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Unread 02-21-2014, 02:15 PM   #1
Oldmx
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1987 YJ Restoration

Hello,

I am new to this forum and am looking for some information. I am restoring my 1987 YJ, which I took apart 3 years ago and am now trying to remember how to put it back together. My engine block was shot so I purchased a block from a wrecking yard which has a casting number of EF323544 and a build number of 301C26. The first number puts it in the 258 family and the second number appears to make it a block built on January 26 1983 is this correct?

If the above is correct do I need to find an alternator bracket from a 1983 CJ since my 1987 one is giving me fits in trying to re-attach it. It also appears that my serpentine belt for my 87 is now too long for the pulleys. Could this be correct or am I loosing my mind?

Thanks for your replies.

Mike

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Unread 02-21-2014, 03:41 PM   #2
BlueRubiconrich
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87-88 had bad trannys I'd swap it out for a later Tranny/Tcase
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Unread 02-21-2014, 04:02 PM   #3
superj
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Only bad trannies for standards trans. My 87 auto trans is badass.

I am not sure on the block and alt mount but I can put a pick of how it mounts in a bit but my block is a 98 block
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Unread 02-22-2014, 08:08 AM   #4
Rproject
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Serp belt on an '87? I thought all 87's were v-belt. As well as all CJ 258's.
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Unread 02-22-2014, 08:19 AM   #5
jsawduste
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Quote:
Originally Posted by BlueRubiconrich View Post
87-88 had bad trannys I'd swap it out for a later Tranny/Tcase
Quote:
Originally Posted by superj View Post
Only bad trannies for standards trans. My 87 auto trans is badass.

I am not sure on the block and alt mount but I can put a pick of how it mounts in a bit but my block is a 98 block
How in the hell do you guys jump from a original post asking about accessory drives and belts to bad transmissions ? I swear this place has a serious lack of reading comprehension and common sense.

I like what another poster once said "nothing but a bunch of parrots".
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Unread 02-22-2014, 08:24 AM   #6
Oldmx
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I think I have the alternator problem solved. Trying to find the correct oil filter was a pain until I figured out the block was from a 83 and not an 87. Rproject my jeep does have a serpentine belt must have switched when the YJ was first produced, mine is a first year. Going to work on it some more this weekend hoping to get it to the point where I can put the tub back on.

Mike
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Unread 02-22-2014, 08:27 AM   #7
jsawduste
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Quote:
Originally Posted by Oldmx View Post
Hello,

I am new to this forum and am looking for some information. I am restoring my 1987 YJ, which I took apart 3 years ago and am now trying to remember how to put it back together. My engine block was shot so I purchased a block from a wrecking yard which has a casting number of EF323544 and a build number of 301C26. The first number puts it in the 258 family and the second number appears to make it a block built on January 26 1983 is this correct?

If the above is correct do I need to find an alternator bracket from a 1983 CJ since my 1987 one is giving me fits in trying to re-attach it. It also appears that my serpentine belt for my 87 is now too long for the pulleys. Could this be correct or am I loosing my mind?

Thanks for your replies.

Mike
Mike,
like Rproject I was under the impression that serp. belts did not come out until the major changeover in the 90/91 model year. Allow me to do some research to see if that is indeed true. One quick way is to see if the harmonic balancer bolt is even with the balancer body when the balancer itself is fully seated.

Could it be possible that the engine your ultimately scrapped was not the original ?

To be clear are there two problems ?

One the alternator bracket and the other being the extra long belt ?
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Unread 02-22-2014, 08:33 AM   #8
Rproject
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Quote:
Originally Posted by Oldmx View Post
Rproject my jeep does have a serpentine belt must have switched when the YJ was first produced, mine is a first year.

Mike
As is mine, and I have v-belts. Have you checked the stampings on the block that's in the Jeep to determine if it's the original motor? Whenever I go to the parts store to order things for my rig, I have to be VERY careful to get the right parts. Many times they want to give me reverse rotation parts (water pump, alternator, etc).

Just something to check.
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Unread 02-22-2014, 08:40 AM   #9
jsawduste
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http://www.rockauto.com/catalog/more...717&cc=1184666

http://www.rockauto.com/catalog/more...281&cc=1184666 Shows belt routing

http://www.rockauto.com/catalog/more...989&cc=1184666

http://www.rockauto.com/catalog/more...477&cc=1184666

http://www.rockauto.com/catalog/more...541&cc=1184666

http://www.rockauto.com/catalog/more...557&cc=1184666

Interesting that the listings show both a V belt and a serp. belt. It would appear that Jeep used both in 87. Which I guess would be no surprise as Jeep sometimes made running changes depending on parts availability.
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Unread 02-22-2014, 06:45 PM   #10
Oldmx
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When I purchased the Jeep it was a one owner with the original engine so the serpentine belt set up is correct. I did figure out the alternator and belt problem but thanks for the information jsawduste it helped verify the routing issue. I am now on the search for some small parts so I can continue the build.

Mike
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Unread 02-22-2014, 06:54 PM   #11
jeepguy85
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Welcome to the 87 club. As far as the tranny goes, run it. My BA10 has 200k miles on it and is still running. It may be considered a light duty transmission, but it has held up well to the abuse I have given it. My 87 has a serpentine belt as well. Mine came with factory AC. I have wondered if the AC setup has anything to with the belt type. Though, I cannot confirm it.
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Unread 02-22-2014, 07:02 PM   #12
Oldmx
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jeepguy85 I also have A/C in my Jeep which may explain the serpentine belt. I am not too worried about the tranny since I had it overhauled along with the engine so everything is like brand new.

Mike
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Unread 02-22-2014, 07:17 PM   #13
jsawduste
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Mike, glad to have been able to help. Suspect you guys are correct in the AC option driving the serp. belt. The link was obviously a belt routing that has an AC compressor.

I do know that in stroker builds we sometimes find late model 4.2 cranks that do require the spacer for the balancer and some that don`t. This AC option may be a reason.

Not sure what small parts your looking for but perhaps these folks can help you out.
http://www.cfoffroad.com/index.html
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Unread 02-22-2014, 07:18 PM   #14
superj
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It is. Factory ac is the difference when you go to the parts store. Mine is factory ac too and serpentine as well as cruise and power steering.

You guys have Sahara's or Laredo's? Mine is an 87 laredo.

jsawduste, you ok man? Kind of funny post when we are talking about 87 models. That post is totally out of nowhere, your first post
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Unread 02-22-2014, 07:30 PM   #15
Oldmx
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Mines a Laredo.
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