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Ard103
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« on: August 15, 2015, 03:00:01 PM » |
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The Valk had an old rusty black 6 into 6 exhaust on it so I bought a new chrome set.
I am having one heck of a time starting the acorn nuts onto the stubs at the heads.
I can get maybe one thread of each nut started, and only one side of the number 5 pipe.
I used new gaskets, are there different thicknesses of header gaskets out there?
The ones i have are part number 16-5976, and are 3/16 thick.
Thanks in advance
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N8171S
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« Reply #1 on: August 15, 2015, 03:09:26 PM » |
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Did you pry out the old copper gaskets? If not that could be the problem.
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Ard103
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« Reply #2 on: August 15, 2015, 03:13:14 PM » |
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Yes, destroyed them getting them out. Maybe shoulda left them in...
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gordonv
Member
Posts: 5762
VRCC # 31419
Richmond BC
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« Reply #3 on: August 15, 2015, 03:15:43 PM » |
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I was going to say that they aren't "gaskets", but more like crush washers. One in each hole.
Which new set of exhaust did you buy, who says it fits?
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1999 Black with custom paint IS   |
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Ard103
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« Reply #4 on: August 15, 2015, 03:29:16 PM » |
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Got the Cobra's and crush washers from Amazon, the pipes are the 1269's, I verified the part number at the Cobra website. The old crush washers are just 1/16 thinner than the new ones, crushed a little evidently. The flanges on the new set is a little different from the old set, thicker evidently.
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Ard103
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« Reply #5 on: August 15, 2015, 03:44:21 PM » |
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I was just reading the "Help broke a bolt" thread, I wonder if I could back the studs out of the heads about 1/4 of an inch, that would plenty of thread in the head I would think.
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BonS
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« Reply #6 on: August 15, 2015, 10:36:16 PM » |
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I recently installed a set of 6-into-6's and used new exhaust gaskets. I dug out out old gaskets and found that the studs were just barely long enough to catch a thread on the first install. I carefully, and evenly tightened them down and the new gaskets crushed down as I went. Be sure to check them after a few heating/cooling cycles to make sure they're still tight.
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hubcapsc
Member
Posts: 16781
upstate
South Carolina
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« Reply #7 on: August 16, 2015, 04:43:07 AM » |
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I've never installed Cobras... If you're using these fiber gaskets:  ... it might be worth trying some OEM gaskets... They're, like, hollow copper rings that crush down into nothing... -Mike |
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Ard103
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« Reply #8 on: August 16, 2015, 04:51:02 AM » |
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I've never installed Cobras... If you're using these fiber gaskets: ... it might be worth trying some OEM gaskets... They're, like, hollow copper rings that crush down into nothing... -Mike Those are the ones I am using. And it looks like the old ones that came off with the old exhaust. Are those fiber gaskets just a cheap aftermarket, or are they for a different application? I will get the OEM ones Monday, Thanks |
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Ard103
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« Reply #9 on: August 16, 2015, 04:53:29 AM » |
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I recently installed a set of 6-into-6's and used new exhaust gaskets. I dug out out old gaskets and found that the studs were just barely long enough to catch a thread on the first install. I carefully, and evenly tightened them down and the new gaskets crushed down as I went. Be sure to check them after a few heating/cooling cycles to make sure they're still tight.
Thanks for the info. I was a little afraid of stripping the stud with only one thread. In the post after yours, are those the gaskets that you used or did you use the OEM ones? |
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hubcapsc
Member
Posts: 16781
upstate
South Carolina
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« Reply #10 on: August 16, 2015, 05:17:51 AM » |
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You can get the fiber ones several different places. Some people really
like them, so I don't want to say they are no good, but they are
WAY thicker than OEMs, so the change might help you.
-Mike
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Ard103
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« Reply #11 on: August 21, 2015, 01:01:09 PM » |
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The OEM ones came in the other day, put those in and I am able to start all of the acorn nuts and start crushing the gaskets.
The thicker ones I had bought of off Amazon, the dealer is going to issue a refund for them, Powersports I think it was. $20 bucks is $20 bucks.
Thanks for the help everyone.
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BonS
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« Reply #12 on: August 21, 2015, 01:43:17 PM » |
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I used the hollow copper gaskets and they crush easily to quickly pick additional threads, but I was certainly concerned and went slowly.
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