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Registered
Join Date: Jul 2000
Location: Bend, OR USA
Posts: 372
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JB Weld to fix Scratch in Cam Housing, see Photo
I'm in the process of replacing the cam seal on the very front left side cam that drives the MFI pump. Somebody (before me) put a small gouge in the cam housing. Most likely from removing a seal. I think this gouge could prevent the seal from sealing properly.
I'm thinking about trying to get a little JB Weld in there to fill the scratch. Any tips on doing this? I have not used JB Weld before. What should I clean the area with first? Will brake cleaner work okay? i was going to apply with a popsicle stick or something. Do I need to coat this with anything after I JB Weld? Thanks. 
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01-03-2005, 11:55 AM
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Slumlord
Join Date: May 2001
Location: Canada
Posts: 4,983
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Brake cleaner, fill it, let it dry. Sand it gently without removing metal nearby. Should work.
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84 Cab - sold! 89 Cab - not quite done 90C4 - winter beater |
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01-03-2005, 12:06 PM
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Heat helps JBWeld cure BTW. However it doesn't go on like "putty" so expect it to run. Use very small amounts and build it up/sand it down, otherwise you'll be sanding out a lot of stuff. should be okay. If you are splitting the cases, have someone weld then machine it.
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Chris ---------------------------------------------- 1996 993 RS Replica 2023 KTM 890 Adventure R 1971 Norton 750 Commando Alcon Brake Kits |
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01-03-2005, 12:11 PM
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Registered
Join Date: Mar 2001
Location: Marysville Wa.
Posts: 22,474
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use a pocket knife to carve off the raised burr, and also to apply the JB.
just squeegie it into the groove and don't leave any beyond it. to hard to get to to sand it off with the cam in there.
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https://www.instagram.com/johnwalker8704 8009 103rd pl ne Marysville Wa 98270 206 637 4071 |
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01-03-2005, 12:25 PM
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Slumlord
Join Date: May 2001
Location: Canada
Posts: 4,983
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Yea, those guys are both right. Maybe rotate the engine and apply it with the groove closest to the floor, then squeegee it flush and let it harden.
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84 Cab - sold! 89 Cab - not quite done 90C4 - winter beater |
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01-03-2005, 12:30 PM
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Join Date: Dec 2001
Location: Cambridge, MA
Posts: 44,431
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a coffee stirrer from Starbuck's would work well in applying and squeegeeing the JBWeld.
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Tru6 Restoration & Design |
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01-03-2005, 04:55 PM
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Slippery Slope Victim
Join Date: Oct 2001
Location: Brooklyn, NY USA
Posts: 4,394
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JB weld for sure, hardens like metal. I've repaired a few VW engine cases in the past. Just make sure there is no oil on the surface.
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MikeČ 1985 M491 Last edited by NY65912; 01-03-2005 at 05:04 PM.. |
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01-03-2005, 05:02 PM
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Registered
Join Date: May 2003
Posts: 3,346
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And use a non hardening sealer around the edge like Curil T when installing the seal for added protection.\
-Andy
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72 Carrera RS replica, Spec 911 racer |
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01-03-2005, 06:21 PM
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I assume this approach would also work on wheel hubs in the seal area? I've got a hub with a few scratches. Sounds like the JBWeld + Curil T approach would be perfect.
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Bill G. '68 911 Ossi Blue coupe |
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01-04-2005, 05:51 AM
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Slumlord
Join Date: May 2001
Location: Canada
Posts: 4,983
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Quote:
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01-04-2005, 05:53 AM
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No, the hub. I'm talking about the seal adjacent to the inner wheel bearing.
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Bill G. '68 911 Ossi Blue coupe |
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01-04-2005, 06:48 AM
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1970 Porsche 911 S 
