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I am looking for some example pics of the gel seal application process to the crankcase surface of my '86 Johnson 150. Curious if anyone has some example pics, or found some on the web. I've ran out of luck searching for some. just want to ensure I'm on the right track. Thanks
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I never bothered with pictures but have used Gel-Seal or it's counterpart Loc-Tite #518. It's use does not require rocket science mentality, just use it as follows.
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(GelSeal & LocTite 518)
(J.Reeves)
GelSeal and the equivalent substance of LocTite 518 creates a sealing condition due to the absence of air. What remains of the substance after torquing the retaining bolts, as you may have noticed during disasembly, is a very thin almost clear sheet of sealant.
There is a removing substance to remove that old sheet but I have found that it can also be removed by carefully using a sharp putty knife like tool. Just be carefull not to actually scrape into the aluminum surface.
There are various methods to applying this sealer. My method is to apply a thin bead of the sealant from one end of the crankcase to the other, then spreading it around with ones finger so that it encompasses all of the bolt holes.
Make sure that you do not apply that substance any closer than 1/4" to the Main Bearing areas or to the Taper Pin holes.
As mentioned above, the substance seals with the absence of air, meaning that as soon as you set the other half of the crankcase in place, the substance starts to slowly take effect. So plan your job so that once you start this portion of the rebuild, you follow straight thru to the finish (all bolts tight and torqued).
The sealer substance that squeezes out internally will not harden as it will still be exposed to air. This will simply blow out the exhaust as the engine runs. The excess that squeezes out externally.... simply scrape/wipe it off to eliminate the gooey appearance. -
Thanks for the info. I appreciate it. I think where I am getting confused is figuring out the bead; do I just run the bead on the flange portion of the surface only, or should the bead run closer to the main bearing area, but no closer than 1/4 inch? should it resemble the pattern of a spaghetti seal when I lay the bead down?Comment
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The gel is going to come out of the plastic nozzle of the tube and yes, it will somewhat resemble a spaghetti seal.
Use your own judgement pertaining to the distance from the mail bearings... the thing is that you DO NOT want that stuff getting into the main bearings.
My method is to apply a thin bead of the sealant from one end of the crankcase to the other, then spreading it around with ones finger so that it encompasses all of the bolt holes, sealing them off.
The gel is spread around on the sealing surface of the half that the crankshaft is laying in... NOT the front half that will be laid on top of it.
When you tighten the front portion of the crankcase down onto the assembled portion (crankcase, pistons, etc), and you see the excess gel oozing out between the two, you'll know you sealed it properly.Comment
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