Pulling of a vavle cover to check the lifters?? - Jeep Wrangler Forum

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Old 07-12-2007, 07:08 PM   #1
jeeper95yj's Avatar
Join Date: Jun 2007
Location: Parsippany, NJ
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Pulling of a vavle cover to check the lifters??

Back again guy's! I have a 95 yj I-6 with 186,000 on it. Recently there was a tapping noise, thought it threw a rod, but it turns out it was coming from the top. Brought it in to have it looked at, they did a compression test and said that Cyl 1 wasn't firing, replaced the plugs, but I had no cash to go further. So...I am going to pull the vavle cover off tomorrow and take a peek, how can I tell if a lifter is bad, and can I start the engine with the valve cover off to see if the lifters are working??? Any help is appreciated!

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Old 07-12-2007, 07:37 PM   #2
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The lifters arn't under the valve cover it's farther down by the cam.The rockers and valve springs are under the valve cover.

99 sahara
flowmaster40,hpd30 with aussie locker,currie upper joints,4.88's, lca skids,chromo shafts,vanco brakes,d35 with super 35 and arb locker,re 4.5" springs,currie arms,re front uppers,Re shocks in back,walkerevens shocks up front, Re track bars with currie jj joints,anti rock,ss brake lines,re rear sway bar links,jks 1.25" bl and mml,bfg 35x12.5 km2's,craiger soft 8's,ome steering stabilizer,currie hd steering,rockmen front bumper,emp tank skid,lots more too.
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Old 07-12-2007, 09:28 PM   #3
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Any idea what could be making a loud tapping/ knocking sound towards the top of the engine?
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Old 07-12-2007, 09:36 PM   #4
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Rockers, Push rods, springs or valves
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Old 07-12-2007, 10:38 PM   #5
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pull the valve cover and put a socket on the crank pulley. crank it slowly and check that each valve is opening and closing completely. if a valve is bent you'll be able to tell bc it wont close and youll see the spring is loose. if you still cant tell, you can start it w the valve cover off to see if u can isolate the noise. be prepared as it will be slinging some oil on you.
'90 YJ, ford 8.8, SOA, lincoln front, aussie rear, 4.88s, swampers.
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