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OrangeXJ
10-21-2011, 06:32 PM
As some of you know I got a 97 TJ with 89k on the odometer. I was driving down the highway at 55 and slowed down to about 10 to make a turn and BAM one hell of a knocking noise and smoke every where. Well we pulled the engine out today to find a hole in the block. The rod cap was still in place not locked up and the piston was in good shape. And could see cross hatching in the cylinder. The rod broke and know body knows why.

http://i335.photobucket.com/albums/m470/GregKnowles/Picture086-3.jpg

http://i335.photobucket.com/albums/m470/GregKnowles/Picture087-1.jpg
dagr8tim
10-21-2011, 06:37 PM
JB Weld it up and go another 100K.

Seriously, sounds like it's time for a stroker.
OrangeXJ
10-21-2011, 06:48 PM
JB Weld it up and go another 100K.

Seriously, sounds like it's time for a stroker.

Strokers are over rated. Have friends that did it and were not pleased with the amount of money spent / performance
Carves
10-21-2011, 07:26 PM
Maybe there was a flaw in the casting from when it was made ??

Any dark, old, staining .... in the areas indicated by the yellow arrows ??

... as that would indicate a crack that been there a while ...



http://i1143.photobucket.com/albums/n629/carves-oz/Vehicle%20Bits/BrokenRod01a.jpg
dagr8tim
10-21-2011, 07:38 PM
How many miles on the engine is my question.
XJ4IV
10-21-2011, 07:48 PM
damn wranglers.... see Jeep put the manufacturer flawed motors in wranglers... Greg I hope you anticipate dropping a cherokee motor in that thing!
dagr8tim
10-21-2011, 07:56 PM
damn wranglers.... see Jeep put the manufacturer flawed motors in wranglers... Greg I hope you anticipate dropping a cherokee motor in that thing!

They started building faults into them because the early ones were so reliable.
OrangeXJ
10-22-2011, 04:23 AM
Maybe there was a flaw in the casting from when it was made ??

Any dark, old, staining .... in the areas indicated by the yellow arrows ??

... as that would indicate a crack that been there a while ...



http://i1143.photobucket.com/albums/n629/carves-oz/Vehicle%20Bits/BrokenRod01a.jpg

Nothing to indicate an existing crack
OrangeXJ
10-22-2011, 04:24 AM
how many miles on the engine is my question.

89,620
OrangeXJ
10-22-2011, 04:26 AM
damn wranglers.... see Jeep put the manufacturer flawed motors in wranglers... Greg I hope you anticipate dropping a cherokee motor in that thing!

It's a good posablity that the rebuilt long block came out of Camerons XJ
cantab27
10-22-2011, 04:29 AM
that sucks greg,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Jarlaxle
10-22-2011, 05:42 AM
Bummer. :(
4.3LXJ
10-22-2011, 10:40 AM
Bummer. But it looks very salvageable with a new rod and a set of rings. If that is you can plug that hole. Could be done I think with some nickel rod.
dagr8tim
10-22-2011, 11:59 AM
Bummer. But it looks very salvageable with a new rod and a set of rings. If that is you can plug that hole. Could be done I think with some nickel rod.

JB Weld, it'll hold together.


Or take this as a sign that's it's time for SBC.
Showtime3492
10-22-2011, 12:57 PM
I could never just rebuild a 4.0 they are awesome overall for their durability but not worth just a general rebuild unless there were some goodies thrown in the mix. Id just pluck one out if the local yard and go home and drop it in and be done before rebuilding one lol. That sucks on the luck with that..
702XJCruiser
10-22-2011, 02:40 PM
That's crazy with such low mileage.
BlueXJ
10-22-2011, 03:49 PM
I have rebuilt the 4.0L before and gone near 200,000 miles on the rebuild.

I have seen welded cast iron blocks too and most will hold up for many years but I am not advocating that you do either. It is dependent upon your time, tools and skills.
XJ4IV
10-25-2011, 12:34 AM
thats an AWFULLY big hole to throw some JB onto... were not just closing a hole... the hole will be under a decent amount of pressure as well... and Ive seen that JB weld doesnt really enjoy hanging out with motor oil... they can play in a room together ...just not with the same toys!
xjrev10
10-25-2011, 03:02 AM
I could never just rebuild a 4.0 they are awesome overall for their durability but not worth just a general rebuild unless there were some goodies thrown in the mix. Id just pluck one out if the local yard and go home and drop it in and be done before rebuilding one lol. That sucks on the luck with that..

This is what I would do.
OrangeXJ
10-25-2011, 03:24 AM
This is what I would do.

I got a re built long block with a 3 year warenty
dagr8tim
10-25-2011, 07:38 AM
thats an AWFULLY big hole to throw some JB onto... were not just closing a hole... the hole will be under a decent amount of pressure as well... and Ive seen that JB weld doesnt really enjoy hanging out with motor oil... they can play in a room together ...just not with the same toys!

JB Weld was a joke. I'd never ever consider that with something like the hole in that block.

Honestly, 4.0's are fairly cheap and plentiful. I'd throw another one in and keep on truckin'.
Mudderoy
10-25-2011, 11:19 AM
JB Weld was a joke. I'd never ever consider that with something like the hole in that block.

Honestly, 4.0's are fairly cheap and plentiful. I'd throw another one in and keep on truckin'.

Of course it's a joke who in their right mind would think you could JB Weld a block?!?!?! Now you'd need to let it set up for a week, but you could JB Weld that rod back together. :timeout: