what year is my 4.0 liter?

[mesha]

I bought a bunch of stuff from novak to get my np435 in there and the hold up is on the CPS. I don't know what year my motor is. The jeep is a 91, but the motor is a newer swapped in 4.0 liter. How do I tell what year it is? I need to get the machine work done on the bell housing. thanks

p.s. I didn't swap in the motor.

 

[STAG]

Pull off the valve cover, the year should be embossed in between the 2nd and 3rd cylinder valves iirc

 

[Tacoma]

really?? that's pretty handy if they just put the year right there! no looking up casting codes.

 

[DOSS]

really?? that's pretty handy if they just put the year right there! no looking up casting codes.

I would rather look up casting codes if that thing is installed in an XJ at least

 

[Tacoma]

any engine I deal with has casting codes or CPL tags. woo hoO! 4.0 slam!

 

[Cascadia]

I've got a 93 Wrangler if I look up from below just under the exhaust manifold I can see a date on the block. My 93 wrangler has an engine that was made on 12/18/92. I'm guessing you should have something similar there, at least a year.

 

[mesha]

from what I searched it can be found by pulling the valve covers, but I would rather not.

numbers on my engine
53008405 D N 4.0L -4 4.9.91
the first number tells me it was between 91and 95
the letters I don't know
the 4.0L explains itself I don't know what the -4 means
the 4.9.91 looks like the date to me, but I didn't know engines were injected in 91 I was told this was a newer motor when I bought it. any ideas?

 

[Caleb]

from what I searched it can be found by pulling the valve covers, but I would rather not.

numbers on my engine
53008405 D N 4.0L -4 4.9.91
the first number tells me it was between 91and 95
the letters I don't know
the 4.0L explains itself I don't know what the -4 means
the 4.9.91 looks like the date to me, but I didn't know engines were injected in 91 I was told this was a newer motor when I bought it. any ideas?

I think 91 was the first year of injection for wranglers...however my Jeep tech is a little rusty, It's been a while since I cared

...or maybe it was 92

 

[mesha]

I think 91 was the first year of injection for wranglers...however my Jeep tech is a little rusty, It's been a while since I cared

...or maybe it was 92

looks like they were injected in 91. Maybe it isn't a newer motor.

 

[bryson]

91 was the first year for a 4.0 on a YJ... they were in XJ/MJ since 87. The 5200xxxx number you're looking at is a chrysler part number, and to my knowledge you can't decode those to figure out a year, so don't trust that.

I'd go with the 4.9.91 as a date and call it good.

 

[mesha]

called novak and told them 91 so we will see. thanks for the help.

 

[STAG]

I think 91 was the first year of injection for wranglers...however my Jeep tech is a little rusty, It's been a while since I cared

...or maybe it was 92

X2.... '87-'90 XJ/MJ had the "Renix 4.0 (first gen Multi-Port Fuel Injection"
'87-'90 YJ 4.2L carburated I-6
'91-'95 YJ - High Output 4.0
'91-'01 XJ - High Ouput 4.0


Between the years of 1987-2006 over 5 million jeep 4.0L inline 6 engines were made and put into XJ Cherokees, MJ Comanches, YJ Wranglers (1991-1995), TJ Wranglers (1997-2006) (technically no 1996 model of wrangler,) ZJ Grand Cherokees (1993-1998?)