Engine knocking. Any Solutions?

[kj04libby]

I have a 04 Jeep liberty 3.7 170k. I changed the oil with 4 quarts 10w-30 and a quart of Lucas heavy duty oil stabilizer. I instantly ruined a valve lifter and got a top end ping. Took the valve cover off replaced valve lifter, problem Solved. but now I have a low engine knock at idle and when I get in the higher rpms it's a rattling tin like noise. When I'm stopped and my rpms drop to around 600 rpms. My oil light comes on. As soon as I give it throttle it goes away. It only comes on when Im at a low idle. Any possible solutions?

 

[TheBlueKJ]

I have a 04 Jeep liberty 3.7 170k. I changed the oil with 4 quarts 10w-30 and a quart of Lucas heavy duty oil stabilizer. I instantly ruined a valve lifter and got a top end ping. Took the valve cover off replaced valve lifter, problem Solved. but now I have a low engine knock at idle and when I get in the higher rpms it's a rattling tin like noise. When I'm stopped and my rpms drop to around 600 rpms. My oil light comes on. As soon as I give it throttle it goes away. It only comes on when Im at a low idle. Any possible solutions?

Well you used Lucas sludge maker instead of actual oil so...

But on a more serious note. I have no idea what you could do to remedy that problem good luck.

 

[tommudd]

wrong weight oil
Lucas Heavy Duty Stabilizer
have you thought of changing the oil and see what it does with the right oil and nothing else added?
Of course I don't believe in all of that extra junk adding to the oil

 

[ridenby]

Maybe Thunderbirdjunkie has an engine.

 

[kj04libby]

I've changed my oil twice since then. And if I have an actual real mechanical problem when this engine goes I'm in the process of rebuilding a 4.7 that I wanted to drop in it. just not as soon as I thought I would have to

 

[ridenby]

Carry your 4.7 with you cause you will need it shortly

 

[kj04libby]

Do you really think it will go soon?

 

[tjkj2002]

Do you really think it will go soon?

Can be 5mins from now or in 100,000 miles.

 

[kj04libby]

I hope it's not too soon. I wanna replace the oil pump and water pump in the 4.7 before I put it in. And I work at subway and money is hard to come by lol. Plus I only get about 25 hrs because of college

 

[TwoBobsKJ]

Mine started with a light tap but then turned into a steady knock. Ended up being a rod bearing on the #6 rod. Here's what it sounded like when I tore it apart:

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That rod was starved for oil at some time in it's life - swapped in an '07.

Bob