No oil pressure

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Nov 23, 2015 | 02:27 PM

#16

Slim357

Thread Starter

CF Veteran

Joined: May 2012

Posts: 3,004

Likes: 1

From: Wilmington,NC

Year: 1989

Model: Cherokee

Engine: 4.0

Quote:

Originally Posted by Bugout4x4

I would think that the no oil pressure problem caused the broken skirt.

Good point. Do I need replace the engine or just the piston? Piston walls look fine no grooves or scratches.

Nov 23, 2015 | 02:58 PM

#17

Bugout4x4

CF Veteran

Joined: May 2015

Posts: 4,481

Likes: 18

From: Arizona

Year: 97

Model: Cherokee

Engine: 4.0

Quote:

Originally Posted by Slim357

Good point. Do I need replace the engine or just the piston? Piston walls look fine no grooves or scratches.

You are asking a whole can of worms here. lol Do you have this all apart or just pulled the pan to take a look? If you have a broken skirt you are looking at some major work because the rest of the engine may have suffered just as much damage. I would really be concerned about the cam bearings at this point for sure.

Nov 23, 2015 | 04:36 PM

#18

dave1123

Old fart with a wrench

Joined: Nov 2010

Posts: 14,398

Likes: 741

From: Manlius, east of Syracuse, NY

Year: 2000 XJ Sport & WJ Laredo

Model: Grand Cherokee (WJ)

Engine: 4.0L

While you have the pan off, pull a main bearing cap and look at the bearing. If to LOOKS good, use Plastigage and check the clearance. I think Bugz has the right idea. There may be a lot more damage than you think.

Nov 23, 2015 | 07:41 PM

#19

Slim357

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CF Veteran

Joined: May 2012

Posts: 3,004

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From: Wilmington,NC

Year: 1989

Model: Cherokee

Engine: 4.0

Quote:

Originally Posted by Bugout4x4

Pulled the pan unbolted the piston rod as well as the main cap inspected the bearings as well as pushed the number 6 piston up to inspect the bore. If I had a shop to lay the engine out in I would have already pulled and dismantled the engine.