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Unread 06-01-2013, 09:46 AM   #1
BassMasterCHS
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Which engine block would you use?

I have a 1988 4.0 with supposedly 80k miles on it. It's been sitting outside for about 6 months. I was told it ran fine.

The engine in my jeep has 240k miles on it and lost compression in cylinder 5 because the top edge of the piston has a chunk missing. It's had a main being knock too

It's my understanding there are not any changes in the cast of the 88 block and the 93 block.

I'm going to rebuild the entire engine which ever block I use. What are your thoughts?

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Unread 06-01-2013, 12:48 PM   #2
BigBadWuf
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Yes it will work, i helped a friend put an 88 motor in a 92.
But you must use the intake, flywheel, all sensors,throttle body, and distributor from the jeep the motor is going in. The only real snag we hit was how the coil bolts to the block, only one bolt hole lined up, which apparently didnt give the coil a good ground. So we had to hook a ground strap from the coil bolt to the head.
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Unread 06-21-2013, 06:57 AM   #3
BassMasterCHS
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Quote:
Originally Posted by BigBadWuf View Post
Yes it will work, i helped a friend put an 88 motor in a 92.
But you must use the intake, flywheel, all sensors,throttle body, and distributor from the jeep the motor is going in. The only real snag we hit was how the coil bolts to the block, only one bolt hole lined up, which apparently didnt give the coil a good ground. So we had to hook a ground strap from the coil bolt to the head.
Thanks for the input man. Picking up the rebuilt today from the machine shop.
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Unread 06-22-2013, 07:55 PM   #4
BassMasterCHS
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On my 88 block there isn't one hole for the coil... oh boy.
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Unread 06-22-2013, 09:53 PM   #5
Tom95YJ
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The 93 has a better block. GO to Clifford, Or 505 Performance for a Stroker Kit get a nice cam and head while your at it since your tearing it down rebuild it with a stroker
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Unread 06-22-2013, 09:56 PM   #6
BassMasterCHS
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Too late, 88 block is ready to drop into my jeep....
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Unread 06-23-2013, 06:11 PM   #7
thedude30425
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Damn, You work fast!
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Unread 06-23-2013, 06:42 PM   #8
Motorcharge
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Not sure if you care, but technically an 88 motor in a 93 is a federal felony.
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Unread 06-23-2013, 06:58 PM   #9
BassMasterCHS
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Not sure if you care, but technically an 88 motor in a 93 is a federal felony.
??
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Unread 06-23-2013, 07:01 PM   #10
Tom95YJ
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Originally Posted by BassMasterCHS View Post
??
Federal law states. A vehicles engine must be of the same year or newer. Thus an engine from a 88 in a 93 will be illegal


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Unread 06-23-2013, 07:04 PM   #11
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as long as he uses all the 93 smog equipment I think he will be fine
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Unread 06-23-2013, 07:10 PM   #12
Motorcharge
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Quote:
Originally Posted by BassMasterCHS View Post
??
Quote:
Originally Posted by Tom95YJ View Post
Federal law states. A vehicles engine must be of the same year or newer. Thus an engine from a 88 in a 93 will be illegal


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This. The odds of getting caught on it anywhere outside of CA are pretty damn low, but it's something to be aware of.
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Unread 06-23-2013, 07:45 PM   #13
BassMasterCHS
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Huh, I can't see the difference... Specs are going to be the same and I will be using the same smog equipment. Same head too, which I would imagine makes the difference.
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Unread 06-23-2013, 07:46 PM   #14
BassMasterCHS
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What was the law intended to accomplish?
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Unread 06-23-2013, 07:55 PM   #15
Motorcharge
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Originally Posted by BassMasterCHS View Post
Huh, I can't see the difference... Specs are going to be the same and I will be using the same smog equipment. Same head too, which I would imagine makes the difference.
88 is Renix era, less o2 sensors, different smog system, different exhaust, no on board diagnostic, ect, ect.

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What was the law intended to accomplish?
Overall reduction of emissions, which it doesn't accomplish at all. It's asinine and pointless burdensome regulation, but still something to be aware of in general.
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