2000 Jeep Wrangler Lifter Knocking

DERDA

MEMBER
2000 JEEP WRANGLER
4 CYL
4WD
MANUAL
113,000 MILES

I was recently flooded my jeep when I fell into a sink hole and the tide came in. Notice you can see the guys flip flops in the water and this was what the hole looked like when I went to cross it.
I was told I was lucky because I got everything working again and it is running well. However I have a knocking when I start my jeep and it goes away after it warms up. I was told to change the oil to 10W40 to help out and I did this.

1st Knocking is still there how long do I have before I have no choice to replace this?

2nd Second what all is involved to do this and what do I need?

3rd Since I will have to do it are their any performance upgrades I can do that since I'm in this neck of the woods?

4th Fourth how do I do this?

5th The last is if I asked a good mechanic to do this

how long should it take.

5 Replies

MASTERTECHTIM

MECHANIC
4,749 POSTS

I cant really give a accurate answer without hearing the noise. First you have to make sure its a engine knock and not a exhaust manifold leak (they will sound the same) a exhaust leak will go away after the manifold heats up.

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Friday, July 25th, 2008 AT 3:50 PM

DERDA

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15 POSTS

I don't hear it after driving for a couple of minuets. I just was going by what a mechanic friend said he beleives it is a lifter.

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Friday, July 25th, 2008 AT 9:31 PM

AIRSOFTSOLDRECN9

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348 POSTS

A sticky lifter might be the culprit. I am not sure if the engine was running when you went into the water there (looks like you have a snorkle but I cant tell) but if the engine ingested any of it then it might be a cause for concern. You can try heavier weight oil (unigrade), lucas motor oil additive, or seafoam; however, removing the head and having it cleaned as well as the lifters would be the most effective choice.

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Thursday, August 7th, 2008 AT 3:24 AM

DERDA

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15 POSTS

No snorkel, when it happened we tried to start it after we pulled it out. I did use a bottle of lucas oil with 3 quarts of 10w30, as if now I have prestone high milage 10w40 in it now. I'm in an area of unknown but need the help that I can or ideas.

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Thursday, August 7th, 2008 AT 1:10 PM

AIRSOFTSOLDRECN9

MEMBER
348 POSTS

It would be best if you removed the cylinder head and had a good look at everything. I doubt you have a bent valve, but a spring leakdown test would be beneficial. The lifters will need to be inspected and cleaned too.