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Old 02-03-2020, 05:54 PM   #1
Mart
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Default Question re liners in a relieved block.

Hi guys, I have a question.

I have fitted liners to a relieved block. What method do you use to bring the liner height down to the height of the relief?

If a carbide burr, what shape works best?

Thanks in advance.

Mart.
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Old 02-03-2020, 06:26 PM   #2
Russ/40
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Default Re: Question re liners in a relieved block.

I used a carbide burr that was ball shaped. To do it again, I would use a cylindrical burr with a ball end. With just the ball it is more difficult to control the burrs tendency to wander. Whatever burr you use, some practice on a junk part will give you the feel for controlling where the burr goes.
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Old 02-04-2020, 01:26 AM   #3
flatheadmurre
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Default Re: Question re liners in a relieved block.

I mill them at the same time as decking.
Its a fair chance that after pounding in liners you need to deck it slightly.
Otherwise the tree radius shape is my favourite when it comes to carbide burrs.
Donīt forget to shamfer it or getting the rings in ainīt to fun.
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Old 02-04-2020, 04:50 AM   #4
Ziggster
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Default Re: Question re liners in a relieved block.

Don't folks use a router to relieve non-relieved blocks? If so, wouldn't that give you a more consistent height?
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Old 02-04-2020, 05:03 AM   #5
JWL
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Default Re: Question re liners in a relieved block.

I just use a oval shaped carbide burr for roughing and finish with a stone about 3/4" diameter that is pointed at the end for matching up the corners. And, I agree a good chamfer is important.
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Old 02-04-2020, 07:07 AM   #6
macdonge
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Default Re: Question re liners in a relieved block.

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Ziggster is right. Somewhere on YouTube a guy posted how he uses a router to do this.



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Old 02-04-2020, 07:29 AM   #7
Ol' Ron
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Default Re: Question re liners in a relieved block.

Allot of good information here. However, I don't feel that reliving a block does no more than reduce the compression. and very little to improve performance. Flow bench tests I run say relieving the cylinder head is more beneficial.. Unfortunately, some blocks come from the factory that way.
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Old 02-04-2020, 07:44 AM   #8
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Default Re: Question re liners in a relieved block.

Here's the link for the YouTube video I referred to:

https://www.youtube.com/watch?v=EV13OkevWS4
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Old 02-04-2020, 07:47 AM   #9
Mart
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Default Re: Question re liners in a relieved block.

Thanks guys.
I don't have a router but have ordered some carbide burrs.
The block is already relieved.
Things are progressing!
Mart.
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