Date: Thu, 7 Jul 2011 13:25:11 -0700
Reply-To: Scott Daniel - Turbovans <scottdaniel@TURBOVANS.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Scott Daniel - Turbovans <scottdaniel@TURBOVANS.COM>
Subject: Re: 2.1 rebuild - hone lifter bores?
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it depends on how the new lifters fit.
I have had to work on one lifter bore for an hour ( on a vw diesel) to get
a new lifter to fit.
so 'it depends' .
with luck..the new lifters will slide in without a sloppy fit ,
and not be terribly tricky to get started in the bore either.
I would think that people would know to wait and see what the 'fit' is ...
and not plan to just 'hone away' like it was something you always do.
honing on cylinder walls has a differnt purpose.
the piston already fits, obviously. It's to 'break the galze' ..it's to
prepare the cylinder wall to accept new rings and work properly with them.
a major factor also is ....piston ring grooves..
if they are too worn, combustion pressure can not get behind the ring
properly enough to push it out against the cylinder wall for sealing there.
and..
on waterboxer egnines..the pistons, rings and barrels are the longest
lasting part of the engine ..
very rarely a problem there. Also ..as a rule, if rings are distrubed, they
should be replaced with new ones.
so see how the lifters fit.
it's *all* about careful 'fitting' , of everything inside the engine.
scott
www.turbovans.com
----- Original Message -----
From: "John Rodgers" <inua@CHARTER.NET>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Thursday, July 07, 2011 11:40 AM
Subject: Re: 2.1 rebuild - hone lifter bores?
> On this point - when you hone a cylinder barrel, you wear away metal,
> making the bore bigger - BUT - you install new rings and the spring
> tension in those rings force the rings tight(to a point) against the
> cylinder bore to compensate for the material removed in honing. In the
> case of the lifters, there are no rings - ie, there is nothing to take
> up the slack from the loss of metal in any honing operation. So honing
> for the lifters would simply make for an even more sloppy fit.
>
> So - don't do it.
>
> John
>
>
> John Rodgers
> Clayartist and Moldmaker
> 88'GL VW Bus Driver
> Chelsea, AL
> Http://www.moldhaus.com
>
>
> On 7/7/2011 12:49 PM, Tom Hargrave wrote:
>> Jim is right but you need to understand why.
>>
>> Honing just like any other operation removes metal and only makes your
>> lifter bores larger& your lifters looser.
>>
>> If anything you need to measure your lifter bores to see if they are too
>> large already.
>>
>> Thanks, Tom Hargrave
>> www.stir-plate.com
>> www.towercooler.com
>> www.kegkits.com
>>
>>
>> -----Original Message-----
>> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf
>> Of
>> Jim Arnott
>> Sent: Thursday, July 07, 2011 11:44 AM
>> To: vanagon@gerry.vanagon.com
>> Subject: Re: 2.1 rebuild - hone lifter bores?
>>
>> -----Original Message-----
>> From: Tom Lambas
>> Sent: Thursday, July 07, 2011 9:24 AM
>> To: vanagon@GERRY.VANAGON.COM
>> Subject: [VANAGON] 2.1 rebuild - hone lifter bores?
>>
>> Hi folks, should I hone, or scuff up my lifter bores? They have some
>> bright
>> areas. New lifters going in. Thanks for any advice - Tom.
>>
>> In a word, "No."
>>
>> Jim
>> -----
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>>
>>
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