oil pan, replace or patch up

garr · Oct 11, 2015

I'm prepping my 01 XJ for winter, removing rust from anywhere I find it & applying POR15 to end it for good.
My question is about the oil pan, it has a few bad rust spots, no where is oil leaking through but a few spots seem thin after removing the flaking rust, should I spread some JB weld over the spots in question, prep/paint with the POR 15 & be done with it or should I replace the pan?
Do all pans for the Jeep 4.0 Fit?
If I replace the pan should I use an aftermarket pan or OEM ?
EBAY Is full of pans, some have an "oil sensor hole", can I plug it?
Thanks for answers in advance.

ehall · Oct 11, 2015

I would buy another, less effort better results

Hypoid · Oct 11, 2015

If you try to patch the old pan, those this spots will always be in the back of your mind.

lazyxj · Oct 11, 2015

Find a good used OEM pan, the aftermarket pans fit poorly.
I bought a Dorman pan that needed half of the mounting holes filed to fit.
It would be a good time to change the RMS.

DieselSJ · Oct 12, 2015

lazyxj said:
Find a good used OEM pan, the aftermarket pans fit poorly.
I bought a Dorman pan that needed half of the mounting holes filed to fit.
It would be a good time to change the RMS.

^^This^^

87manche · Oct 12, 2015

if those spots eventually start to leak, your JB weld patch will fall right off.

the oil creeps under it and then it loses adhesion. BTDT.

replace the pan, and yes, great time to do the RMS.

garr · Oct 21, 2015

87manche said:
if those spots eventually start to leak, your JB weld patch will fall right off.

the oil creeps under it and then it loses adhesion. BTDT.

replace the pan, and yes, great time to do the RMS.

I already picked up a good quality used pan, my RMS is good with no leaks, funny thing is before I replaced the RMS the underside of the jeep was covered in oil but I had no rust anywhere!
I think next time I'll leave it leaking, rust is a bitch!

Miller88 · Oct 21, 2015

I need to replace my oil pan gasket.

But dropping the oil pan on these is too much of a PITA. And I'll be deeply saddened by what I find in the oil pan. So, for now, it leaks.

garr · Oct 21, 2015

Miller88 said:
I need to replace my oil pan gasket.

But dropping the oil pan on these is too much of a PITA. And I'll be deeply saddened by what I find in the oil pan. So, for now, it leaks.

After 140K I was shockingly surprised by what I found in my oil pan, The Pan & Engine were SPOTLESS, Brand New Looking, Using Synthetic oil & good filters really makes a difference.
Now for the real Surprise. There was a Hydraulic Lifter in the bottom of the Pan, It must have been dropped there during assembly @ the Factory, Good old American Quality Control, Chrysler included an extra lifter in case I needed one :dunce: Free of charge!!

garr · Nov 13, 2015

I'm about to replace the pan, I haven't done this is over 10 years & I forget, Do I need to use any RTV, I have the nice blue felpro gasket.
Thanks
Frank

Euology101 · Nov 13, 2015

garr said:
I'm about to replace the pan, I haven't done this is over 10 years & I forget, Do I need to use any RTV, I have the nice blue felpro gasket.
Thanks
Frank

With the felpro you do not want to use any RTV. or gasket helper. If it is a 2 piece or 4piece, then you want a pea-sized spot on the connections between the pieces, to fill the 90 degree corners, and nothing else.

This was how I did my 2piece, and it has been leak free.

SPSERG · Nov 16, 2015

Damn, I remember when I started working on mine... I started cleaning it up for paint, and it literally stated to "bleed" oil. Granted, mine is an 88 but I took the opportunity to change the motor mounts and the oil pump (not that it needed a pump). Got a pan from autozone, and haven't had an issue since.

87manche · Nov 17, 2015

go buy the relevant "oil pan snapups" at the parts store.

trust me, I just saved you 30 minutes of cursing.

xcm · Nov 17, 2015

"Alignment pins" work too, you can use the stock bolts and just cut the heads off.

Also, pretty sure the felpro instructions call for dabs of RTV at the corners... only downside is that it can tear your nice blue gasket on dissasembly if your not carefull.

garr · Nov 19, 2015

Do you guys prefer RTV or something like Loctite 518 in the 4 corners where sealant is required ?

Miller88 · Nov 26, 2015

garr said:
After 140K I was shockingly surprised by what I found in my oil pan, The Pan & Engine were SPOTLESS, Brand New Looking, Using Synthetic oil & good filters really makes a difference.
Now for the real Surprise. There was a Hydraulic Lifter in the bottom of the Pan, It must have been dropped there during assembly @ the Factory, Good old American Quality Control, Chrysler included an extra lifter in case I needed one :dunce: Free of charge!!

Chunks of aluminum came out last oil change ...

oil pan, replace or patch up

garr

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