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post #1 of (permalink) Old 05-12-2002, 01:23 AM
HAGGLUNDBV206
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SMOKING SAMMY

My 87 just recently started smoking very badly, about 1 1/2 quarts a day bad. the motor only has about 15k since rebuild, the head is higher. I know that oil is leaking down past the valve quides, but don't think it could leak that bad. I am thinking my rings are probably fried, hoping not. Once I pull the head off is there any way to tell if I will need to pull the motor and do a full rebuild without taking out the pistons and everything? Maybe a compression test would be easiest? Any advise? What is the procedure for a compression test? Thanks for any help guys
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post #2 of (permalink) Old 05-12-2002, 08:15 AM
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Re: SMOKING SAMMY

For testing compression
I use a tester that screws into the head (remove all plugs first) start with the #1 cly, and use a note pad for recording readings. Screw tester into #_ cly and turn engine over at least 6 times (piston will come up to compression stroke 6 times). Record finding on each cly. Each cly should be within 10% + - of each other.
After the test, If a cly is low, use a oil squart can and squart about 2 - 3 squarts of oil into the cly. If compression comes up on the low cly's, The rings are not sealing, If it stays the same, The valves are not sealing.

As allways ---- Remember to place trans and t/case in neutral and support Zuk on jack stands(your choice) . And allways place mother-in-law in front of Zuk, or under the tire that might turn.[img]images/icons/smile.gif[/img] J/K <font color=blue> HAPPY MOTHERS DAY TO ALL MOTHERS. WHERE WOULD WE BE WITHOUT YOU !!!!!!!! </font color=red>
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post #3 of (permalink) Old 05-12-2002, 09:55 AM
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Re: SMOKING SAMMY

Tim, you're gonna burn in hell for that mother in law remark for sure . Anyway, you would be surprised how much oil can go past the guides . Don't let it go for long, if a hunk of carbon gets loose, it can snap a valve if it gets caught between it and the guide , as they always seem to do. If you pull the head , the pistons shouldn't be able to move side to side hardly at all , if the rings are bad, you'll be able to wiggle them quite a bit since there won't be any tension . Take the exhaust manifold off, and see if the stems of the exhaust valves are caked with thick carbon....
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