Pulling of a vavle cover to check the lifters?? - Jeep Wrangler Forum
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Old 07-12-2007, 08:08 PM   #1
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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, 08:37 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.

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Old 07-12-2007, 10:28 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, 10:36 PM   #4
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Rockers, Push rods, springs or valves
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Old 07-12-2007, 11:38 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.
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