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1986 FLHTC EVO with Rocker Box Leak

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Old 08-11-2012, 06:34 PM
Shootemdownace Shootemdownace is offline
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Default 1986 FLHTC EVO with Rocker Box Leak

My rear rocker box is leaking from the center just above the exhaust. The guy I bought the bike from had an upper done on it (so he says) and it would appear that there is a leak coming from the bottom of the rocker box in the back. I am nervous about trying to tighten down the cap screws on top too much. Can I over tighten them? Unemployed and do not have a lot of $$$ right now so if I can avoid removing the rocker box and putting on a new gasket I would like to. I have not tried to tight the screws yet and was wondering if I should attempt it or just remove and bite the bullet? Thoughts?
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Old 08-11-2012, 06:46 PM
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hatchetman hatchetman is offline
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welcome to the forum! you can gently remove the box's & save the gaskets. Clean all surfaces up & add a thin line of blue silicone gasket sealer to both mating surfaces. That's the goop that smells like vinegar. Replace & tighten snug but no more!
You will need an allan key that is chopped down a little so it will fit between the frame & the bolt head.
Just take your time & you will by fine.
Canadian UN NATO Veteran.
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Old 08-11-2012, 06:48 PM
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texashillcountry texashillcountry is offline
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How bad is the leak?
If it is just seeping I would say ignore it till you can afford to fix it.
Yes you can over tighten the cap nuts.
Your rocker box comes in 3 parts and if it is leaking from the bottom part (the part touching the head) tightening the cap nuts will do nothing to stop the leak.
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Old 08-11-2012, 07:53 PM
Shootemdownace Shootemdownace is offline
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Yeah it is not that bad. Thanks for the heads up on the blue goop. I have some. It is the 3rd part that touches the head. Is this going to be involving the valve train? I have my repair manual that I can look it up in too. I have nothing but time right now so I can remove it and do the blue goop fix but I do not want to bite off more than I can chew. Again it is not a bad leak I just do not want to have it stain the head and jug. I wipe it every time I ride it but there is nothing worse than trying to get the stains out of the natural aluminum!
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Old 08-11-2012, 09:09 PM
Dr.Hess Dr.Hess is offline
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If you're going to do the job, do it right. Buy some new gaskets. The Genuine HD ones are good. People also like "cometic" gasgets.
1986 FLHT: S&S carb, Andrews EV1
1987 XLH 883 Hugger (Wife's): MegaSquirt Fuel Injection
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Old 08-11-2012, 09:18 PM
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jsbridgew jsbridgew is offline
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^^^ what 'Dr.Hess' said

but, if you're going to reuse the old ones- considering they're HD gaskets... and in some cases, you can, buy a can of copper spray and hit both sides
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Old 08-11-2012, 10:51 PM
IronWright IronWright is offline
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somewhat of a big job......u gonna pull tanks and rockers.....gittin involved....if u never wrenched before....leave it till u git some $$$$......pain in the a$$....u may git lukky and it be leaking between spacer and lower...if its lower to head.....have fun....either way, u will be pullin tanks.....
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Old 08-11-2012, 10:51 PM

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