New Comanche Owner

[Southpaw26]

Just wanted to say hello to everyone. I recently acquired a 1988 Jeep Comanche Pioneer 4x4 automatic with a 4.0 engine. Very excited to begin fixing this Comanche up. Seems to be a very solid truck. I was told that the truck had a 1999 model engine installed. I have the engine code on the front of the motor but don't know if it is indeed a 1999 engine. Any help on this would be great.

 

 

Trace 53011187 M2ZJ

 

9 187 7918 324936

PLT B/CODE YR DATE SEQ NUM

[Comanche County]

Does it have a complete HO conversion or did they just replace the block?

[87jeepmj]

The last to letters ZJ means it came out of a grand cherokee which also means it is pre 1999

[87Warrior]

The last to letters ZJ means it came out of a grand cherokee which also means it is pre 1999

Unless of course, the valve cover was swapped ;)

[HOrnbrod]

Look over the block for the casting number. It's a much more accurate way to tell what it is (was).

 

Year Casting No

1987-90 53005535

1991-95 53008405

1996-98 53020569

1997-?? 53010341

1999-04 53010449

2000UP 53010328 (2000+ wrangler/XJ)

2000UP 53020569 (2000+ Grand Cherokee)

[87jeepmj]

 

Unless of course, the valve cover was swapped ;)

that is true

[Southpaw26]

Ok how would I know if it is compete HO? What year did the HO become available?

[ftpiercecracker1]

Is the throttle body mounted using 4 hex head bolts or 3 large torxs bolts?

 

some pictures would help as well.