Casting #s/ ID/ 4.0 block - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 12-19-2000, 03:24 PM Thread Starter
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Casting #s/ ID/ 4.0 block

Does anyone know the casting number(s) for a '91-'95 4.0 block?

TIA



-raymo
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post #2 of (permalink) Old 12-19-2000, 05:24 PM Thread Starter
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Re: Casting #s/ ID/ 4.0 block

ttt w/new title.

-raymo
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post #3 of (permalink) Old 12-19-2000, 09:38 PM
 
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Re: Casting #s/ ID/ 4.0 block

The number on a 1991 - 1993 4.0 block is 53008405

JAF
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post #4 of (permalink) Old 12-20-2000, 03:30 AM Thread Starter
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Re: Casting #s/ ID/ 4.0 block

Thanks again Jaffer...

I didn't realize that the block would have changed for '94/95. That block should work as well, do you know the casting number(s) for it?

I am going to end up having the block over bored .030 (since it is used), getting custom pistons, 4.0 rods (weight balanced), 4.2 crank for a 4.6 stroker engine.

This is the result of a piston or piston ring failing in my block. The block had passed compression tests with flying colors prior to the 4.0 head swap. I am guessing that all of the add'l power caused a weak link to go. The block was a reman. block with about 20K miles. I understand the company who reman'd the block (Bonded) went out of business due to so many warranty returns.

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post #5 of (permalink) Old 12-20-2000, 07:57 AM
 
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Re: Casting #s/ ID/ 4.0 block

The listings I have end in 1993 so I can not confirm if there was a change in 1994 or not.
Sorry to hear you lost your bottom end. Fun while it lasted, eh?
Just make sure you get the right pistons and double check your piston top to deck clearance at TDC during your rebuild just to make sure.
I strongly recommend you have the whole rotating mass balanced prior to assembly .. including the harmonic balancer, flywheel and clutch pressure plate.
It only costs around $150 to have this done.
Investing in a new set of ARP rod bolts are also a good idea.
These two upgrades can make the difference between a smooth, high revving, stay together mill and just a pretty good one.

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