Maryland Cherokee Club
CF Veteran
Joined: Feb 2012
Posts: 1,036
Likes: 0
From: Mt Airy, MD
Year: 1997/2000
Model: Cherokee
Engine: both 4.0's
Funnier story, i noticed that i have been leaking a little coolant by the water outlet on the head. Assumed that it was the gasket i could never get right. Well, i hadnt driven the jeep since i got home at six so i figured it was enough time to let it cool. I look at the hose, and i can tell it is the hose that is leaking. So i give a little tug. Mind you i said a LITTLE TUG and POP... hot coolant everywhere... all over my hand... my pinkie is on fire and i dont have anymore coolant... damn...
CF Veteran
Joined: Nov 2010
Posts: 5,151
Likes: 0
From: glen burnie md
Year: 2000
Model: Cherokee
-i'll sacrifice-n-take it off yer hands--
)-----you told him!!
Last edited by gone4x4; Mar 13, 2012 at 07:24 PM.
CF Veteran
Joined: Dec 2011
Posts: 4,006
Likes: 1
From: Pasadena, MD
Year: 1987
Model: Wagoneer
Engine: Renix 4.0
CF Veteran
Joined: Mar 2009
Posts: 7,996
Likes: 0
From: Berea, OH
Year: 1998
Model: Cherokee
Engine: 4.0
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.
CF Veteran
Joined: Mar 2009
Posts: 7,996
Likes: 0
From: Berea, OH
Year: 1998
Model: Cherokee
Engine: 4.0
CF Veteran
Joined: Feb 2012
Posts: 5,153
Likes: 0
From: Crofton, MD
Year: 1992
Model: Cherokee
Engine: 4.0 I6, 62mm BBK Throttle Body w/ 1" Spacer, Rusty's Airtube w/ 9" K&N Conical
CF Veteran
Joined: Jul 2011
Posts: 3,235
Likes: 2
From: Elkton, Maryland
Year: 1998
Model: Grand Cherokee
Engine: 4.0
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.
What time are you available Thursday???
CF Veteran
Joined: Dec 2011
Posts: 4,006
Likes: 1
From: Pasadena, MD
Year: 1987
Model: Wagoneer
Engine: Renix 4.0
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.
CF Veteran
Joined: Dec 2011
Posts: 4,006
Likes: 1
From: Pasadena, MD
Year: 1987
Model: Wagoneer
Engine: Renix 4.0
I would like to make sure that the guy with the upside down rack knows that we are just messing with him. Not to take our easily flung **** too seriously...
I think i have a stuck lifter... or valve clatter... what do you think?
I think i have a stuck lifter... or valve clatter... what do you think?
CF Veteran
Joined: Feb 2012
Posts: 5,153
Likes: 0
From: Crofton, MD
Year: 1992
Model: Cherokee
Engine: 4.0 I6, 62mm BBK Throttle Body w/ 1" Spacer, Rusty's Airtube w/ 9" K&N Conical
Well....I fixed his roof rack. Just need to figure something for his Cherokee now....
Senior Member
Joined: Mar 2011
Posts: 693
Likes: 0
From: Lexington Park, MD
Year: 2000
Model: Cherokee
Engine: 4.0L I6
Senior Member
Joined: Mar 2011
Posts: 693
Likes: 0
From: Lexington Park, MD
Year: 2000
Model: Cherokee
Engine: 4.0L I6
