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Post by JLantz on Apr 28, 2004 0:47:07 GMT -5
Packing the coupling with grease didn't do anything to grab my attention. I pulled the valve cover and filled the cavity the coupling rides in with oil, though, and there was a noticeable difference. I could still hear the rattle, but it was much more quiet. I'll see about getting new parts for the coupling tomorrow. I was thinking this might be a design flaw, that the coupling isn't lubricated very well, but none of you seem to have the same problem, so I think its just worn.
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Post by JLantz on Jun 30, 2004 0:50:21 GMT -5
Got it! Twas the balancer chain and guide making the noise. The plastic on the guide was worn through and the chain was rubbing on the aluminum. This job was a real ego deflator, I was confident in my diagnostic skills, but they led me astray. In school I was taught to be a troubleshooter, not a parts replacer. I did end up replacing the distributor housing with a brand new unit, which did absolutely nothing. I didn't probe with the stethascope behind the timing cover where the chain guide is, which was sloppy of me. I would have saved a lot of time and money if I had been more thorough with my evaluation and listened to the advice given in this thread more carefully. Anyways, It's done and I have learned another valuable lesson.
Summary:
Noise that sounds very similar to loose valves (little man with a little hammer) at most RPM's, anytime foot is on the gas, though varies with load. When rolling, noise will subside if foot is taken completely off of gas pedal, and will make a noticeably louder initial noise when foot is returned to gas pedal.
Soultion:
Replace balancer chain and balancer chain guide.
Reason: Chain has stretched, and the plastic on the chain guide has worn through to the aluminum. Chain whips around balancer gear at power, causing the chain to run directly into the right side edge, top rub rail of the balancer.
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Post by RustyJusty on Jul 4, 2004 21:09:58 GMT -5
Thanks for the in-depth investigation... hopefully this will be the solution to my noisy engine!
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Post by Viperguy on Jul 16, 2004 2:29:14 GMT -5
seeing all this noise talk has got me wondering, me and my friend both have 1986 justys (well he has an 85 body and an 86 engine) and we've noticed that both of them have a nasty rattle at constant speed (particularly around the 2.5k-4k mark), but the noise immediately goes away when taking your foot off or putting it back on the gas....
any suggestions?
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Post by longbeachjusty on Apr 17, 2009 22:05:45 GMT -5
should have left well enough alone now im gettin chatter
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Post by subyswamper on Apr 18, 2009 15:01:41 GMT -5
Is it just your lifter ajustment is off?
.008" on the intake and .012 on the exhaust side. If that is you problem that is.
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SeattleJusty
No, a boxer will not fit in a Justy.
Posts: 1,587
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Post by SeattleJusty on Apr 18, 2009 20:59:15 GMT -5
This adjustment is very tricky because it is easy to get your adjustment but then lose it when you go to tighten it down. I usually make my adjustment, tighten down then hand crank the engine a few times and do the adjustment all over again. Sometimes takes 3 tries but this is how I have always done it and it works like a charm. The trick is to not let the adjusting screw turn when you tighten down the...tightening screw<----- is that even what you call it? I am inarticulate today.
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coal
Lets roll. When I get rollin.
Posts: 468
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Post by coal on Apr 18, 2009 23:18:22 GMT -5
Ferox helped me do it we spent a bit of time. Patience is what you need to get it correct. Doing the job is easy doing it correct is a different animal.
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SeattleJusty
No, a boxer will not fit in a Justy.
Posts: 1,587
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Post by SeattleJusty on Apr 19, 2009 3:38:51 GMT -5
Ferox helped me do it we spent a bit of time. Patience is what you need to get it correct. Doing the job is easy doing it correct is a different animal. Amen to that brother! This is one of those things that I could show somebody much better than trying to explain it in a message board post
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