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Starting over on my CJ3B

Norcal69 said:
A 2WD pan and oil pickup seems to be the first place to look. You will need to change the oil pump pickup to match the shallower pan.
Take a look at the oil pickup tubes......

4WD oil pickup tube: Melling 259S

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2WD oil pickup tube: Melling 258S


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I did some more digging and found the 2wd pan on Rockauto for $170 shipped. It does appear to be a little bit shallower. I’m cleaning rust out of the tub for the next couple days so I’ll repot back on that soon.

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Is there any reason any 86+ pan could not be re drilled? I understand his aluminum pan is specific to the later automatic transmission.

You want a steel pan or at least a steel skid under the aluminum.
 
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Jw60 said:
Is there any reason any 86+ pan could not be re drilled? I understand his aluminum pan is specific to the later automatic transmission.

You want a steel pan or at least a steel skid under the aluminum.
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It probably could be redrilled. Except a couple holes overlap slightly. Very different gasket, I’m not sure about the rest of the fitting.
 
It's been a couple weeks off the build as we took a trip out west with my Mother in Law and stopped in Denver for a few days to visit grandchildren.

Before I left I received the 2wd oil pan from Rock Auto. I looks a lot shallower on the photos but it's really only about an inch different. I'm sure the 4wd pan is shaped this way (shallow /flat front -- deep sump area) to keep oil on pickup when on extreme angles. I have to decide if I like that better than saving one inch of ground clearance.??????

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Spent a good amount of time over the weekend getting the exterior body cleaned up and killing the rust.

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What are the 4 holes for? They were mostly filled with bondo.

Firewall wasn't to rusty.
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Top of the driver side fender is in bad shape. I had to cut out a big strip (leaves collected and rusted it out) and drilled a bunch of pinholes out to be filled with weld.
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I may have put to much heat into the body as its pretty wavy. Maybe I'll cut a big piece out and try again with less seams.
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Repairs on top of repairs.
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jeep peep69 said:
They make a short front accessory mounting system for the 4.3 it includes a short water pump and harmonic balancer.it shortens the front by a couple of inches.
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I’ve thought about that. Mine is a 2003 with a serpentine belt. The steering pump and alternator would need to be on the same plane. Do you have a link?
 
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Buildflycrash said:
I’ve thought about that. Mine is a 2003 with a serpentine belt. The steering pump and alternator would need to be on the same plane. Do you have a link?
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Wonder how it is in the Astro, can’t imagine they had a ton of room. Of course I’m 200 miles from the Astro..
 
jeep peep69 said:
Check out summit if it’s fits a small block it will fit a 4.3
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Nope, not for an 03. Once the balance shaft came into play the front dress was different.

The snout is also different due to the addition of the reluctor wheel and crank position sensor.
 
is an 03 4.3 that different than a 95 with a balance shaft? I just swapped a 350 in place of a 4.3 and used all the stuff off the front of the 4.3 on the 350 excepting the harmonic balancer.
 
sterlclan said:
is an 03 4.3 that different than a 95 with a balance shaft? I just swapped a 350 in place of a 4.3 and used all the stuff off the front of the 4.3 on the 350 excepting the harmonic balancer.
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There is quite a bit that changed overall between 1985 and 2014.

There is not an 03 350 but an ls based v8 so the 4.3 did not need to share three factories worth of tooling but did need to share design considerations that the new ls motors face.

So the 03 has an aluminum pan with additional transmission mounting bolts, it has a different oil pan, timing chain cover, intake bolting pattern.

And it's not just a year by year change but a fullsize truck motor will be a less refigned motor compared to a smaller car where it is a performance option. Tbi or carburetor and nonbalance shaft compared to cpi with balance shaft in higher trim cars.

Then you have the fun motors. Boats, crates, typhoon & syclone

Car motors have 2 oil galleys and no fuel pump boss. The fun motors have 3 oil galleys, mechanical fuel pump boss, and 4 bolt main bearings.

So for most years you have 3 different blocks.
 
Jw60 said:
There is quite a bit that changed overall between 1985 and 2014.

There is not an 03 350 but an ls based v8 so the 4.3 did not need to share three factories worth of tooling but did need to share design considerations that the new ls motors face.

So the 03 has an aluminum pan with additional transmission mounting bolts, it has a different oil pan, timing chain cover, intake bolting pattern.

And it's not just a year by year change but a fullsize truck motor will be a less refigned motor compared to a smaller car where it is a performance option. Tbi or carburetor and nonbalance shaft compared to cpi with balance shaft in higher trim cars.

Then you have the fun motors. Boats, crates, typhoon & syclone

Car motors have 2 oil galleys and no fuel pump boss. The fun motors have 3 oil galleys, mechanical fuel pump boss, and 4 bolt main bearings.

So for most years you have 3 different blocks.
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but what about the bolt locations for the front end the three in the head and two in the block? the op needs shorter overall length and there are a ton of options for the small block
 
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