Identifying An Engine

[jimoshel]

At one time Google was a very useful app for finding things. Due to spam that is no longer the case. Just wasted an hour searching for the following info. What year is a 2.5 Jeep block casting No 3239443, stamped No 406U18? Anybody know? :dunno:  :???:

[88ComancheMitch]

http://street2mud.com/webfiles/AMC%20Engine%20codes.pdf

 

I think this is what you're looking for. About to head back out to work on the truck, stopped for a snack...

[HOrnbrod]

Sure the casting number isn't 3239448? That number shows up in the below, 1983-88:

 

Jeep Block Casting Numbers
Source page for the data in this table
MAKE AND YEAR
C.I.D. LITRE BORE CYL. DESCRIPTION
BLOCK CASTING NUMBER
HEAD CASTING NUMBER
CRANK CASTING NUMBER
AMC
1983-88
150 2.5 3.875 L-4 Eagle, 7/16"
3239448
3244893
3239611
AMC
1988-71
150 2.5 3.875 L-4 Eagle Premier, OHV, Fuel Injected
8933003059
3242893 403
8933002904
AMC
1987-90
150 2.5 3.875 L-4 Fuel Inj., 2.06" Crank Neck, 7/16" Head Bolts, Wrangler
8933004200
408
8933002904
AMC
1986-90
150 2.5 3.875 L-4 Carb., 1/2" Head Bolts, 2.06" Crank Neck, Wrangler
53005532
.
8933002904
AMC
1991-92
150 2.5 3.875 L-4 Fuel Injected, 7/16" Head Bolts, Wrangler
63008403
117
8933002904
AMC
1970-72
232 3.8 3.75 L-6 W/Rocker Shaft, Spec. Flat Back or Flanged Style Crank
3199962
3218618
3189886
3170717
3211040
3172216
3172218
3188947
3204904
AMC
1972-74
232 3.8 3.75 L-6 W/Rocker Shaft, Spec. Flat Back or Flanged Style Crank
3213867
3218618
3222380
3710717
3189886
3211040
3213809
3224490
3214722
AMC
1975-79
232 3.8 3.75 L-6
3224098
3227445
3227258
3241722
AMC
1987-90
241 4.0 3.875 L-6
53005535
8933002665
2686
3003453
AMC
1991-93
241 4.0 3.875 L-6
53008405
7120
3003453
AMC
1970-72
258 4.2 3.75 L-6 W/Rocker Shaft, Spec. Flat Back or Flanged Style Crank
3199962
3211040
3170717
3189886
3199798
RD67703
AMC
1970-72
258 4.2 3.75 L-6 W/Rocker Shaft
3218618
3222380
3213867
3211040
3170717
3214723
AMC
1975-79
258 4.2 3.75 L-6 Spec. Location of Temp. Send. Unit, 1/2" Head Bolts
3227445
3224098
3227258
3214723
AMC
1980
258 4.2 3.75 L-6 Temp. Send. Unit at Top Rear of Head
3235077
3227258
3214723
AMC
1981-85
258 4.2 3.75 L-6 7/16" Head Bolts
3235444
3933000
3224480
3241656
3235477
AMC
1986
258 4.2 3.75 L-6 1/2" Head Bolts
3235444
3933002
3235477
AMC
1987-89
258 4.2 3.75 L-6 2.06" Crank Neck, Spec. if Alum. or Plastic Valve Cover, 1/2" Head Bolts
3235444
3661
3727
AMC
1970-79
304 5.0 3.75 V-8
3195527
3212990
3218086
3233324
RD51261
4487237
3195292
3214724
AMC
1970-78
360 5.9 4.08 V-8 Spec. Stud Type or Bolt Down Rocker Cyl. Heads. Must Have Head Cast #
3195528
3196291
3220502
3231475
3216090
3219993
3233344
RD51261
4487237
3195292
3214724
3214754
AMC
1971-76
401 6.6 4.165 V-8 Spec. Stud Type or Bolt Down Rocker Cyl. Heads. Must Have Head Cast #
3198951
3196291
3219993
3216090
3220502
3231475
3190079
3196921
3214725
3220411
3199842

 

The stamped date mfg. decoder is also in this link:

 

http://www.jeepforum.com/forum/f8/identify-your-engine-1383352/

[jimoshel]

Put on my shoes, grabbed a flashlight , went out and checked. It was, is, an 8. TNX Don