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#1 02-08-2012 10:03:20

Stein
Helper
Registered: 05-27-2009
Posts: 48

6.2l Diesel

Despite better judgment and wisdom from many members of the XJ list, I am looking for a 6.2l diesel.

There are a couple of reasons:

The 6.2 is not a high torque motor and has the same chevy small block pattern as the 2.8l V6
I'm not looking for a high performance engine, as the AX-5 is not a strong transmission, but it will handle the torque a 6.2 puts out.

6.2s are cheap and spares/parts are everywhere. I could easily buy 2-3 motors.

I really would rather not return to the gas 2.8l...

Anybody know of anyone with one?

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02-08-2012 10:03:20

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Re: 6.2l Diesel

#2 02-08-2012 10:04:11

reblam
Enthusiast
Registered: 10-05-2008
Posts: 106

Re: 6.2l Diesel

Don't want to rain on your parade, but.
Grab an umbrella.
The 2.8L V6 does not have a SBC bell pattern.
It has it's own little pattern that AMC chose to use for the AMC 2.5L 4cyl.
Probably fits some others too.
A Pontiac based Iron Duke 2.5L 4cyl DOES have a SBC pattern.

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#3 02-08-2012 10:04:42

Stein
Helper
Registered: 05-27-2009
Posts: 48

Re: 6.2l Diesel

Actually according to what I've read, its the other way around.

AMC chose the small block chevy pattern for the 2.5l because they were using the 2.8l at the time and didn't want to have to re-design another bellhousing.

The 2.8l also shares the bellhousing with the Chevy S-10, which uses the SBC pattern.

GM manufactured the 2.8l with the SBC bellhousing, the motor is the same one that ended up with the Chevy S-10 and Camaro, it also shares the SBC and engine design with the 3.1, 3.4, and 3.8 V6s, which are all GM 60 Degree engines.

Which also share the bolt patterns with the 6.2l SBC

That is just what I am reading though, I may be way off

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#4 02-08-2012 10:05:21

reblam
Enthusiast
Registered: 10-05-2008
Posts: 106

Re: 6.2l Diesel

Sorry, that information is incorrect.
The 2.8L and 2,5L four share the 60degree bell pattern,
NOT the SBC pattern.
The Iron Duke engine does indeed have the SBC pattern.

If the 6.2L uses the 60degree V6 pattern it will bolt up.
I kind of doubt that though.

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02-08-2012 10:05:21

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Re: 6.2l Diesel

#5 02-08-2012 10:07:13

Stein
Helper
Registered: 05-27-2009
Posts: 48

Re: 6.2l Diesel

"The 4.0l and the 2.5l AMCs share many parts but not the bolt pattern of the trans. The 4.0l is the same as the AMC V8s (and 4.2Ls '72 and later). The 2.8l GM V6 and AMC 2.5l share the same small bellhousing pattern, with 6 18mm headed 12mm threaded bolts. The 2.5l GM used in earlier RWD GMs and AMCs uses the Chevy V8 pattern, 6 3/8" USS bolts with 9/16" heads holding it to the trans.
Hope this clears things up a bit!"

What pattern does the Chevy v8s use?

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#6 02-08-2012 10:08:07

Stein
Helper
Registered: 05-27-2009
Posts: 48

Re: 6.2l Diesel

Just wanted to add, I am not doubting you, you no doubt more way more than I do about this. I just wanted to clear my vision about what I've been reading.....


But either way it must be done, for GOOD OF ALL JEEP KIND!
Even if it means a new transmission

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#7 02-08-2012 10:08:56

reblam
Enthusiast
Registered: 10-05-2008
Posts: 106

Re: 6.2l Diesel

I know you're not picking at me.
I was just saying the 2.8L and AMC 2.5L four does not use the SBC pattern.
Which is what I thought you were saying you thought it does.

I just did not want you to buy a 6.2L thinking it would bolt to that SBC pattern of old.
Then find out the 2.8L did not use that pattern.
Now if that 6.2L bolts to the 60 degree pattern you can bolt it up.

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#8 02-08-2012 10:09:31

Stein
Helper
Registered: 05-27-2009
Posts: 48

Re: 6.2l Diesel

All signs point to yes for the 60 degree pattern thus far, heck even the pictures from the rear end of a 6.2 look EXACTLY like the rear end of my 2.5/2.8

I could always go the custom bellhousing route too.

Everyone has done 4bts....I just want to try a 6.2 for the fun of it, and since I'll have some money to throw around in the Air Force after packing most in savings, I thought why the hell not

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#9 02-08-2012 10:10:06

danny
Helper
Registered: 04-11-2009
Posts: 34

Re: 6.2l Diesel

Replace it with a 3.4L. :)

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#10 02-08-2012 10:11:03

Stein
Helper
Registered: 05-27-2009
Posts: 48

Re: 6.2l Diesel

Gas prices are going back up, I want a diesel because I am more experienced mechanically with them, and I despise electronics and EFI above everything else.

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#11 02-08-2012 10:13:31

reblam
Enthusiast
Registered: 10-05-2008
Posts: 106

Re: 6.2l Diesel

Nothing to despise.
Realy, you are trading one form of complexity for another.

