'00 Jeep Grand Cherokee Engine Knocking after changing oil
I have a 2000 Grand Cherokee and i had gone probably 9000 miles between oil changes and now I changed the oil and its knocking, I think its a top knocking, there is not water on the oil, or metal shavings in the oil either but not sure if it may be a lifter or a rod?
2003 WJ in Jeep Green Metallic, 4.0/242/4.10's. 4" Teraflex springs w/ RE monotube shocks and IRO short arms, cheap intake w/ amsoil filter, 2.5" hi flow cat and back exhaust, lots of lights and other misc crap.
You should always fill it up all the way, running low a quart of oil isnt the worse thing you can do, but lets just say its not the best either. Fill that last quart up with a quart of lucas and go from there.
From my own personal experience 5.5-5.75 quarts is the magic number. Remember that some oil stays in the crankcase.
I usually fill it to 5.5, drive it, let it sit for a bit, then read the dip stick and bring it to full. It never takes 6 to fill it.
Just dumping in 6 is not necessary and IMO not worth the risk of overfilling even slightly.
Also being down roughly 1 qt should not cause knocking.
With the 4.0s I had and my 4.7 I dump in the 5 quart jug and then 1/4 to 1/2 of the 6th quart, start and let idle for a few minutes and recheck.
I always ran Lucas in my ZJ after 120k or so. I would use almost a quart in the summer, and about 1/2 in the winter. That helped a lot. I would also advise against a certain orange filter, that happens to have FRAM painted on the side In my very limited experiences with them on a 4.0 the anti-drainback valve or whatever you want to call it was less than adequate
Oh, and since I don't think it's been mentioned....9k is probably a little long if your not running synthetic.
__________________ The Past
95 ZJ Laredo 4.0
00 WJ Laredo 4.0 & 4.7
08 WK Laredo 4.7 (traded for tin can) The Present
07 JK Unlimited Sahara
Last edited by dougy147; 04-08-2009 at 07:02 PM..
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