pdm
|
| posted on 19/11/09 at 04:11 PM |
|
|
Taper
Afternoon all,
When measuring for taper in the cylinder bore can you please confirm you would expect the taper to be towards the bottom of the bore ? I.e. if the
bore is tapered, the top of the bore (cylinder head end) will be wider than the bottom of the bore ?
thanks
Paul
|
|
|
|
|
flak monkey
|
| posted on 19/11/09 at 04:15 PM |
|
|
Top will be wider than the bottom as the top is where all the wear is. There will be a limit for the engine. Should be detailed in the haynes book.
David
Sera
http://www.motosera.com
|
|
|
pdm
|
| posted on 19/11/09 at 04:26 PM |
|
|
Cheers, thanks
|
|
|
rusty nuts
|
| posted on 19/11/09 at 07:30 PM |
|
|
Top of the bore will wear on the thrust side and the lower bore will wear on the opposite side due to the crank rotation IIRC
|
|
|
pdm
|
| posted on 19/11/09 at 09:14 PM |
|
|
Interesting...
So if the top wears on thrust surface and bottom on other side do you start with a vertical bore and end up with a slanted one ?
If so and say the wear was at the same sort of rate, presumbly measurements at the top and bottom could be the same even though the bore is no longer
vertical ?
How do you then measure for this eventuality ?
|
|
|
rusty nuts
|
| posted on 20/11/09 at 08:03 PM |
|
|
If and when a rebore is required the boring bar is set to be exactly at right angles to the top surface of the block whilst centralised on the unworn
top of the bore , the boring tool is then set to the correct over size . Slightly simplified but covers your question .
|
|
|
pdm
|
| posted on 20/11/09 at 08:57 PM |
|
|
cheers
|
|
|
.jpg)
