Crankcase pulley surface

"Bas" <nospamplease RemoveThis @nerdshack.com> wrote in message
news:475c4032$0$27618$bf4948fe@news.tele2.nl...
> Hi All,
>
> I've recently bought a 1964 1200 engine as a longblock, which I'm now
> trying to rebuild. Disassembly went pretty well, but while cleaning the
> case I noticed something that bothers me. It looks like the pulley was
> bent up pretty bad and started atacking my case Here's a picture:
>
> http://img68.imageshack.us/my.php?image=pulleysurfacebs1.jpg
>
> So I'm wondering what to do with it? The case probably needs an
> alignbore, but isn't this surface used as a guide by the boring tool? Or
> can this area be align bored itself as well? I'm guessing that boring
> here could cause problems with oil passing through the increased pulley
> to case distance, so that does not sound really good...
>
> What are your thoughts on this?
>
>
> Bas
>
>

doesn't look bad in the pic, i would use some steel wool or emory cloth and
clean it up.... that part of the case does not get cut during an align bore
and if you have to take material off to make you satisfied with the
appearance, you may be forced to cut to size and install a "sand seal" with
appropriate pulley....this means other modifications to ensure proper
crankcase ventilation...
 >> Stay informed about: Crankcase pulley surface 

>
> I read somewhere
> that a case that is damaged in this area (the grooved are quite deep
> although pic doesn't show that very well) could not be align bored and
> should be scrapped. So thats where I panicked
>
--------------------------------------------------------------------------------------------------------------

That is because the El Cheepo align-boring tools index on the pulley
opening (and on the oil seal recess on the opposite end). But good
shops don't use those cheap, portable align-boring tools.

If you want it done right, pull the head-stays and ship the crankcase
to RIMCO or the Pauter brothers... indeed, to virtually any
PROFESSIONAL shop.

The odds of getting a good align-bore with a portable tool are
directly proportional to the amount of experience the user has as a
MACHINIST, which for the typical shade-tree type is virtually nil.
The problem isn't with bolting the thing up & turning it on -- any
idiot can do that. But the quality of the cut depends upon the shape,
sharpness and set of the cutters -- and in that area the typical shade-
tree type hasn't any idea in the blue-eyed world what they're doing.

-Bob Hoover
 >> Stay informed about: Crankcase pulley surface 

Joey Tribiani schreef:
> "Bas" <nospamplease.DeleteThis@nerdshack.com> wrote in message
> news:475c4032$0$27618$bf4948fe@news.tele2.nl...
>> Hi All,
>>
>> I've recently bought a 1964 1200 engine as a longblock, which I'm now
>> trying to rebuild. Disassembly went pretty well, but while cleaning the
>> case I noticed something that bothers me. It looks like the pulley was
>> bent up pretty bad and started atacking my case Here's a picture:
>>
>> http://img68.imageshack.us/my.php?image=pulleysurfacebs1.jpg
>>
>> So I'm wondering what to do with it? The case probably needs an
>> alignbore, but isn't this surface used as a guide by the boring tool? Or
>> can this area be align bored itself as well? I'm guessing that boring
>> here could cause problems with oil passing through the increased pulley
>> to case distance, so that does not sound really good...
>>
>> What are your thoughts on this?
>>
>>
>> Bas
>>
>>
>
> doesn't look bad in the pic, i would use some steel wool or emory cloth and
> clean it up.... that part of the case does not get cut during an align bore
> and if you have to take material off to make you satisfied with the
> appearance, you may be forced to cut to size and install a "sand seal" with
> appropriate pulley....this means other modifications to ensure proper
> crankcase ventilation...
>
>

well I'm not really concerned about the appearance, I read somewhere
that a case that is damaged in this area (the grooved are quite deep
although pic doesn't show that very well) could not be align bored and
should be scrapped. So thats where I panicked

But if align boring is affected I can have the area repaired and install
a sand seal, never thought about that!

Many thanks to both,


Bas (let the cleaning continue
 >> Stay informed about: Crankcase pulley surface