Valve Cover Gasket Replacement - Gunk City.

Reply Subscribe

Thread Tools

Search this Thread

11-26-2013, 02:25 PM

#46

investinwaffles

CF Veteran

Join Date: Oct 2013

Location: Tarpon Springs, FL / Denver, CO

Posts: 2,097

Likes: 0

Received 8 Likes on 7 Posts

Year: '98

Engine: 4.0 I6

I run Rotella T6 all year but have recently started substituting for 1qt of Marvel Mystery Oil. The MMO really quieted down my valve/lifter tick, and it makes the oil turn dark pretty fast.

Recently, before each oil change, I drive the Jeep for 1hr or so, then add .5qt of ATF and let it idle for 30 mins or so. Oil is always black when I change it at 2500 miles.

Hoping that this will help clean out the motor slowly, to avoid any chunks breaking up, but I might try the B12 Chemtool for a more powerful flush after a few more slow-cleaning cycles. The head under the valvecover doesnt look that grungy though.

Reply Like

11-26-2013, 06:26 PM

#47

JDHDrum

Junior Member

Join Date: Nov 2013

Posts: 36

Likes: 0

Received 0 Likes on 0 Posts

Quote:

Originally Posted by Turbo Supra

I was told seafoam is a good solvent when mixed with the oil. I've been told to go the diesel oil route, kerosene, and seafoam. Seafoam seemed to be the most suggested. I'm not sure how aggressive diesel oil will be, and i'm not sure if being more aggressive is necessarily a good thing. I'm open to suggestions...

Before and after photos of this cleaning process and what you used to clean it would be awesome if you are willing.

Reply Like

11-26-2013, 06:43 PM

#48

kgm

CF Veteran

Join Date: Oct 2013

Location: Denver

Posts: 1,589

Likes: 0

Received 1 Like on 1 Post

Year: 99

Model: Cherokee

Engine: 4.0

Quote:

Originally Posted by CCKen

They're all insane.

Use cheap 5W-30 motor oil and a Motorcraft FL1A filter during the desludge process. FL1A only costs about $4.00.

Then switch to Rotella T6, 5W-40, and a Wix 51515 filter after it looks like the desludge oil starts looking clean.

hahahaha

I did a few 2000 mile OCIs when I got the truck to help clean it out a bit. Pretty sketched out doing an ATF flush.

Last edited by kgm; 11-26-2013 at 07:03 PM.

Reply Like

11-27-2013, 11:41 AM

#49

EdZ

Junior Member

Join Date: Nov 2013

Location: Baltimore, MD

Posts: 68

Likes: 0

Received 0 Likes on 0 Posts

Year: 2000

Model: Cherokee

Engine: 4.0L

Quote:

Originally Posted by salad

If your rings suck and let a ton of fuel into the oil, the gasoline has a pretty thorough cleaning action

Now that right there is FUNNY !!! If the rings suck gas it would smoke a bit too as well as have low compression... To get gas into the oil it would require a leaking injector or failed ignition on at least one cylinder...