Maryland Cherokee Club
03-13-2012, 07:27 PM
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Location: glen burnie md
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Year: 2000
Model: Cherokee
-i'll sacrifice-n-take it off yer hands--
)-----you told him!!
it appears to me--that i like 98xj's rack----just sayin,,without even editing it?-
03-13-2012, 07:31 PM
Moderator of Jeeps
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Location: Frederick, MD from Cleveland, OH
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Year: 1993 YJ Wrangler
Engine: 4.0 I6
Mark 1 vw in Walkersville, MD
http://www.woodsboroautosales.com/mark1repair.html
http://www.woodsboroautosales.com/mark1repair.html
I made it on Page 1000
03-13-2012, 07:38 PM
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Join Date: Feb 2012
Location: Mt Airy, MD
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Year: 1997/2000
Model: Cherokee
Engine: both 4.0's
So I have been reading and reading and reading and reading about the knock in my engine, and watching youtube videos to find sounds like mine. Finally came to the consensus it was lifter/valve noise.
So I came across some information from 5-90. If you are familiar with him from here or NAXJA, the guy knows his stuff.
Anyway....so here is what I did. It was a pass or fail test going in and I knew it. I ran the engine at 3000 RPM for three minutes, and then at almost 4000 RPM for 1 minute. Stopped and let it go to idle.....
The knock was 90% gone...HOLY HELL! IT WORKED....the theory...if it's stuck lifters/valves, running it at high RPM's can un-stick them. I can still very FAINTLY hear it...but it is FAINT. So I went to the store and got some MMO and Mobile 1 High Mileage and a new filter. I will change the oil tomorrow with the good stuff and post my results.
It was kinda scary...if it's a rod knock, piston skirt, etc...running it like that will definitely expose that weakness...I was just waitin for her to blow.
Anyway, thought I would share this. This is NOT talked about a lot on the web....but I did find it...and it did work. So far.
So I came across some information from 5-90. If you are familiar with him from here or NAXJA, the guy knows his stuff.
Anyway....so here is what I did. It was a pass or fail test going in and I knew it. I ran the engine at 3000 RPM for three minutes, and then at almost 4000 RPM for 1 minute. Stopped and let it go to idle.....
The knock was 90% gone...HOLY HELL! IT WORKED....the theory...if it's stuck lifters/valves, running it at high RPM's can un-stick them. I can still very FAINTLY hear it...but it is FAINT. So I went to the store and got some MMO and Mobile 1 High Mileage and a new filter. I will change the oil tomorrow with the good stuff and post my results.
It was kinda scary...if it's a rod knock, piston skirt, etc...running it like that will definitely expose that weakness...I was just waitin for her to blow.
Anyway, thought I would share this. This is NOT talked about a lot on the web....but I did find it...and it did work. So far.
03-13-2012, 07:39 PM
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Location: Pasadena, MD
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Year: 1987
Model: Wagoneer
Engine: Renix 4.0
03-13-2012, 07:39 PM
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Location: Frederick, MD from Cleveland, OH
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Year: 1993 YJ Wrangler
Engine: 4.0 I6
03-13-2012, 07:41 PM
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Well, this thread definitely doesn't sit and collect dust like the rest do on here.
03-13-2012, 07:43 PM
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Year: 1997/2000
Model: Cherokee
Engine: both 4.0's
03-13-2012, 07:45 PM
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Location: Frederick, MD from Cleveland, OH
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Year: 1993 YJ Wrangler
Engine: 4.0 I6
03-13-2012, 07:54 PM
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Join Date: Aug 2011
Location: Bowie, MD
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Year: 2000
Model: Cherokee
Engine: 4.0L I6
Yep that was me! I saw you across from the Chevy's, near the 295 entrance right? It didn't click for me either until like 3 minutes later lmfao.