was wondering if there is a better weight to Chain driven DOHC, 24 valves, hydraulic lash adjusters with roller fingers follower. Fuel Injection. Common rail, 29,000 psi (2000 bar), solenoid injectors. Construction. Compacted graphite iron cylinder block, aluminum alloy heads. Compression Ratio. 16.0:1. Power. 260 hp (194 kW) @ 3,600 rpm. S. soxfan1129 Discussion starter · Apr 30, 2015. So I have a 02 wj with the 4.7 non h.o. Motor, it's burning oil what seems like a lot to me, about every two weeks I dump two or three quarts in, it smokes on startup and a little on hard acceleration, motor seems like it's running great, no unusual sounds, but I'm guessing it's leaking through There are many causes of the P0456 small evap leaks. If you’ve found no leaks with a smoke machine test the purge solenoid. Make sure it holds vacuum. Another common failure if the ldp ( leak detection pump) the filter that connects to the ldp pump gets full of dirt. The first will eventually get passed the filter and get into the pump and OMIX Automatic Transmission Solenoid for 93-04 Jeep Grand Cherokee ZJ and WJ. In Stock. $120.00. Crown Automotive Transmission Support for 99-04 Jeep Grand Cherokee WJ 2WD & 4.0L 6 Cylinder Engine. In Stock. $59.99. OMIX 42RE & 45RFE Automatic Transmission Filter Kit for 99-04 Jeep Grand Cherokee WJ with 2WD & 02-07 Liberty KJ with 2WD. In Stock. Need to change the oil in a 2004 Grand Cherokee with the 4.7 High Output Engine. Found some very interesting information and was wondering why would Chrysler change oil specs after a vehicle has been in service for six years? The factory service manual says 5w-30 is preferred up to 100F and it is even labeled on the oil fill cap. 219 posts · Joined 2012. #10 · May 31, 2013. AHA! I guess being obsessed with the well being of my 4.7 has it merits. I'm pretty much under my Jeep after every trip I take to check things out. Anyway, I left the pressure tester pumped up for 5 hrs and it never dropped pressure, BUT there was a miniscule leak at the top of the water pump and a Joined Oct 28, 2008. 8,586 Posts. #2 · Jun 20, 2012. Skip the Castrol High Mileage. I'm a little bit of an oil nerd, so bear with me. The 4.0 needs oils with high ZDDP content to prevent premature cam and lifter wear. Unfortunately most newer oils (Castrol HM included) don't have much Zinc/ZDDP to satisfy the latest emissions requirements .

jeep wj 4.7 oil capacity