4.2 pan fit on 4.0?

Stallacrew

NAXJA Forum User

Location

Cullman, Alabama

• Sep 15, 2008

• #1

Long story, crossthreaded the pan plug on my 4.0, have an extra 4.2 pan, and I wanna get rid of the leak. I have my TC cover off and it would be easy to swap right now.

Can I use a 4.2L pan on my 4.0?

--Alex

 

Justpunchit

NAXJA Member #1291

Location

Jaffrey, NH

• Sep 15, 2008

• #2

Well it should fit, but heres my confussion.... if you crossthreaded the pan bolt the problem wouldn't be your oil pan because of the fact that it bolts into the block. Sounds to me like you should just chase the threads in the block so it threads in correctly again, but then again maybe I just misread it.

 

Stallacrew

NAXJA Forum User

Location

Cullman, Alabama

• Sep 15, 2008

• #3

No not the pan bolt, just the PLUG bolt...drain plug that is. It's crossthreaded and leaks.

 

Sherman_thetank

Keep it pinned!

Location

omaha, NE

• Sep 15, 2008

• #4

i think he means the drain plug for the oil pan, as far as i have read the blocks are pretty much the same just different rotating assemblies.

 

cal

NAXJA Forum User

NAXJA Member

Location

Hammertown, USA

• Sep 15, 2008

• #5

IIRC, the 4.2 pan had a smaller sump?

 

X

XJMarty

NAXJA Forum User

Location

Czech Republic

• Sep 15, 2008

• #6

it does not fit, we tried :scared:

 

ECKSJAY

Water is dirty

Location

Covington, WA

• Sep 15, 2008

• #7

cal said:

IIRC, the 4.2 pan had a smaller sump?

Click to expand...

Yeah, I think that's what it was. The gaskets are the same...but the pans are NOT.

 

5-90

NAXJA Forum User

Location

Hammerspace

• Sep 15, 2008

• #8

XJMarty said:

it does not fit, we tried :scared:

Click to expand...

Too narrow? Any idea what year your 258 pan was from? I do believe they changed to a wider block ca. 1975, which is why I'm asking...

 

92DripCherokee

NAXJA Forum User

Location

Tampa, Florida

• Sep 15, 2008

• #9

i had YJ's 4.2 oilpan on my reman engine when it came out the shipping crate. they do bolt up.

unfortunately the front axle chewed into the "chin" of the pan and no amount of prying on ithe pan's skidplate would give enough clearance for full axle travel.


In addition to the skidplate bonded to the pan, the sump was set farther forward. The pumpkin on the front axle chewed into the corner of the pan. But a few dents from a hammer and it might work...

 

Last edited: Sep 15, 2008

X

XJMarty

NAXJA Forum User

Location

Czech Republic

• Sep 15, 2008

• #10

it was 198? grand waggy