Anyway, not picking, flaming etc.
I have had me share of trials and tribulations with gasoline carbs, timing etc.

None of that has been an issue since I swapped the efi in!
same exact engine and trans.
Completely different driving and upkeep experience.

Honestly for what you will spend to get that diesel in there you can get a comparable running driving 4.0L.

I know you won't do that and I understand that is your choice!

Honestly, I like diesel swaps as well as the next guy, not a big fan of swapping in engines that are known to have issues though.

Can you not get the needed parts to finish the 2.0L Diesel swap easier than starting over?

How about a VW diesel?

Mercedes?

I do not carry a high knowledge, but I have heard the 6.2L is not the favorite for swaps and use in general?
Is the low cost because people do not want them the reason you want one?
I realy just wonder what is driving this idea?

Hey, realy don't get uptight about me asking!
I got some serious issues with building strange unwanted vehicles myself!

Anyone have any idea how we fix these issues?

Anyone want a rusty 65 Rambler Ambassador?

$750 for every frikkin thing I got to try and fix the rust bucket!

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#12 02-08-2012 10:20:44

Stein
Helper
Registered: 05-27-2009
Posts: 48

Re: 6.2l Diesel

Well, sadly I cannot fit a 4.0 under my bonnet :( I still want to see a 4.0 diesel though....

Anyways, I chose the 6.2 because in some applications they are reliable, the main reason they are not is because they dislike turbos and changes in compression (oh and that little cooling issue, but that was only compounded by the fact that the military put a turbo on it).

The 2.1l Is harder to do now because I need a different length drive shaft needed for the AX-5, otherwise I would do it, that and the fact that I have to order the rare starter from Europe

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#13 02-08-2012 10:37:41

reblam
Enthusiast
Registered: 10-05-2008
Posts: 106

Re: 6.2l Diesel

I understand.
If a donor would pop up keep in mind the 4.0L can be put in there with a front core support swap.
I know it is said that the firewall is different, but I have heard of people ignoring that rumor and installing one anyway.
Pretty much need a donor Jeep to pull it off easily though!

I'll keep and eye out for any diesel XJs.
I saw one go up at auction local, but it was about 10-15 years ago now!
You never know with a college town what may turn up.

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#14 02-08-2012 10:38:53

Stein
Helper
Registered: 05-27-2009
Posts: 48

Re: 6.2l Diesel

Yeah, I lost contact with the one guy who had one he had rebuilt everything on for a YJ conversion but decided against it....

Hoping he gets back in touch with me: He only wanted $800.00, very reasonable if you asked me.

I'd like to have two Jeeps someday: a diesel and a 4.0 gas, both manual

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#15 02-08-2012 10:39:53

reblam
Enthusiast
Registered: 10-05-2008
Posts: 106

Re: 6.2l Diesel

Do yourself a favor.
If you love stick shift build your driver with one.
Build number tow with an automatic!
I had some real issues with broken bones and not being able to drive stick shift!
We had to reshuffle our whole vehicle supply chain!

If you don't have a significant other to borrow from it could be a double pain!

I finally gave up fall of 2007 and traded off my stick shift Dakota for my Grand Cherokee.
I just could not face the shifting any longer!

Funny thing is that I can drive my American and it does not bother me at all!
Being only an occasional thing, the fun factor overrides the pain factor!
Daily use I still can't do :(

You'd be surprised at how many people who have had to deal with needing an automatic from time to time when they love standard shift!

I thought you had said you found a torn apart diesel, wondered what happened, bummer.

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#16 02-08-2012 10:40:17

Stein
Helper
Registered: 05-27-2009
Posts: 48

Re: 6.2l Diesel

I had, that was what the guy offered, completely rebuilt engine and transmission, and body, but he never responded again.....

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#17 02-08-2012 10:40:53

nads
Rookie
Registered: 05-29-2009
Posts: 89

Re: 6.2l Diesel

$800 around here gets you a running 4.0 that just needs minor work....

if you're gonna drop that much cash, just buy a second one, and use one
for parts....

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#18 02-08-2012 10:43:47

james
Rookie
Registered: 10-05-2008
Posts: 90

Re: 6.2l Diesel

Nope, the 6.2 uses the 90degree pattern. The GM 2.8 uses a very rare 60-degree pattern, and only shares that pattern with the Jeep 2.5, the GM 3.1 V-6, and the GM 3.4 V-6, and GM 2.5l. The flywheel is much smaller than the V-8s, and other, larger GM V-6 engines, so the entire bellhousing and block mounting pattern is much smaller. You couldn't even use an adapter to put the larger engines up to the smaller bellhousing, because of the flywheel sizes.

To rain on your parade further, before you think about swapping bellhousings, the 60-degree engines all use a smaller, finer input shaft spline on the transmission, unlike the typical 10-spline shaft of the larger V-6 and V-8 engines. You'll never find a clutch to hook the larger engine to the small input shaft, and even if you did, you would snap the shaft with too much torque.

If you are just looking for engines to easily bolt into your Jeep, look at the GM 3.1, 3.4, and even the 2.5 4-cyl. out of the S-10s. They are more common than the Jeep engines.

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