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Unread 05-30-2006, 01:11 PM   #1
brypten
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350 swap help

I have a 82 CJ5 with a chevy 350 and a th350 tranny. I blew the motor last week, luckily my buddy has a GM 350 still in the crate that he is selling me cheap. I wasn wondering if anyone has some insight as too how much the engine and the tranny weigh together and if I should unbolt the tranny and just pull the engine or unbolt the transfer case and pull them both. Any info would be greatly appreciated

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Unread 05-30-2006, 02:33 PM   #2
Mudinyeri
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Why take out anything you don't have to? Support the transmission with a transmission jack and just pull the engine. As to how much it weighs ... well, that depends on what 350 it is. Is it an old iron block or a newer aluminum? Usually, the old iron from the 60's-70's weighs in at about 575 lbs. IIRC, the aluminum block engines are about 98 lbs less.

What do you have now and what are you buying from your buddy? The swap may not be as easy as you think if they're not exactly the same engine.
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Unread 05-30-2006, 03:29 PM   #3
BESRK
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I'd definately leave the auto tranny in place during the swap. However, now would be a good time to change the front tranny seal.
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Unread 05-31-2006, 06:28 AM   #4
brypten
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The engine that is in there now is from the 70's, I had heard around 600 lbs, so 575 sounds right. Both motors are 4 bolt mains, so I dont have to worry about that. I have an Holley 4 barrell with an edelbrock intake on the blown engine. The new engine has no intake, so I am hoping that I can just swap that right over. The new crate engine is also from the 70's.

The starter and alternator should just bolt right on. I hope! That sounds like a good idea to unbolt the tranny, I just hope that I can get to all the bolts from underneath the vehicle.

I got all but one bolt off for the oil pan on the blown engine. I can hear something rolling around in the oil pan, probably a rod! I put 3 one inch size ruptures in the oil pan when it blew, must have been form the rod spinning around. I am real curious to get the pan off and see what the crank looks like.
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Unread 05-31-2006, 07:25 AM   #5
BESRK
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Make sure to post pics of the damage..
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Unread 05-31-2006, 08:41 AM   #6
Mudinyeri
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Sounds like you should have a pretty close match. I was concerned that you might be replacing a carburated engine with a FI engine or vice versa.
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Unread 06-01-2006, 06:17 AM   #7
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So I got the oil pan off last night. Didnt get a chance to take any pics yet, but there is a lot of metal in the bottom of the pan. A few bolts, various metal parts, pretty nice! Then looking up at the engine one of the connecting rods going to the piston is snapped near the crank side and twisted 90 degrees. Definitly have to get some pics of this. I think that I am going to keep one of the bolts as a trophy
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Unread 06-01-2006, 07:28 AM   #8
Mudinyeri
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Ummm ... what were you doing when that happened?
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Unread 06-01-2006, 09:22 AM   #9
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I would take the Grill off the front , disconnect the transfer case and pull it out that way. Disconnecting the Trani and leaving it hanging on a Floor jack works too. But sometimes it will get in the way on the install of the new motor. Taking the grill off and pulling the motor up and Forward is a very nice way to go.
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Unread 06-01-2006, 01:50 PM   #10
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This is the part that I don't understand...I was just driving down the highway at 3000 rpm, right around 65 mph when it happened. Oil pressure was fine, temp was fine. From the time that I heard the knocking to the time that I got to the side of the highway was when I lost oil pressure, I believe that was from the ruptures in the side of the pan. Loose bolt maybe?
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Unread 06-06-2006, 12:26 PM   #11
brypten
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Not able to post pics here yet, but here is a link with some pics of my oil pan. Total carnage
http://www.cardomain.com/ride/2372711/1
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Unread 06-06-2006, 12:57 PM   #12
T Hoff
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Geez, something let fly. You pan is not all gummed up ( accept for the parts)
Nothing looks burnt either. Strange.
Was that HO motor the older ZZZ motor? I have the ZZZ motor in my jeep for 13 years. I have a 750 Holley 4011 carb and I have never been able to get it to run great. It bogs at hard accel. and even after driving at 20 MPH and accelerating it will bog.
I need a Carb Wizard that can play with the Power valves and Carb Cam to get this thing right. Too bad 'cause it goes like a raped ape after you get it wound up a bit.
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'75 CJ5 ---Chevy HP 350 motor-- All Fiberglas---one piece tilt forward nose
1985 chevy stepside pickup, 300K on the clock: Original Owner
1989 Volvo 240 300K on the clock: Original Owner
the 1991 X is my newbie with 331K on the clock: bought OCT.'03 with 183K
http://home.lyse.net/brox/TonyPage4.html
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Unread 06-06-2006, 01:02 PM   #13
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that is some lovely carnage in the pan get some of then engine that would be nice too
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Unread 06-06-2006, 02:36 PM   #14
BESRK
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Niiiiiice! Wonder what happened?.. loose rod cap? rod bolt let go?... I'd put all that busted up metal in a mayonaise jar and put it above the mantle..
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'80 CJ5 w/AMC360, T176, D44 w/Detroit 4.56, RE 4" YJ lift and 35s..

Ground Pounder Fab


Lower 2

Guardrail

Down Schoolbus

Slickrock Tellico

Save

Crozet

More Crozet
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