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Unread 08-17-2010, 11:08 AM   #1
topherbarrow
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Help on engine choice!!!

I have an 81 CJ7 with a 258 in it. I have restored mostly everything except the engine (wiring, interior, exterior, etc). I have put the engine off long enough too.

My issue is that the engine has been losing oil and will also lose prime if left alone for more than a few hours. Meaning I have to use starting fluid in the carb to get it going again. Big hassle!!!

I was thinking of just getting a good rebuild done on the 258, but have also thought about upgrading...My decision will be based on price, power, and easiness.

If you have any insight on the options please let me know.


Thanks everyone!!

Topher

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Unread 08-17-2010, 11:48 AM   #2
Pathkiller
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What is your goal for this Jeep? You said you have "restored" the other systems. Do you mean you are restoring the Jeep back to factory condition? If so you would want to stick with the original drivetrain and restore it to original running condition. If you're not concerned about originality then the world is your oyster. Go with whatever you can afford. Anywhere from an AMC V8 to a 4.0L transplant from a later Jeep to a Chevy LS engine, there are many different options out there.
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Unread 08-17-2010, 01:46 PM   #3
Vee
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I'd stick with the 258, but that's just me.
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Unread 08-17-2010, 02:33 PM   #4
Jeepican
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I agree.... i would stick w/ the 258 if it was me.... but it all depends on your use.....
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Unread 08-17-2010, 03:03 PM   #5
LSUtiger
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It also depends on which trans you have. If it is a t4 or 5 or sr4, I would keep the 258 for sure.
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Unread 08-27-2010, 01:00 PM   #6
topherbarrow
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It has a t4 in it, and don't necessarily care about keeping it original. I really just wanna have a solid engine that is reliable. I don't do a lot of off roading, but if i do it's nothing too crazy. I have 33's on it and don't intend on going any bigger.
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Unread 08-27-2010, 01:26 PM   #7
kickingprop
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I'd stay with the 258 but keep your eyes open for a T176. 258/T176/D300 is a fantastic drivetrain combo for the moderate wheeled/streeted CJ
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Unread 08-27-2010, 01:29 PM   #8
Jeepican
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258 is pretty darn reliable if you ask me....it might could use a diaper change every now and then tho...
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[URL="http://www.jeepforum.com/forum/f8/slow-76-cj5-rebuild-1118617"][COLOR="blue"]My Build Thread[/COLOR][/URL]

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Unread 08-27-2010, 06:25 PM   #9
brandon20
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whats the difference between the 176 and 177? is it just the gear ratio? i thought most cj's from 1982 on have the 177 in them.
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Unread 08-27-2010, 11:18 PM   #10
RangerRick
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T-177 is from a full size Jeep/pickup, it has a longer input and is different. You want a T-176 from a CJ.

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Unread 08-28-2010, 04:16 AM   #11
jcal73
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Quote:
Originally Posted by RangerRick View Post
T-177 is from a full size Jeep/pickup, it has a longer input and is different. You want a T-176 from a CJ.

RangerRick
My T-177 is from a CJ. There are some out there.

Jeff
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Unread 08-28-2010, 08:25 AM   #12
brandon20
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what are you talking about? I thought the t-176/177 were the exact same tranny except for the the 3.82 versus 3.52 first gear ratio which gives the 177 a little more pop in first. the output shaft is a bit longer i also have in my 1985 cj. maybe somebody mcan glarify this and if more 176 or 177's are out there
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258 inline 6 , 4.2 liter , cj7 rebuild question , engine swap

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