I've been trying to figure out what people were talking about when they mention safety wiring the petcock. Now I know. Mine came apart while I was trying to reattach the fuel line.
In another thread I saw posted an indication that the petcock seal is 5mm id x 2mm cs. I have seals that size, and I don't see how they work. The male part of the petcock with the seal groove is 10mm O.D.
(http://i1367.photobucket.com/albums/r799/gofastica/petcock1_zps05d6f2e2.jpg) (http://s1367.photobucket.com/user/gofastica/media/petcock1_zps05d6f2e2.jpg.html)
So I'm thinking maybe I just need to stretch it on there, which I did, and it split.
(http://i1367.photobucket.com/albums/r799/gofastica/petcock2_zps390c1470.jpg) (http://s1367.photobucket.com/user/gofastica/media/petcock2_zps390c1470.jpg.html)
I tried a 7mm id x 2mm cs o-ring, but it's not even close to fitting in the female part of the petcock. The cross section of the seal is just too thick.
(http://i1367.photobucket.com/albums/r799/gofastica/petcock3_zpsf80e739b.jpg) (http://s1367.photobucket.com/user/gofastica/media/petcock3_zpsf80e739b.jpg.html)
The two pieces are fairly tight without the seal in place. When I tried to put the pieces together with the seal, it just got pushed down to the base.
(http://i1367.photobucket.com/albums/r799/gofastica/petcock4_zps91d12dba.jpg) (http://s1367.photobucket.com/user/gofastica/media/petcock4_zps91d12dba.jpg.html)
So what's the secret to making this fit? Are we sure this seal is supposed to be 5mm x 2mm?
Any thoughts appreciated
That joint was a press fit, now it is too loose. You could reinstall it :negative: with a gas proof adhesive and safety wire. You would need to get the angle correct as well. Or you could take the safe method :good2: and get a new one from Randy at RPM (http://www.rpmracingca.com/proddetail.asp?prod=M%2FC%3A84-85Petcock), he pre-wires them for you. If you chose to get new then consider the 84/85 petcock. It is less expensive and has a Prime position. The down side is you lose the electricky reserve function. I religiously check my miles so I always have a good feel for needing to fill up. Both still have the vacuum shutoff feature so fuel does not flow if the engine is off. Now I have a spare OEM switch for accessories when I want one.
I suppose that's a good news/bad news answer. Bad news, I broke it. Good news...just glue it together.
Thanks for the help.
I used green loctite and cable tied it in place,worked fine.I pull the fuel pipe at the T for the carb now which leaves the joint at the tap in place.
Sean.