Well this is pretty weird, the PO did not change the oil often, so i changed it twice before giving it a "NASCAR" lol, oil change, I flushed it with motor flush, put thicker 10w40 and lucas sythetic. the reason why i did this too is because it had a small knocking sound before... lol but now with this good oil change its giving me a even louder knocking sound, lol feels like it cant handle it, but my co worker has an xj as well and he also added lucas synthetic to his change and he got a knocking noise too when he did ot have one before, lol

So is this normal or what? Is the NASCAR change too good lol

 

Sounds to me like you flushed all the build up out of the lifters.

 

the knock probly got louder because of the flush getting gunk build up out now you hear more matal to metal vs gunked up metal to metal.... just my guess

nascar doesnt change oil like that.

x2 with nick

 

Yeah i know jus using sarcasm with a good oil change lol, so meaning? good or bad?

 

Well and metal on metal is not good. Your looking at a future engine rebuild..

But alot of 4.0L's run for years sounding "knocky".. So it's a hit and miss.

I'd say start looking for another engine to over hall while your waiting for this one to die.

 

lifters..........this is why i believe motor flush + high milage engines is a NO NO. very few good things come out of it.

 

If the rapping/knocking noise is up high, around the valve cover area, I would think it is a lifter collapsing (losing its prime).

 

I wouldn't flush a old or high mileage out. You probably washed out the bearings. Put some heavy weight oil in there maybe it will make it quiet down. straight 30w plus once you use synthetic oil now it a commitment because going back to regular oil will deteriorate your seals and whatever else it attacks I don't know everything about synthetic other than that you can't mix it with regular oil and your motor will run a few degrees hotter if somebody wants to correct me that would be great.

 

hmmmm.... well it runs good, so to tell you the truth idk, lol but i dont mine using the lucas everytime, and i will make sure i wont do a motor flush again, my mechanic cousin recommended me to do it but then again he only works on mostly cars, so i hope i didnt hurt my engine when all i trying to do is pamper it

 

studmuffin are you a chick
cust thats what we call girl carpenters studmuffins

 

lol well even though im not ill take that as a compliment...... although that was mighty nice of you to share that with us

 

it doesn't really mater ether way I just had to get it out of the way or I would be wondering

so how the heck did you come up with studmuffin

 

well its a long story, mostly when i use to be in high school i use to play online games. but when i woulde play call of duty 4 (first person shooter war game) i came up with stud muffin because no body would like to be killed by a guy with a user name stud muffin. Jus like no one would like to lose a football match against a team called the lady bugs..... lol i jus did it to **** off people and well i guess it jus stuck on me.... So you guys really call your lady carpenters that? lol

 

only the good ones
not much any more its not politically correct
and there are not to many any way

but it was a complement and 99% liked it
cus they were studs on the job and good looking girls of the job

studs cus on the job they were strong hard workers
muffins cus off the job they were soft and tasty
it was never disrespectful

 

ohhhh ok, no yeah i understand, well once you explain it makes sense most girls will think you are hittin up on them. ha, but well for that reason is why i like stud muffin, plus i think it sounds pretty cool and when most people hear it, it puts a smile on their face, haha must admit