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wonkish cylinder maintenance questions

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jonboede(at)hotmail.com
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Posted: Sun Apr 06, 2008 7:42 pm Post subject: wonkish cylinder maintenance questions

Anybody have a rule of thumb (I know that an actual number of foot-pounds would be too much to ask for) for torquing the bolt the provides the pivot for the rocker arms?



I changed a valve last week and then noticed that my engine was pretty soaked with oil (well, more than usual .  Further investigation revealed that a pretty good drip was coming out the side of the rocker arm bolt (er, really more around the edge of the washer on the "head" side of the bolt, to be precise) -- in my zeal to not over-tighten it, I under-tightened it.  



So before I just make something up, I thought I'd ask how to do it right.



Bonus question: If I tighten it to a certain point and that doesn't line up with the cotter pin hole, should I go just a little tighter or little looser to the next slit in the castle nut?



And here's a really wonkish question...



In the past, I had placed the cylinder base gasket over the bolts coming out of the block (it's easiest to get it aligned just right) and put the o-ring on the cylinder skirt.



However, the book seems to suggest that you slide the gasket over the skirt and then put the o-ring on after that so that it's all riding on the cylinder when you slide it onto the base bolts.



Anybody got an argument one way or the other?  I usually spray my gaskets with that copper-colored sealant to make them slightly tacky -- I haven't had any gaskets blow out since I started using that -- and so it's easier to put the gasket on the block.



And on that, what I learned a while back is that a blown-out cylinder base gasket ups your oil consumption by about 2.5 quarts an hour.  



Jon

  [quote][b]

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adsavarese(at)hotmail.com
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Posted: Mon Apr 07, 2008 3:54 am Post subject: wonkish cylinder maintenance questions

Jim,

 Did you replace the crush washers on the rocker arm  bolt?  If not, it could very well be the cause of the leak.

 Dennis

  

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jonboede(at)hotmail.com
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Posted: Mon Apr 07, 2008 7:01 am Post subject: wonkish cylinder maintenance questions

Oops.  No.    (sheepish look)



After I replace them (well, after I get new ones from Doug) ... how tight should they be?



Jon



[quote]From: adsavarese(at)hotmail.com

To: yak-list(at)matronics.com

Subject: Re: wonkish cylinder maintenance questions

Date: Mon, 7 Apr 2008 06:50:17 -0500



      .ExternalClass .EC_hmmessage P {padding-right:0px;padding-left:0px;padding-bottom:0px;padding-top:0px;} .ExternalClass BODY.EC_hmmessage {font-size:10pt;font-family:Tahoma;}     Jim,

 Did you replace the crush washers on the rocker arm  bolt?  If not, it could very well be the cause of the leak.

 Dennis

  

 [quote]   ---

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dsavarese(at)elmore.rr.co
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Posted: Mon Apr 07, 2008 12:57 pm Post subject: wonkish cylinder maintenance questions

I don't have the exact torque spec.  But Carl/Jill  may have it documented somewhere.  You can try 25 - 28 ft. pounds  or at that range of torque, line up the cotter pin hole in the castellated  nut.  I will try my sources for a list of engine nuts/bolts torque  specs.

 Dennis

  

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dsavarese(at)elmore.rr.co
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Posted: Tue Apr 08, 2008 5:13 am Post subject: wonkish cylinder maintenance questions

Jon,

 I verified the torque specification for the rocker arm  bolt nuts with the engine overhaul shop.  It is as I suggested,  3.5 KGM or 25 ft. pounds.

  

 For those who have ever been looking for the torque  specifications for the Russian V530 propeller nuts, it is 12 KGM or 87 ft.  pounds.

 Dennis

  

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jonboede(at)hotmail.com
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Posted: Tue Apr 08, 2008 9:50 am Post subject: wonkish cylinder maintenance questions

Thanks!!



I believe that's the same torque on the cylinder base nuts and the torque I've been using on spark plugs.



Jon



[quote]From: dsavarese(at)elmore.rr.com

To: yak-list(at)matronics.com

Subject: Re: wonkish cylinder maintenance questions

Date: Tue, 8 Apr 2008 08:10:17 -0500



      .ExternalClass .EC_hmmessage P {padding-right:0px;padding-left:0px;padding-bottom:0px;padding-top:0px;} .ExternalClass BODY.EC_hmmessage {font-size:10pt;font-family:Tahoma;}     Jon,

 I verified the torque specification for the rocker arm  bolt nuts with the engine overhaul shop.  It is as I suggested,  3.5 KGM or 25 ft. pounds.

  

 For those who have ever been looking for the torque  specifications for the Russian V530 propeller nuts, it is 12 KGM or 87 ft.  pounds.

 Dennis

  

 [quote]   ---

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dsavarese(at)elmore.rr.co
Guest

Posted: Tue Apr 08, 2008 10:01 am Post subject: wonkish cylinder maintenance questions

Yes, that's correct (cylinder base nuts).   Actually, the Russian spark plug torque spec is 18-22 ft. lbs.

 Dennis

  

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