AMC 360 Smoking - JeepForum.com
 
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post #1 of 6 Old 02-23-2009, 04:17 PM Thread Starter
jp360cj
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1977 CJ7 
 
Join Date: Oct 2007
Location: Greenville
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AMC 360 Smoking

My AMC 360 has started smoking (blue). It seems to be the worst when I let off the gas, like shifting gears or to come to a stop. It burned a quart of oil over the past 1000 miles. Any guesses what's causing it?

It has always burned a little oil, 1/2 qt to 1 qt between changes, but it seems to have gotten much worse the past week or 2. Is it a major problem, or will it be ok to just keep adding oil until I can get it checked out and fixed this summer?


77 CJ-7- AMC 360, Edelbrock cam, MC2100, Fenderwells, CJ T18/D20, Chevy D44/EB 9" rear, Trutrac f/r, 4.11, SOA, 1.25 lift shackles, 35x12.50 BFG KM2s, Shackle Reversal
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post #2 of 6 Old 02-23-2009, 05:13 PM
cscotted
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Check your PCV system... and if you dont have one, like many older AMC V8s then you need to create one. One intake and one evac..

calling an illegal alien an undocumented immigrant is like calling a drug dealer an undoccumented pharmacist.
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post #3 of 6 Old 02-23-2009, 07:50 PM
CJ Runner
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How many miles on the engine? Done a compression test on it? Could be worn rings or a problem in the heads.
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post #4 of 6 Old 03-01-2009, 09:19 PM Thread Starter
jp360cj
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The motor has around 80,000 miles on it. I haven't done a compression test b/c I don't have a tester. Either going to borrow one this weekend when my buddy gets into town or buy one when I get back home.

It was a quart low, so I added a quart. Just under 100 miles later it's a qt low again. Changed spark plugs and #7 was the only one that was oily. How do I tell if it's a problem with the rings or valves?

77 CJ-7- AMC 360, Edelbrock cam, MC2100, Fenderwells, CJ T18/D20, Chevy D44/EB 9" rear, Trutrac f/r, 4.11, SOA, 1.25 lift shackles, 35x12.50 BFG KM2s, Shackle Reversal
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post #5 of 6 Old 03-01-2009, 11:58 PM
OldSailor
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Quote:
Originally Posted by jp360cj View Post
How do I tell if it's a problem with the rings or valves?
Do a compression check. If none of the cylinders are low, the rings and valves are basically OK.

If one or more of the cylinders are low, then squirt some motor oil into the cylinder through the spark plug hole and check compression again right away. . If that improves the compression, then it was the rings that are worn. The valves may also be worn, but at least you know that the rings are worn. If squirting oil in doesn't improve the compression at all, then it's likely just some slightly leaky valves.

1977 CJ7, AMC360 V8 w/ headers, DUI HEI, Edelbrock intake, Holley 4150 carb, , TF999, D300, D30 front and AMC20 rear with 4.56 gears and lockers both ends, 4" susp lift, 2.5" body lift, 35" BFGs, ARG steering, 8000-lb winch, etc.
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post #6 of 6 Old 03-29-2009, 09:19 PM Thread Starter
jp360cj
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Finally got some time off of work/school and found out the problem is with the piston ring. I would love to pull the motor, tear it down, and rebuild it; but I'm going school, only able to work part time, and money's tight. How hard would it be to replace the rings just on that cylinder for without pulling the motor? Also, can it be done without removing the head? How much would it cost to pull all the cylinders and do it myself?

Sorry for all the questions, but this is my first time doing any real motor work

77 CJ-7- AMC 360, Edelbrock cam, MC2100, Fenderwells, CJ T18/D20, Chevy D44/EB 9" rear, Trutrac f/r, 4.11, SOA, 1.25 lift shackles, 35x12.50 BFG KM2s, Shackle Reversal
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