Member Contributer Lannyl81 Posted July 15, 2017 Member Contributer Share Posted July 15, 2017 On my '97 I decided to replace the six exhaust gaskets; one at each cylinder and then two at the rear joint. The question I have is regarding these new gaskets; they are a ring, not flat like the old ones...so I was wondering if these need to be flattened prior to installation? The gaskets seem to be rather hard and I really doubt that they will flatten when the collars on the exhaust tubes are tightened....seems like it would require quite a bit of pressure which would just break the studs in the cylinders. If my blasted cell phone would connect to my computer I could post pictures of the new vrs old gaskets, but it will not. Going to be putting bike back together on Sun (7/16). Link to comment Share on other sites More sharing options...
daved Posted July 15, 2017 Share Posted July 15, 2017 Sounds normal, the gaskets compress and flatten as you tighten the exhaust nuts, that's how they seal. The nuts only need 12Nm or 9lb-ft of torque Link to comment Share on other sites More sharing options...
Member Contributer Lannyl81 Posted July 16, 2017 Author Member Contributer Share Posted July 16, 2017 Yep agree that is how the gaskets seal and I had looked-up and found the torque for the collar nuts...which still seems like it is not going to flatten these gaskets and seal. Will find out tomorrow though. I will put all back together and fire engine up and see if the popping is gone. Thanks Link to comment Share on other sites More sharing options...
Member Contributer Lannyl81 Posted July 16, 2017 Author Member Contributer Share Posted July 16, 2017 The exhaust gaskets all crushed-down just fine. I did put some high-temp sealant on one side of the gaskets in order to keep it in place so I could bolt the exhaust tubes on. Have everything back together ready to start the engine, but need to allow the sealant to cure for 24 hours....so no riding today. Link to comment Share on other sites More sharing options...
Member Contributer RobF Posted September 10, 2017 Member Contributer Share Posted September 10, 2017 I am re-installing the front header pipes. There are two gaskets, numbered '2' in the schematic. A couple questions: 1. What is the best way to secure these during install? 2. What are they made of? Lannyl81 mentions securing the gaskets with a high-temp sealant and then waiting for it to cure. Is that the way to go? Is Permatex RTV the correct product? I didn't see evidence of any adhesive when I pulled the old gaskets off the exhaust port. They just flicked right out. Link to comment Share on other sites More sharing options...
Member Contributer Duc2V4 Posted September 10, 2017 Member Contributer Share Posted September 10, 2017 3 hours ago, RobF said: I am re-installing the front header pipes. There are two gaskets, numbered '2' in the schematic. A couple questions: 1. What is the best way to secure these during install? 2. What are they made of? Lannyl81 mentions securing the gaskets with a high-temp sealant and then waiting for it to cure. Is that the way to go? Is Permatex RTV the correct product? I didn't see evidence of any adhesive when I pulled the old gaskets off the exhaust port. They just flicked right out. I believe the manual says to use grease. At least that's what I recall and ended up using. Link to comment Share on other sites More sharing options...
Member Contributer RobF Posted September 10, 2017 Member Contributer Share Posted September 10, 2017 12 minutes ago, Duc2V4 said: I believe the manual says to use grease. At least that's what I recall and ended up using. Thanks, Duc. I double-checked the service manual and didn't see guidance on this. Maybe I missed it. I'll try the grease. Link to comment Share on other sites More sharing options...
Member Contributer Mikey Posted September 10, 2017 Member Contributer Share Posted September 10, 2017 I used a high temp silicone grease to hold the gaskets in place, think it was rated up to 3000F Link to comment Share on other sites More sharing options...
Member Contributer JZH Posted September 11, 2017 Member Contributer Share Posted September 11, 2017 A little dab of grease. It burns away, unlike silicone! (Probably wouldn't hurt anything, but I wouldn't want to have to clean it out next time.) Ciao, Link to comment Share on other sites More sharing options...
Member Contributer RobF Posted September 13, 2017 Member Contributer Share Posted September 13, 2017 On 9/10/2017 at 10:40 AM, Duc2V4 said: I believe the manual says to use grease. At least that's what I recall and ended up using. On 9/10/2017 at 2:59 PM, Mikey said: I used a high temp silicone grease to hold the gaskets in place, think it was rated up to 3000F On 9/11/2017 at 2:27 PM, JZH said: A little dab of grease. It burns away, unlike silicone! (Probably wouldn't hurt anything, but I wouldn't want to have to clean it out next time.) Ciao, I can say that coating the engine-side of the gaskets with a bit of grease worked like a charm. The gaskets held in place even through the pushing and nudging it takes to get the exhaust assembly in place. Thank you, gentlemen. Link to comment Share on other sites More sharing options...
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