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Unread 12-20-2008, 12:36 PM   #1
pscj5
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1972 CJ5 
 
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do i need professional rebuild

okay could i rebuild this to make it run right or do i need to break down and buy another or just pay for rebuild, i am pretty handy with a wrench and have rebuilt a ford straight 6
WARNING THIS VIDEO IS THE ENGINE RUNNING ITS PRETTY LOUD SOUNDS LIKE MACHINE GUN


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Unread 12-20-2008, 02:36 PM   #2
pscj5
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okay i know it needs a rebuild, but could i do it myself since it runs or what do you think
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Unread 12-20-2008, 03:01 PM   #3
dirt4900
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all depends on how much you know. if you think you can do it and take the chance have at it. as for myself i am no master mechanic when it comes to motors but i think i know quite a bit, and id still have it done professionaly. that way you know its done right and if not most places usually have some small warranty that goes with it if anything happens. just my 2 cents.
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Unread 12-20-2008, 04:26 PM   #4
BESRK
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It is almost impossible to say without knowing you personally. I built my first engine (SBC 350) when I was 18. All I did was read "How to Build Your Small Block Chevy" and I had no problems. Engine rebuild went fairly well and the engine ran strong.

If you've never been "deep" in an engine before (ie.. dropped a crank, pulled a piston, installed a timing chain, installed an oil pump..etc.), you may want to have someone around who has built an engine or two to give you a hand. However, if you feel pretty confident about your mechanical ability you can probably swing it with a good "rebuild manual" or two.

BTW.. that engine sounds pretty bad
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Unread 12-20-2008, 05:49 PM   #5
Smtty58
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Even if you rebuild it yourself, parts will need to be sent to a shop for inspection and machining. You could ask them how much extra they would charge for assembling it for you. You might even get a warranty that way.
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Unread 12-20-2008, 06:58 PM   #6
Jeep2003
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you sure its a bad. have you tried to track down the knock? Perhaps the fan hiting the shroud or oil pan hiting the crank. could be somthing simple like that. I think if it was making a niose that loud internally it would only be a few seconds till it blew its guts out
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Unread 12-20-2008, 07:46 PM   #7
Saltydawg1
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Sounds like that engine has a rod knocking.
I wouldn't run it any further, you're only compounding the corrective work that will be needed.

Pull the oil pan and check out the rod and main bearings.
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Unread 12-20-2008, 09:47 PM   #8
pscj5
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i am pretty sure its comin from in the block but if its a rod knock or something do i still need a total rebuild
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Unread 12-20-2008, 11:33 PM   #9
Saltydawg1
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The only way to tell everything an engine is going to need is to tear it down and inspect it.

When a rod starts knocking you might as well plan on some machine work and a complete rebuild. Your bearings will be shot and you've probably done some damage to the crankshaft journals. This will require a machinist to fix.

You might get away with not doing any head work but that's entirely dependant on its condition.
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Unread 12-21-2008, 10:07 AM   #10
Vanmantraveler
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Lets all have a moment of silence for this motor....
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