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Unread 03-06-2012, 09:18 PM   #1
bigtex16
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Join Date: Mar 2012
Location: Odessa, TEXAS
Posts: 9
Please help. Newbie here.

Hi guys, I just bought my first 1989 YJ last week. It has the 4.2 inline 6 in it but it is tired and in need of some work. I am getting a lot of blow by in the air breather. I have replaced the pcv valve and the valve cover gasket and still have the same problem. My question is would it be cheaper to have the motor rebuilt or buy a motor from "Collins Brother Jeeps" for $1300.00. I have been looking at the 4.6 liter stroker motors but I just dont have the money right now to do that. Any help would be appreciated.

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Unread 03-06-2012, 09:26 PM   #2
raynmaker
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1990 YJ Wrangler 
 
Join Date: Feb 2010
Location: colorado springs, colorado
Posts: 700
Did you run a compression test?
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Unread 03-06-2012, 09:31 PM   #3
bigtex16
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Location: Odessa, TEXAS
Posts: 9
No I havent yet. I plan on it this weekend if I dont have to work.
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Unread 03-06-2012, 09:39 PM   #4
davsyjdd
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1989 YJ Wrangler 
 
Join Date: Aug 2011
Location: Amity, Oregon
Posts: 73
I bought a new rebuilt one From S&J out of Spokan Wa. for $1300. All parts new Valves Guides,ect. I priced it myself parts & machine lobor and came up with about $800-1100 with no garrentee and I do all the work. I usually do it my self but my Jeep had a lot of other issues to deal with. Good luck
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Unread 03-06-2012, 09:41 PM   #5
bigtex16
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Location: Odessa, TEXAS
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Thanks for the info. I will check them out.
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Unread 03-06-2012, 09:58 PM   #6
raynmaker
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1990 YJ Wrangler 
 
Join Date: Feb 2010
Location: colorado springs, colorado
Posts: 700
If compression is ok then it could be the valve cover baffles.
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Unread 03-07-2012, 11:30 PM   #7
Flajeeper1
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1987 YJ Wrangler 
 
Join Date: Oct 2009
Location: Lakeland, FL
Posts: 726
Quote:
Originally Posted by raynmaker View Post
If compression is ok then it could be the valve cover baffles.
Definitely try this first and check that the hose from the PCV is clear inside.
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