Lifter Knock
 

Last night I changed the spark plugs and valve cover gasket on my 2000 Jeep Cherokee Sport 4.0l 6. After I finished the job I started it up and got a lifter knock that wasnt there before any ideas?

maybe you didnt gap your spark plugs right and its causing a tick?

if you didnt gap your plugs right it could cause i mis that sounds like a tap. or you may have gotten something under the valve cover when you had it off.

thanks
 

used bosch +2 plugs no gap needed, I gues I will check under the cover thanks!

junk plugs. you should do some research before you use a plug like that

Yeah stick with Champion plugs. Jeeps seem to do better with Champion truck plugs

Thats your problem.

Champion copper..........didn't Model T's come with those?

Nice attitude, I'm new here good first impression

Sarcasm? If so, I saw nothing wrong with that comment honestly.

Hes right though, stick with Champions. You need RC12LYC plugs for yours, IIRC (someone correct me if Im wrong, thats what my girlfriends 96 uses)

turn up the radio

I didnt realize a plug could make so much difference, The plugs I used came with the jeep when I bought it time to stop by napa and get some champions!:thumbup1:

get copper cores

Might try checking at night time to see if you have bad spark plug that causing the coil to jump spark to ground. Had less problems with Champions plugs on 4.0 engines.

Champions are champions!
 

I replaced the Bosch plugs with Champion Copper Plus plugs......Starts and no knock! Thanks to you all!!!!:red_indian: