oil system issues
CF Veteran
Joined: Jun 2011
Posts: 1,023
Likes: 1
From: Southern Idaho
Year: 1994
Model: Cherokee
Engine: 4.0 L/242 CID I-6 High Output MFI
You should see oil fling up in little droplets from the valves and land on the valve cover with the fill cap off when you hit the throttle. If there is no oil getting up there, then you may need a pump or you have some wicked blockage. I'm surprised your valves aren't seized yet from getting no oil. This must be either recent or they're getting some oil.
Last edited by 94JeepCherokeeMan; Jun 28, 2013 at 10:02 AM.
CF Veteran
Joined: Aug 2009
Posts: 5,676
Likes: 301
From: WV
Year: '96
Model: Cherokee
Seasoned Member
Joined: May 2013
Posts: 448
Likes: 0
From: Sucka Free East Bay Cali
Year: 2000
Model: Cherokee
Engine: 4.0
I think mmo is kerosine, red dye, and a viscosity enhancer. Look at the msds and make your own judgment. Don't get me wrong though, I'm runnin a quart of the stuff right now just before an oil change.
::CF Moderator::
Joined: Aug 2011
Posts: 43,971
Likes: 1,578
From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
Whatever it is, it works great and has been around for decades. No reason whatsoever to avoid it.
CF Veteran
Joined: Jun 2011
Posts: 1,023
Likes: 1
From: Southern Idaho
Year: 1994
Model: Cherokee
Engine: 4.0 L/242 CID I-6 High Output MFI
If you've got oil up there, then you're okay. It's not like an ounce or two is going to end up on your valve cover in a few seconds. If you are getting oil up there, then your engine flushing may have helped or there is a different problem. If they are looking burnt and you have oil, I would guess your valves aren't seating and sealing properly. Is it just one or two valves that look burnt or is it the whole valvetrain?
::CF Moderator::
Joined: Aug 2011
Posts: 43,971
Likes: 1,578
From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0