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Unread 06-15-2008, 05:18 PM   #1
243
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1983 CJ7 
 
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Rings and Bearings w/ motor in the Jeep?

I found a NOS Rochester Varajet last week and really want to get my Jeep on the road while I rebuild the T176, D300 and the TBI 350 over the winter. Two of four cylinders had low compression and it's running rich so now I am wondering if I have some cracked valves.

If I pull the head to check the valves, could I also pull the pistons, drop the crank and re-ring it?

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Unread 06-15-2008, 06:07 PM   #2
BESRK
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Quote:
Originally Posted by 243 View Post
I found a NOS Rochester Varajet last week and really want to get my Jeep on the road while I rebuild the T176, D300 and the TBI 350 over the winter. Two of four cylinders had low compression and it's running rich so now I am wondering if I have some cracked valves.

If I pull the head to check the valves, could I also pull the pistons, drop the crank and re-ring it?
If I were gonna do that, I'd just pull the engine and put it on a stand. It's a whole lot nicer doing piston work when 10W30 isn't dripping in your eyes... Not much to pulling that little Iron Duke.
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Unread 06-16-2008, 06:33 AM   #3
steveracer67
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Not too mention you ever try to torque rod and main bearings upside down? Plus do clearances for bearing preload and sideload.
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Unread 06-16-2008, 06:46 AM   #4
Curt Reinhardt
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If you re-ring it you should at minimum hone the cylinders to remove glaze.

You're talking about doing the better half of a rebuild. You would save time and have a shot at doing a much better job with the engine on a stand like BESRK suggested.
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Unread 06-16-2008, 07:30 AM   #5
243
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Ya'll are right, it's a tiny little four-banger so pulling it's no sweat. If I do, I can replace the clutch and the front bearing in the T176 at the same time.

Before I pull it though, I am going to re-check the compression to see if 2 and 3 are the low cylinders which could be a head gasket. I think a leak-down test would make sense too...I may get lucky and find a bad valve or blown head gasket and an easy repair.
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