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Twins Technical Talk Technical Talk for Hinckley Triumph Twins: Bonneville, T100, Speedmaster, America, Thruxton, and Scrambler.

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Old 11-15-2012, 05:08 PM   #1 (permalink)
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Cam gasket swap

Im swapping out my cam cover this weekend and have a replacement gasket because the current one is weeping.

I have some gasket sealant in stock and was planning on using that when installing everything. It's the type that does not set hard.

I assume I should clean up the surfaces and then apply a thin beed of the sealant and then place the new cover and gasket on top of the engine.

I don't have a manual so if anyone can confirm the correct torque setting I'd appreciate that very much.
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Old 11-15-2012, 05:22 PM   #2 (permalink)
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Torque - 14 Nm.
I'd be reluctant to use gasket sealant in case it squashes out inside and causes a blockage. I used a film of grease to hold the gasket in place and torqued down with new crush seals - no leaks.
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Old 11-15-2012, 05:57 PM   #3 (permalink)
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Make sure you replace the cam cover bolt washers also, I torqued mine to I believe 10nm and had no leaks.
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Old 11-15-2012, 06:00 PM   #4 (permalink)
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I believe 14Nm is the revised torque setting.
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Old 11-15-2012, 06:11 PM   #5 (permalink)
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Quote:
Originally Posted by denbow View Post
I believe 14Nm is the revised torque setting.
Yes, 14Nm is correct now. I shouldn't even try to contribute on this, having had only miserable failures on three attempts to replace mine. I followed each of several theories on the best method; grease, gasket sealer, and dry with all surfaces wiped clean. I finally succeeded after buying a used aftermarket cam cover to replace my cracked one that came with the gasket somehow embedded in the groove. I cleaned all very well, put it on dry, tightened per spec, nary a leak.
The key is getting that slippery snake of a gasket to stay in place and in the groove...

Good Luck!
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Old 11-15-2012, 07:39 PM   #6 (permalink)
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Auto wheather strip glue works great to hold the gasket on the cover thats all I use.
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Old 11-15-2012, 10:23 PM   #7 (permalink)
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I replace the bolt seals every time and have been torquing to 10nm. I get both sealing surfaces completely clean and dry using Varsol (mineral spirits). I install the gaskets completely dry and I get no leaks.
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Old 11-15-2012, 10:49 PM   #8 (permalink)
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Hello
I had a weep at about 18000km. Took cover off, cleaned mating surface and applied a very thin coating of Loctite non hardening gasket sealant. Worked a treat, if you apply a thin coating no chance of squeezing out. I bought new washers but did not use them. I torqued to 10nm and have only just seen the new spec. 10nm seems plenty to me.
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Old 11-16-2012, 01:33 AM   #9 (permalink)
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Thanks for your replies. Very kind of you all. That's my Saturday morning job sorted.
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Old 11-16-2012, 01:42 AM   #10 (permalink)
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Gasket

Quote:
Originally Posted by plumpton View Post
Im swapping out my cam cover this weekend and have a replacement gasket because the current one is weeping.

I have some gasket sealant in stock and was planning on using that when installing everything. It's the type that does not set hard.

I assume I should clean up the surfaces and then apply a thin beed of the sealant and then place the new cover and gasket on top of the engine.

I don't have a manual so if anyone can confirm the correct torque setting I'd appreciate that very much.
No to the sealant.

Lightly oil the faces and seal, this will allow it to move when tightening.

Change the washers, or expect leaks again.

Really clean out the pockets as the washers can leave lumps of rubber in there.

Most importantly torque down in multiple stages, believe the torques have been posted. You cant do to many stages,

Also make sure the groove in the cover is really cleaned out well and the new seal is perfectly seated. As my gasket came in a little bag, probably worth leaving it out to loose the screwed up shape.
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