Engine I.D. Question, 4.0 or 4.2?

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a_robert_b
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Joined: Sun Mar 10, 2019 5:23 pm

Engine I.D. Question, 4.0 or 4.2?

Post by a_robert_b »

Came across a great deal on a rebuildable engine at a swap meet recently, but can't seem to identify if it is a 4.0 or 4.2 inline 6. I was able to take pictures of the visible codes on the block which I will include, the main ones appear to be:

BV
EF3235444 Cast on the driver's side of the block

A "2" cast on the rear of the block

129 83 Cast toward the front of block on the driver's side


From what I have read online if I had looked at the other side of the block I could have found some more useful numbers, but if anyone knows anything about these codes or can i.d. the engine just by looking at it, I would greatly appreciate it!
ImageImageImage
Last edited by a_robert_b on Wed Mar 13, 2019 5:27 pm, edited 1 time in total.
1983 j10 Sportside
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Cecil14
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Re: Engine I.D. Question, 4.0 or 4.2?

Post by Cecil14 »

What does the intake side of the head look like? The 4.0L will have notches above the intake ports for the injectors, where the 258 will just be the intake ports themselves. This article gives a pretty decent overview of the various 4.0L heads, and should let you either ID one of those or rule them out. If it is not one of these, then it is likely a 258:

https://www.enginebuildermag.com/2004/1 ... der-heads/

What do the front accessories look like? V-belts or serpentine? Does it have a distributor?


aa
1983 J-10 - 4.6L(MPFI)/CS130D/Hydroboost/NV3550/D300/44/44/3.54/Disc-Disc/32s/42 gallon 'burb tank
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Stuka
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Re: Engine I.D. Question, 4.0 or 4.2?

Post by Stuka »

It should be noted, it may not be either. It could very well be a 232.

Need some photos that are from farther away, and see the intake/exhaust side like Cecil states.
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Pevious Jeeps: 1981 J10, 1975 Cherokee, 2008 JK, 2005 KJ, 1989 XJ
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babywag
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Re: Engine I.D. Question, 4.0 or 4.2?

Post by babywag »

google search casting# says it's a 258
-Tony
'88 GW (aka Babywag)
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