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Sticky lifter |
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amx39068 
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Joined: Feb/21/2008 Location: Arizona Status: Offline Points: 10230 |
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 Posted: Apr/30/2012 at 10:11am |
I agree. This engine is 40+ years old and a sticky lifter is not uncommon and something that Marvel Mystery Oil was specifically formulated to address. Add a pint now and with each subsequent oil change and I'll bet your random ticking will be a thing of the past. |
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Dan Curtis, AZ AMC collector quality Restorations, Parts & Engines - amcmusclecars.com
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dkrtgood
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Joined: Jun/27/2011 Location: Florida Status: Offline Points: 556 |
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Posted: Apr/30/2012 at 10:06am |
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Ok I have checked oil pressure - Good
Changed filter and used 10-40 oil this trip. Have not heard the lifter do it's thing...but now I have an almost constant annoying tap...not as pronounced as the lifter not pumping up...that sound you could tell there was a lifter not doing it's job. This sounds more like typical valve train noise. So I took the valve cover off and inspected. For 83k miles it looked like brand new, I did the bolt head trick just because I was in there and figured why not, it can't hurt. What I did find is the possible culprit....The rocker shaft has collars that divide and keep the rocker arms in the correct place and I could jiggle those collars / sleeves and basically duplicate that noise. Should there be slop there? and if not, can the end play of the cam be shipped to get the whole assembly tighter? I'm thinking of going the cam kit route eventually to take care of the occasional lifter sticking (Cam, Lifters & Timing chain) but I really think the noise that I am hearing currently is the rocker bridge. Thoughts? Edited by dkrtgood - Apr/30/2012 at 10:07am |
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Dave Goodwin
70 Mark Donohue BBO 390 4-speed 69 Javelin - 232 six (My Daily Driver) 2010 Dodge Challenger - V6 (Wifes daily driver) AMO# 10163 |
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Thikstik
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Joined: Mar/20/2008 Location: Alabama Status: Offline Points: 1121 |
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Posted: Apr/22/2012 at 2:43am |
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Marvel Mystery oil may be good.
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75 gremlin x, jeep 4L headed 258,Clifford cam, intake,header. 390 holley. I want a 282 VAM motor!
AC/PS/PDB. 72 AMX , 304 2bbl, 3speed, now disks...probably will sell, want an automatic /AC. |
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KermitDRambler
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Joined: Jul/06/2007 Location: Cincinnati, OH Status: Offline Points: 2276 |
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Posted: Apr/14/2012 at 8:46pm |
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The head bolt mod will not do anything to improve oil flow to the lifters (this isn't really the problem anyway, it's an oil drain back problem). That only improves oil flow to the rockers and as long as you are good about changing the oil, it isn't really even needed. If you want to do the head bolt mod, you can read about it here: http://www.mattsoldcars.com/RestoreAmerican/boltmod.shtml .
Matt
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1967 American wagon
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Thikstik
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Posted: Apr/13/2012 at 7:53pm |
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Id try an additive and run the hec out of it. I have 1 lifter that does same thing . PBM brand...very unpredictable, and always goes away. Sometimes come back alittle if i rev to 6k, but quickly goes away again.
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75 gremlin x, jeep 4L headed 258,Clifford cam, intake,header. 390 holley. I want a 282 VAM motor!
AC/PS/PDB. 72 AMX , 304 2bbl, 3speed, now disks...probably will sell, want an automatic /AC. |
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vinny
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Posted: Apr/13/2012 at 4:37pm |
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I agree with Matt. I wouldn't be pulling the engine apart. It should be good for another 20K or more. Just make sure it is getting oil to the top.
The head bolt they talk about is the third from the back on the passenger side. IIRC it involves machining/grinding a one inch band from the shank of the bolt down to the minor thread diameter starting 1/4" from the top of the bolt thread and up from there. |
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KermitDRambler
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Posted: Apr/13/2012 at 3:34pm |
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You don't actually need to worry about this condition. If you still have your owner's manual, it will even point out that this is a normal noise at start up. A better quality oil filer (WIX or Purolator) will reduce the frequency that it happens but it will still happen sometimes.
Matt
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1967 American wagon
http://www.mattsoldcars.com |
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dkrtgood
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Posted: Apr/13/2012 at 1:00pm |
Head comes off for sure! I'll check oil pressure but since it's only happened a couple times it not a constant low oil issue from what I can tell. Thanks guys
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Dave Goodwin
70 Mark Donohue BBO 390 4-speed 69 Javelin - 232 six (My Daily Driver) 2010 Dodge Challenger - V6 (Wifes daily driver) AMO# 10163 |
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vinny
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Posted: Apr/13/2012 at 11:49am |
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I don't think you can change a lifter without pulling the head, at least not on the older ones.
I would put a temporary oil pressure gauge on it to see what you've got followed by pulling the valve cover to ensure you are getting oil to the front rockers. Maybe you could see that through the filler cap hole. If it is a pre mod engine your rocker shaft could be wearing out and you are just beginning to hear the noises. There is a head bolt mod that can be done to get more oil to the rockers. |
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FuzzFace2
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Posted: Apr/13/2012 at 10:31am |
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At next change maybe try a different filter if yours does not have the anti drain back valve and 10-40 to see if that makes a difference.
As for the lifters I hear you can do new lifters with old cam. You would treat it like a new cam, break in lube on cam & lifters and I would run zink additive to the oil. I do the additive to all my AMCs why risk it.
Dave ----
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75 GremlinX v8
76 GremlinX i6 (sons) 70 Javelin SST 390/4sp (360/5sp now) 70 Javelin 1/4 Drag car 360/auto |
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Thikstik wrote: