EVO All Evo Model Discussion

How difficult to swap head gaskets?

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Old Aug 13, 2025 | 03:10 PM
  #11  
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Originally Posted by IBDAGRIZ
Was there any clean up on the heads when it was reassembled by the Indy? Sometimes a little smoothing can help if the surface is slightly off.
Depending on which thought process you follow, you can either remove the heads and replace the gaskets and reassemble, or also remove the cylinders with pistons still inside the cylinder and replace the base gaskets as well.
Option two gives you a good look at pretty much everything that could be giving you problems. Option one let's you roll the dice and hope you do it better than the other guy did ( it does happen) and see what happens when you get it back together.

I think it all depends on how much you want to dive into it and what your wallet can do. To me, you need the gasket set anyway, so just pull it all apart and get a good look and fix it correctly.

How many miles on the lifters? You know, while you're there...

Griz
Yeah, they send them to be machined, or at least they said they did and charged me for it.
 
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Old Aug 13, 2025 | 03:11 PM
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Originally Posted by Silentgreyfellow
No other independents in your area?
Two won't work on it and both referred me right back to this place.

Still looking, though.
 
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Old Aug 13, 2025 | 03:14 PM
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Originally Posted by Jake707
How hard is it? Easy if you know what youre doing haha.
I've done quite a bit of wrenching on this bike and other things, but I don't have the confidence to tackle anything quite so "core."

 
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Old Aug 13, 2025 | 03:44 PM
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Before I go too deeply down this rabbit hole, is there any possibility that one or more of the head bolts just might need to be re-torqued?

EDIT: Never mind. I'm reading that this isn't a good idea. But a local shop can take it in next week.
 

Last edited by Windseeker; Aug 13, 2025 at 03:55 PM.
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Old Aug 13, 2025 | 03:56 PM
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Originally Posted by Windseeker
Yeah, they send them to be machined, or at least they said they did and charged me for it.
If the heads were machined back then.
Try to do something to make sure studs are secure and pulling any.
There are a number of ways to ck,just according to what's with in your means.

If you get in this yourself do what you can not to do it again

I can remember when you first posted about this

Good Luck WP
 
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Old Aug 13, 2025 | 05:56 PM
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Originally Posted by Windseeker
Is there any possibility that one or more of the head bolts just might need to be re-torqued?

That is a good possibility to at least try and you might find one or more that won't tighten. There would be your problem.
If they all tighten up, that's good for you stud wise.

EDIT: Never mind. I'm reading that this isn't a good idea. But a local shop can take it in next week.
That's gonna add up quickly, so I would recommend trying to tighten them up to just eliminate that or point you right to it.

Griz
 
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Old Aug 14, 2025 | 12:17 PM
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Weather you or a shop does this somebody needs to make sure the threads for the head bolts and studs are clean very clean.
I use an acid brush to lightly coat the threads with ATF for assembly. I think it helps to get the heads torqued correctly.

With the trouble you've had cover all your bases


WP



 
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Old Aug 14, 2025 | 01:00 PM
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Should do the base gaskets as well.
 
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Old Aug 14, 2025 | 02:01 PM
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Originally Posted by WP50
Weather you or a shop does this somebody needs to make sure the threads for the head bolts and studs are clean very clean.
I use an acid brush to lightly coat the threads with ATF for assembly. I think it helps to get the heads torqued correctly.

With the trouble you've had cover all your bases


WP
Don't forget the underside of the 12 point head bolts (actually long nuts) where the underside of the flange contacts the head. Factory recommends lube to that flange when torquing down.
 
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Old Aug 14, 2025 | 02:02 PM
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Originally Posted by BigMike
Should do the base gaskets as well.
Cometic SLS!
 
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