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4.0L 1998 and 2002 Both w/4WD       #: 2562
 Moderated by: Mike69, MaDMaXX,
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 Posted: Sun Jul 17th, 2022 05:52 pm
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deeretrax
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Well, my 2002 Ranger 4.0L has over half a million original miles on it and I plan a complete OVH soon. I also have a chance to buy a 1998 Ranger 4WD with same
at a pretty cheap price. The 98 model is a std transmission and pretty much a rusted-out body Etc. I'm looking at the engine as a core to build, have ready for a quick
swap but was wondering about the compatibility, any difference in the block etc.

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 Posted: Mon Jul 18th, 2022 01:09 am
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JAMMAN

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Unless someone did a swap the 4.0 in your 98 is a OHV version. IMO a MUCH better engine than the 4.0 SOHC though the SOHC version had a couple more horsepower. If you like pulling the motor every 100K miles to replace front and rear timing chains and guides the newer 4.0 is for you!

The Ranger used the OHV through 2000 and every 2001 made be it in 2000 or 2001 had the SOHC.

I'm not sure about the transmission mounting or engine mounts but effectively they are 2 different engines. Being the transmission is electronically controlled you will have to use the newer ECU and I don't think the sensors are the same on the 98. There are enough differences I wouldn't attempt it myself, there are people on here that know MUCH more than I do about the block bolt patterns I hope they chime in.



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 Posted: Tue Jul 19th, 2022 01:47 am
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deeretrax
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Thanks Jamman,
I'm figuring that the 4.0L litre that your talking about will not be a fit. Probably close but no cigar. I'll keep looking for a suitable core.

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 Posted: Fri Nov 18th, 2022 04:55 am
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deeretrax
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I never did find a suitable engine core so now I'm doing my own.

I was planning to do it next month any way, but timetable advanced a little on me today. My 2002 timing chains finally bit it this morning.
My truck has 518,000. original miles. I bought the master engine kit along with a set of rebuilt heads last year and I have all the parts set aside 
for this day. Now it's time to put it all to use. 

I could swear I saw a post on here or another forum one time where a guy posted he's got 530K original on his Ranger. That post made me delay 
mine for a year to see if I could do that. I would say the mission was 95% accomplished. Have a great T-Day people.

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