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I have replaced head gaskets 3 times on my 1986 aspencade ,and it has blown them every time. It blows them inbetween the cylinders. I even had the heads surface ground this last time. I am woundering if the head bolt could be streched. book dosnt say any thing about it. Thanks for your help Shawn L.
 

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First of all, welcome to the forum.

Is the bike overheating? Are you setting the torque correctly? Are the plugs the correct ones?
 

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hi shawn, if your sure the head an block sealing surfaces are straight an correct and proper head gaskets are being used, try adding a shim washer under each head bolt to keep them from bottoming out from possible stretching. I have never encountered a stretched head bolt on a 1200 wing but you may be the first. also what torque are you using on the head bolts. 42 to 45 lbs come to mind. good luck
 

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hi shawn, if your sure the head an block sealing surfaces are straight an correct and proper head gaskets are being used, try adding a shim washer under each head bolt to keep them from bottoming out from possible stretching. I have never encountered a stretched head bolt on a 1200 wing but you may be the first. also what torque are you using on the head bolts. 42 to 45 lbs come to mind. good luck
+1

I assume you're using the Honda recommended torque pattern (tightening order & torque values) too? My '84-'87 Clymer manual calls for torques of 40 ft. lbs. for the 10mm bolts and 7 ft.lbs. for the 6mm bolts. It shows 7 bolts for a 1200 head. The bottom one is the 6mm bolt, the rest are 10mm. And, the torque pattern IS interesting:
- Start with bottom center 10mm bolt as #1, and the top center bolt as #2. So the torque pattern says that the final tightening to the target values is from the center of the head out.
-#3 is the lower left of the 10mm bolts; #4 is upper right; #5 is lower right; #6 is upper left; and #7 the 6mm bolt at bottom center.
Unless you've been following this pattern and taking it down slowly and equally, it make have caused just enough of a center bow to produce what you're experiencing.
And I'd definitely use new head bolts just to eliminate it as a factor.
Good luck!
 

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You got that right! I had a torque wrench screw up WHILE torquing mains one time but luckily i caught it.
When you say "Clean" ???? Just make sure that isn't just wiping a rag across the block and head. I always spray a light coat of 'Brake-Kleen' across both and blow dry them with the air hose.The next item that touches that area is the gasket.Make sure nobody is playing around the gaskets too getting them oily.NO GASKET SEALER,and proper torque sequence like mentioned above.
 

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Welcome Shaun, can't add much more to what's been said above though. I'm leaning towards the bolts or a minute discrepancy in either the head or the block. Where exactly does the gasket start leaking when it fails?
 
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