crush gasket - what is it & where do they go ? - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 9 (permalink) Old 06-23-2007, 09:45 PM Thread Starter
 
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crush gasket - what is it & where do they go ?

Okay, I gotta take my stock exhaust system off to change the stator. Based on what I've read I'm gonna need a pair of "crush" gaskets and I can get them from Harley-Davidson shops part#17048-98.

Trouble is, I have no idea what a crush gasket is, what it looks like and where it goes. Using the shop manual, page 1057, or Clymer's, page 282, can you tell me the reference number that the "crush" gasket maps onto ?

Thanks alot,
Luis Pereira

Last edited by ktullu; 06-23-2007 at 10:12 PM.
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post #2 of 9 (permalink) Old 06-23-2007, 10:14 PM
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The Crush gasket goes in between the exhaust and the motor.
You will see it when you remove the old exhaust.

Chad Falstad "Hawk"
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post #3 of 9 (permalink) Old 06-23-2007, 10:26 PM
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Many new cars and trucks use crush gaskets on the oil drain bolt and Honda
I believe uses them on the fill and drain bolt on the rear diff.
Toyota wants 1.85 for a crush gasket on my fj cruiser.. most sell for a lot less.
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post #4 of 9 (permalink) Old 06-23-2007, 11:30 PM
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Norss, you can reuse the gasket on the oil drain as long as you don't over tighten it. It is not a crush gasket, it is Aluminium.
I am a Toyota Master, usually you can get 3 or 4 changes with the same one, just don't crank on it, Spec is 11 LBS of Torque.
I do change them on every oil change because they charge them for it, but on my 4Runner and wifes Rav4 I reuse it.

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post #5 of 9 (permalink) Old 06-24-2007, 12:31 AM
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O K ... I replaced the gasket on the RT side of the engine cover, You know the big gasket on the foot brake side of the bike. When I took the exhaust of I had no crush gasket there. So some one removed it before I bought the bike? The exhaust just seems to slip into place. 1991 vn 750.
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post #6 of 9 (permalink) Old 06-24-2007, 03:03 AM
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Quote:
Originally Posted by kanuck69 View Post
O K ... I replaced the gasket on the RT side of the engine cover, You know the big gasket on the foot brake side of the bike. When I took the exhaust of I had no crush gasket there. So some one removed it before I bought the bike? The exhaust just seems to slip into place. 1991 vn 750.
The gaskets are known to not be all that noticable, and new gaskets placed over them when reinstalling the exhaust. This often leads to bolts not fitting properly, or a leak.
If you don't/didn't have an exhaust leak, chances are good it's there.
When they crush, they seal themselves inplace, so they might need pulled out with a pick or needle nose pliers.


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post #7 of 9 (permalink) Old 06-24-2007, 03:18 PM
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I thought the same thing that mine were missing when I removed the pipe until I found them hiding. If they were missing, I believe you would have suspected, or known, you had a leak.

I ended poking around the port with a screwdriver and it popped out. It gets 'crushed' in place and does such a good job of mating up with the cylinder it is hard to find.

Good luck.

Ben-
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post #8 of 9 (permalink) Old 06-25-2007, 12:02 AM
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They get so "crushed" and heated into place it ends up feeling like a thin metal washer and it hard to spot.

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post #9 of 9 (permalink) Old 06-25-2007, 10:37 AM
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Another version of a crush gasket is what comes with spark plugs. The little aluminum ring around the threaded end of the plug. It keeps you from torquing the plugs so tight that superman couldn't get the plug out. Of course, superman could get the plug out no matter how tight, but I was using that as a metaphore, although I can't probably spell metaphore, but superman could spell it.

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