<VV> Tell me about line boring

[corvairs]

Yeah, that didn't cross my mind though it should have. - Then the 
concerns are just as you've described along with the fact that 
everything that bolts up to the block (bell housing, top cover, end 
cover, not to mention the crossover pipe etc etc) may no longer line up. 
In addition the clearance in the case is very close for the 164 engine 
so more reliving would be necessary also. Lon

www.corvairunderground.com

Andy Clark wrote:

>Lon, I think that Les is asking about the line boring process wherein
>material is taken off the block parting face(s), then the bearing holes are
>line bored back to standard size. This does not result in needing bearings
>with oversize backshells. Since this brings the heads closer together,
>though, all kinds of ramifications could occur (like bellhousing and rear
>accy cover bolt pattern changes, pushrod lengths, etc..). I don't know if
>this is significant to worry about, though. Is there any info re this in the
>VW community I wonder?
>Andy Clark
>Camano Island, WA.
>1966 140/4 Monza Sedan
>1966 140/4 Yenko Clone
>1966 180/4 Cord 8/10 #60
>----- Original Message ----- 
>From: "corvairs" <lonwall at corvairunderground.com>
>To: "Les" <corvair at mts.net>
>Cc: <virtualvairs at corvair.org>
>Sent: Tuesday, January 30, 2007 3:35 PM
>Subject: Re: <VV> Tell me about line boring
>
>
>  
>
>>Yes they have - then had to replace the block when they found out that
>>there were no oversize bearings available! Lon
>>
>>www.corvairunderground.com
>>
>>Les wrote:
>>
>>    
>>
>>>Anyone ever actually line bored a Corvair block? How far can you go
>>>before having trouble with valvetrain geometry (stock pushrods) or
>>>with bolting on bellhousing/rear housing? Issues to be aware of?
>>>
>>>I have a bunch of blocks here with poor (enlarged) main bearing bores
>>>and marginal cam bores. Getting tired of trying more blocks and
>>>finding they're just as bad as the ones I've got.
>>>
>>>re USAF Museum - visited there about 1994. Well worth the very long
>>>drive, will do it again, and will plan on at least three days there.
>>>
>>>
>>>Les
>>>corvair at mts.net
>>>(VV since 1995)
>>>      
>>>
>
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