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| blister |
 Posted: Fri Nov 17, 2006 2:38 pm |
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Rookie
Joined: 17 Nov 2006
Posts: 3
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Hello,
I'm new to the forum. Congratulations, great place to be!
I'm going to big bore my engine with the Wiseco 836 kit.
I know, there is a head gasket included, but is the gasket good enough to
avoid leaking? Axl, I saw at one of your pictures that you are using a copper
head gasket, is this the way to go for a big bore engine? Where did you get it from?
Any recommendations are welcome.
Thank you,
blister |
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| Satanic Mechanic |
| Posted: Sat Nov 18, 2006 8:00 am |
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Moderator
Joined: 04 Sep 2005
Posts: 309
Location: Munich, Germany
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Hi Blister,
Welcome to the forum and thank you for the nice words! As for the head gasket, the one which is supplied with the Wiseco kit should be good enough. The problem with leaking head gaskets is usually not a gasket failure, but rather a failure to re-torque the head nuts after a while, or to do it right: You should first loosen the head nuts a bit, and then re-torque it with the correct torque. If you don't do that, it often happens that the nut doesn't even move with the torque applied, but if they are loosened first, they will go a bit farther (as they are supposed to).
The advantage of a copper gasket is that it is reusable more often and it adds to the stability of the head and cylinder block because copper is less compressible. But I have also run 900+cc engines with standard gaskets with no head leaks. You are perfectly fine with the gasket you have.
I got my gasket from Cometic, IIRC. The Arias kit doesn't oinclude a gasket, otherwise I would have used that one.
All the best,
Axl |
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| blister |
| Posted: Mon Nov 20, 2006 8:58 pm |
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Rookie
Joined: 17 Nov 2006
Posts: 3
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Hi Axl,
thank you very much for your accomplishment and recommendation.
I have forgotten to say that I'm using the APE heavy studs.
After your words, I will go with the Wiseco gasket and follow your steps.
Thank you,
blister |
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| Satanic Mechanic |
| Posted: Wed Nov 22, 2006 9:01 am |
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Moderator
Joined: 04 Sep 2005
Posts: 309
Location: Munich, Germany
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| With the heavy duty studs, you may also use some more torque on the nuts, like 30% more. I bet you won't have oil trouble then, but, again, don't miss to retorque after a while. |
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| rillo |
| Posted: Mon Dec 04, 2006 8:23 pm |
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Junior member
Joined: 02 Dec 2006
Posts: 10
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How long should you go, in miles, before you attempt the re-torque of the head bolt nut? Also, on a 750 you have to remove the engine to do this. OUCH!! 
Rillo |
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| Satanic Mechanic |
| Posted: Fri Dec 08, 2006 2:16 pm |
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Moderator
Joined: 04 Sep 2005
Posts: 309
Location: Munich, Germany
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| You should re-torque after approx 1000 mls. And yes, it's a PITA to take the engine out just to retorque the head, but this is why so many engines are weeping oil because their owners didn't bite the bullet to do this properly. |
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